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, University of Notre Dame
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Descendants of the first stars: the distinct chemical signature of second generation stars. (arXiv:1801.05044v1 [astro-ph.GA])
Volume 13, Issue 3 - article #2
Tilman Hartwig
,
Naoki Yoshida
,
Mattis Magg
,
Anna Frebel
,
Simon C. O. Glover
,
Facundo A. Gómez
,
Brendan Griffen
,
Miho N. Ishigaki
,
Alexander P. Ji
,
Ralf S. Klessen
,
Brian W. O'Shea
,
Nozomu Tominaga
http://arxiv.org/abs/1801.05044
The formation of the heaviest elements. (arXiv:1801.01190v1 [astro-ph.SR])
Volume 13, Issue 2 - article #15
Anna Frebel
(MIT),
Timothy C. Beers
(Notre Dame)
http://arxiv.org/abs/1801.01190
JINAbase: A database for chemical abundances of metal-poor stars. (arXiv:1711.04410v1 [astro-ph.SR])
Volume 12, Issue 46 - article #4
Abdu Abohalima
(MIT, JINA),
Anna Frebel
(MIT, JINA)
http://arxiv.org/abs/1711.04410
Ultra-metal-poor Stars: Spectroscopic Determination of Stellar Atmospheric Parameters Using Iron Non-LTE Line Abundances
Volume 12, Issue 40 - article #14
Rana Ezzeddine
,
Anna Frebel,
,
Bertrand Plez
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/847/2/142
RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey
Volume 12, Issue 29 - article #21
Vinicius M. Placco
,
Erika M. Holmbeck
,
Anna Frebel
,
Timothy C. Beers
,
Rebecca A. Surman
,
Alexander P. Ji
,
Rana Ezzeddine
,
Sean D. Points
,
Catherine C. Kaleida
,
Terese T. Hansen
,
Charli M. Sakari,
,
Andrew R. Casey
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/844/1/18
RAVE J203843.2-002333: The first highly r-process-enhanced star identified in the RAVE survey. (arXiv:1706.02934v1 [astro-ph.SR])
Volume 12, Issue 24 - article #10
Vinicius M. Placco
,
Erika M. Holmbeck
,
Anna Frebel
,
Timothy C. Beers
,
Rebecca A. Surman
,
Alexander P. Ji
,
Rana Ezzeddine
,
Sean D. Points
,
Catherine C. Kaleida
,
Terese T. Hansen
,
Charli M. Sakari
,
Andrew R. Casey
http://arxiv.org/abs/1706.02934
Bright Metal-Poor Stars from the Hamburg/ESO Survey. II. A Chemodynamical Analysis
Volume 12, Issue 3 - article #7
Timothy C. Beers
,
Vinicius M. Placco
,
Daniela Carollo
,
Silvia Rossi
,
Young Sun Lee
,
Anna Frebel
,
John E. Norris
,
Sarah Dietz,
,
Thomas Masseron
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/835/1/81
Ultra metal-poor stars: Spectroscopic determination of stellar atmospheric parameters using iron Non-LTE line abundances. (arXiv:1612.06309v1 [astro-ph.SR])
Volume 11, Issue 52 - article #5
Rana Ezzeddine
,
Anna Frebel
,
Bertrand Plez
http://arxiv.org/abs/1612.06309
OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. II. SPECTROSCOPY OF AN ULTRA METAL-POOR CEMP-NO STAR
Volume 11, Issue 50 - article #19
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Jinmi Yoon
,
Anirudh Chiti
,
Alexander Heger
,
Conrad Chan
,
Andrew R. Casey,
,
Norbert Christlieb
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/833/1/21
Bright Metal-Poor Stars from the Hamburg/ESO Survey. II. A Chemodynamical Analysis. (arXiv:1611.03762v1 [astro-ph.SR])
Volume 11, Issue 47 - article #2
Timothy C. Beers
,
Vinicius M. Placco
,
Daniela Carollo
,
Silvia Rossi
,
Anna Frebel
,
John E. Norris
,
Sarah Dietz
,
Thomas Masseron
http://arxiv.org/abs/1611.03762
CHEMICAL DIVERSITY IN THE ULTRA-FAINT DWARF GALAXY TUCANA II
Volume 11, Issue 47 - article #23
Alexander P. Ji
,
Anna Frebel
,
Rana Ezzeddine,
,
Andrew R. Casey
The Astrophysical Journal Letters
http://iopscience.iop.org/2041-8205/832/1/L3
Tracing the first stars and galaxies of the Milky Way. (arXiv:1611.00759v1 [astro-ph.GA])
Volume 11, Issue 45 - article #18
Brendan F. Griffen
,
Gregory A. Dooley
,
Alexander P. Ji
,
Brian W. O'Shea
,
Facundo A. Gómez
,
Anna Frebel
http://arxiv.org/abs/1611.00759
Complete Element Abundances of Nine Stars in the r-process Galaxy Reticulum II
Volume 11, Issue 43 - article #22
Alexander P. Ji
,
Anna Frebel
,
Joshua D. Simon,
,
Anirudh Chiti
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/830/2/93
R-process enrichment from a single event in an ancient dwarf galaxy. (arXiv:1512.01558v4 [astro-ph.GA] UPDATED)
Volume 11, Issue 39 - article #14
Alexander P. Ji
,
Anna Frebel
,
Anirudh Chiti
,
Joshua D. Simon
http://arxiv.org/abs/1512.01558
Chemical Diversity in the Ultra-faint Dwarf Galaxy Tucana II. (arXiv:1609.02915v1 [astro-ph.GA])
Volume 11, Issue 38 - article #4
Alexander P. Ji
,
Anna Frebel
,
Rana Ezzeddine
,
Andrew R. Casey
http://arxiv.org/abs/1609.02915
Observational Constraints on First-Star Nucleosynthesis. II. Spectroscopy of an Ultra Metal-Poor CEMP-no Star. (arXiv:1609.02134v1 [astro-ph.SR])
Volume 11, Issue 37 - article #12
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Jinmi Yoon
,
Anirudh Chiti
,
Alexander Heger
,
Conrad Chan
,
Andrew R. Casey
,
Norbert Christlieb
http://arxiv.org/abs/1609.02134
Complete element abundances of nine stars in the r-process galaxy Reticulum II. (arXiv:1607.07447v1 [astro-ph.GA])
Volume 11, Issue 31 - article #1
Alexander P. Ji
,
Anna Frebel
,
Joshua D. Simon
,
Anirudh Chiti
http://arxiv.org/abs/1607.07447
The Chemical Evolution of the Bootes I Ultra-faint Dwarf Galaxy
Volume 11, Issue 31 - article #10
Anna Frebel
,
John E. Norris
,
Gerard Gilmore,
,
Rosemary F. G. Wyse
The Astrophysical Journal
http://iopscience.iop.org/0004-637X/826/2/110
The EMBLA survey - metal-poor stars in the Galactic bulge
Volume 11, Issue 23 - article #5
Howes
,
L. M.
,
Asplund
,
M.
,
Keller
,
S. C.
,
Casey
,
A. R.
,
Yong
,
D.
,
Lind
,
K.
,
Frebel
,
A.
,
Hays
,
A.
,
Alves-Brito
,
A.
,
Bessell
,
M. S.
,
Casagrande
,
L.
,
Marino
,
A. F.
,
Nataf
,
D. M.
,
Owen
,
C. I.
,
Da Costa
,
G. S.
,
Schmidt
,
B. P.
,
Tisserand
,
P.
>Oxford University Press
http://mnras.oxfordjournals.org/cgi/content/short/460/1/884?rss=1
Near-Field Cosmology with Extremely Metal-Poor Stars
Volume 11, Issue 17 - article #3
Anna Frebel
http://www.annualreviews.org/doi/abs/10.1146/annurev-astro-082214-122423?ai=s3&mi=3fndc3&af=R
Enhanced Tidal Stripping of Satellites in the Galactic Halo from Dark Matter Self-Interactions
Volume 11, Issue 14 - article #6
Gregory A. Dooley
,
Annika H.G. Peter
,
Mark Vogelsberger
,
Jesús Zavala
,
Anna Frebel
arXiv.org - Astrophysics - Volume: 2016, Issue: 1 Apr
arXiv:1603.08919
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Segue 1 -- A Compressed Star Formation History before Reionization
Volume 11, Issue 9 - article #14
David Webster
,
Anna Frebel
,
and
Joss Bland-Hawthorn
The Astrophysical Journal - Volume: 818, Issue: 1
View article
PDF (829 KB)
The Caterpillar Project: A Large Suite of Milky Way Sized Halos
Volume 11, Issue 9 - article #15
Brendan F. Griffen
,
Alexander P. Ji
,
Gregory A. Dooley
,
Facundo A. Gómez
,
Mark Vogelsberger
,
Brian W. O'Shea
,
and
Anna Frebel
The Astrophysical Journal - Volume: 818, Issue: 1
View article
PDF (4.15 MB)
High-resolution Spectroscopy of Extremely Metal-poor Stars in the Least-evolved Galaxies: Bootes II
Volume 11, Issue 6 - article #20
Alexander P. Ji
,
Anna Frebel
,
Joshua D. Simon
,
and
Marla Geha
The Astrophysical Journal - Volume: 817, Issue: 1
View article
PDF (1.70 MB)
The Chemical Compositions of Very Metal-Poor Stars HD 122563 and HD 140283; A View From the Infrared
Volume 11, Issue 3 - article #11
Melike Afşar
,
Christopher Sneden
,
Anna Frebel
,
Hwihyun Kim
,
Gregory N. Mace
,
Kyle F. Kaplan
,
Hye-In Lee
,
Hee-Young Oh
,
Jae Sok Oh
,
Soojong Pak
,
Chan Park
,
Michael D. Pavel
,
In-Soo Yuk
,
Daniel T. Jaffe
arXiv.org - Astrophysics - Volume: 2016, Issue: 15 Jan
arXiv:1601.02450
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The Chemical Abundances of Stars in the Halo (CASH) Project. III. A New Classification Scheme for Carbon-enhanced Metal-poor Stars with s-process Element Enhancement
Volume 10, Issue 44 - article #26
Julie K. Hollek
,
Anna Frebel
,
Vinicius M. Placco
,
Amanda I. Karakas
,
Matthew Shetrone
,
Christopher Sneden
,
and
Norbert Christlieb
The Astrophysical Journal - Volume: 814, Issue: 2
View article
PDF (1.65 MB)
High-resolution spectroscopy of extremely metal-poor stars in the least evolved galaxies: Bootes II
Volume 10, Issue 40 - article #7
Alexander P. Ji
,
Anna Frebel
,
Joshua D. Simon
,
Marla Geha
arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
arXiv:1510.07632
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The Chemical Abundances of Stars in the Halo (CASH) Project. III. A New Classification Scheme for Carbon-Enhanced Metal-poor Stars with S-process Element Enhancement
Volume 10, Issue 40 - article #16
Julie K. Hollek
(UT/JINA),
Anna Frebel
(MIT/JINA),
Vinicius M. Placco
(U Notre Dame/JINA),
Amanda I. Karakas
(ANU),
Matthew Shetrone
(UT/McDonald Obs.),
Christopher Sneden
(UT),
Norbert Christlieb
(Heidelberg)
arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
arXiv:1510.06825
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Preserving chemical signatures of primordial star formation in the first low-mass stars
Volume 10, Issue 39 - article #24
Alexander P. Ji
,
Anna Frebel
,
and
Volker Bromm
Monthly Notices of the Royal Astronomical Society - Volume: 454, Issue: 1
Abstract
Full Text (HTML)
Full Text (PDF)
The Caterpillar Project: A Large Suite of Milky Way Sized Halos
Volume 10, Issue 33 - article #9
Brendan F. Griffen
,
Alexander P. Ji
,
Gregory A. Dooley
,
Facundo A. Gómez
,
Mark Vogelsberger
,
Brian W. O'Shea
,
Anna Frebel
arXiv.org - Astrophysics - Volume: 2015, Issue: 11 Sep
arXiv:1509.01255
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]
Segue 1 - A Compressed Star Formation History Before Reionization
Volume 10, Issue 32 - article #5
David Webster
,
Anna Frebel
,
Joss Bland-Hawthorn
arXiv.org - Astrophysics - Volume: 2015, Issue: 4 Sep
arXiv:1509.00856
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]
Hubble Space Telescope Near-Ultraviolet Spectroscopy of Bright CEMP-s Stars
Volume 10, Issue 31 - article #4
Vinicius M. Placco
,
Timothy C. Beers
,
Inese I. Ivans
,
Dan Filler
,
Julie A. Imig
,
Ian U. Roederer
,
Carlo Abate
,
Terese Hansen
,
John J. Cowan
,
Anna Frebel
,
James E. Lawler
,
Hendrik Schatz
,
Christopher Sneden
,
Jennifer S. Sobeck
,
Wako Aoki
,
Verne V. Smith
,
Michael Bolte
arXiv.org - Astrophysics - Volume: 2015, Issue: 28 Aug
arXiv:1508.05872
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Preserving chemical signatures of primordial star formation in the first low-mass stars
Volume 10, Issue 31 - article #7
Alexander P. Ji
(MIT),
Anna Frebel
(MIT),
Volker Bromm
(UT Austin)
arXiv.org - Astrophysics - Volume: 2015, Issue: 28 Aug
arXiv:1508.06137
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Near-Field Cosmology with Extremely Metal-Poor Stars
Volume 10, Issue 30 - article #3
Anna Frebel
Annual Review of Astronomy and Astrophysics - Volume: 53, Issue: August 2015
PDF (2426K)
An Elemental Assay of Very, Extremely, and Ultra-metal-poor Stars
Volume 10, Issue 26 - article #16
T. Hansen
,
C. J. Hansen
,
N. Christlieb
,
T. C. Beers
,
D. Yong
,
M. S. Bessell
,
A. Frebel
,
A. E. GarcÃa Pérez
,
V. M. Placco
,
J. E. Norris
,
and
M. Asplund
The Astrophysical Journal - Volume: 807, Issue: 2
View article
PDF (1.00 MB)
CD -24_17504 revisited: a new comprehensive element abundance analysis
Volume 10, Issue 25 - article #7
Heather R. Jacobson
,
Anna Frebel
(MIT)
arXiv.org - Astrophysics - Volume: 2015, Issue: 10 Jul
arXiv:1507.02304
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SD 1313-0019 -- Another second-generation star with [Fe/H] = -5.0, observed with the Magellan Telescope
Volume 10, Issue 25 - article #14
Anna Frebel
(MIT),
Anirudh Chiti
(MIT),
Alexander P. Ji
(MIT),
Heather R. Jacobson
(MIT),
Vinicius M. Placco
(Notre Dame U/JINA)
arXiv.org - Astrophysics - Volume: 2015, Issue: 10 Jul
arXiv:1507.01973
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Metal-Poor Stars Observed with the Magellan Telescope. III. New Extremely and Ultra Metal-Poor Stars from SDSS/SEGUE and Insights on the Formation of Ultra Metal-Poor Stars
Volume 10, Issue 25 - article #20
Vinicius M. Placco
,
Anna Frebel
,
Young Sun Lee
,
Heather R. Jacobson
,
Timothy C. Beers
,
Jose M. Pena
,
Conrad Chan
,
Alexander Heger
arXiv.org - Astrophysics - Volume: 2015, Issue: 17 Jul
arXiv:1507.03656
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An Elemental Assay of Very, Extremely, and Ultra Metal-Poor Stars
Volume 10, Issue 22 - article #1
T. Hansen
,
C. J. Hansen
,
N. Christlieb
,
T. C. Beers
,
D. Yong
,
M. S. Bessell
,
A. Frebel
,
A. E. Garcia Perez
,
V. M. Placco
,
J. E. Norris
,
M. Asplund
arXiv.org - Astrophysics - Volume: 2015, Issue: 5 Jun
arXiv:1506.00579
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Nucleosynthesis in a Primordial Supernova: Carbon and Oxygen Abundances in SMSS J031300.36-670839.31
Volume 10, Issue 19 - article #6
Michael Bessell
,
Remo Collett
,
Stefan Keller
,
Anna Frebel
,
Alexander Heger
,
Andrew Casey
,
Thomas Masseron
,
Martin Asplund
,
Heather Jacobsen
,
Karin Lind
,
Anna Marino
,
John Norris
,
David Yong
,
Gary Da Costa
,
Conrad Chan
,
Zazralt Magic
,
Brian Schmidt
,
Patrick Tisserand
arXiv.org - Astrophysics - Volume: 2015, Issue: 15 May
arXiv:1505.03756
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High-Resolution Spectroscopic Study of Extremely Metal-Poor Star Candidates from the SkyMapper Survey
Volume 10, Issue 15 - article #4
Heather. R. Jacobson
(MIT),
Stefan Keller
(ANU),
Anna Frebel
(MIT),
Andrew R. Casey
(U. Cambridge),
Martin Asplund
(ANU),
Michael S. Bessell
(ANU),
Gary S. Da Costa
(ANU),
Karin Lind
(U. Uppsala),
Anna F. Marino
(ANU),
John E. Norris
(ANU),
Jose M. Pena
(MIT),
Brian P. Schmidt
(ANU),
Patrick Tisserand
(ANU),
Jennifer M. Walsh
(Harvard),
David Yong
(ANU),
Qinsi Yu
(MIT)
arXiv.org - Astrophysics - Volume: 2015, Issue: 17 Apr
arXiv:1504.03344
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Chemical Signatures of the First Supernovae in the Sculptor Dwarf Spheroidal Galaxy
Volume 10, Issue 13 - article #21
Joshua D. Simon
,
Heather R. Jacobson
,
Anna Frebel
,
Ian B. Thompson
,
Joshua J. Adams
,
and
Stephen A. Shectman
The Astrophysical Journal - Volume: 802, Issue: 2
View article
PDF (368 KB)
Near-Field Cosmology with Metal-Poor Stars
Volume 10, Issue 4 - article #3
Anna Frebel
(MIT),
John E. Norris
(ANU)
arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Jan
arXiv:1501.06921
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Chemical Signatures of the First Supernovae in the Sculptor Dwarf Spheroidal Galaxy
Volume 9, Issue 25 - article #17
Joshua D. Simon
(Carnegie Observatories),
Heather R. Jacobson
,
Anna Frebel
(MIT),
Ian B. Thompson
(Carnegie Observatories),
Joshua J. Adams
(ASML),
Stephen A. Shectman
(Carnegie Observatories)
arXiv.org - Astrophysics - Volume: 2014, Issue: 19 Dec
arXiv:1412.5176
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Carbon-enhanced Metal-poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
Volume 9, Issue 25 - article #54
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
and
Richard J. Stancliffe
The Astrophysical Journal - Volume: 797, Issue: 1
View article
PDF (1.10 MB)
Detection of Neutral Phosphorus in the Near-ultraviolet Spectra of Late-type Stars
Volume 9, Issue 25 - article #55
Ian U. Roederer
,
Heather R. Jacobson
,
Thanawuth Thanathibodee
,
Anna Frebel
,
and
Elizabeth Toller
The Astrophysical Journal - Volume: 797, Issue: 1
View article
PDF (648 KB)
The Chemical Evolution of Phosphorus
Volume 9, Issue 24 - article #29
Heather R. Jacobson
(MIT),
Thanawuth Thanathibodee
(MIT),
Anna Frebel
(MIT),
Ian U. Roederer
(Michigan),
Gabriele Cescutti
(AIP),
Francesca Matteucci
(INAF Trieste)
arXiv.org - Astrophysics - Volume: 2014, Issue: 7 Nov
arXiv:1410.8538
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The Chemical Evolution of Phosphorus
Volume 9, Issue 24 - article #70
Heather R. Jacobson
,
Thanawuth Thanathibodee
,
Anna Frebel
,
Ian U. Roederer
,
Gabriele Cescutti
,
and
Francesca Matteucci
The Astrophysical Journal Letters - Volume: 796, Issue: 2
View article
PDF (453 KB)
Carbon-Enhanced Metal-Poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
Volume 9, Issue 23 - article #1
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Richard J. Stancliffe
arXiv.org - Astrophysics - Volume: 2014, Issue: 10 Oct
arXiv:1410.2223
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Reconstructing the cosmic evolution of the chemical elements
Volume 9, Issue 21 - article #22
Anna Frebel
(MIT)
arXiv.org - Astrophysics - Volume: 2014, Issue: 22 Aug
arXiv:1408.4832
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Hubble Space Telescope
Near-ultraviolet Spectroscopy of the Bright CEMP-no Star BD+44°493
Volume 9, Issue 21 - article #73
Vinicius M. Placco
,
Timothy C. Beers
,
Ian U. Roederer
,
John J. Cowan
,
Anna Frebel
,
Dan Filler
,
Inese I. Ivans
,
James E. Lawler
,
Hendrik Schatz
,
Christopher Sneden
,
Jennifer S. Sobeck
,
Wako Aoki
,
and
Verne V. Smith
The Astrophysical Journal - Volume: 790, Issue: 1
View article
PDF (835 KB)
New Detections of Arsenic, Selenium, and Other Heavy Elements in Two Metal-poor Stars
Volume 9, Issue 21 - article #86
Ian U. Roederer
,
Hendrik Schatz
,
James E. Lawler
,
Timothy C. Beers
,
John J. Cowan
,
Anna Frebel
,
Inese I. Ivans
,
Christopher Sneden
,
and
Jennifer S. Sobeck
The Astrophysical Journal - Volume: 791, Issue: 1
View article
PDF (871 KB)
New Detections of Arsenic, Selenium, and Other Heavy Elements in Two Metal-Poor Stars
Volume 9, Issue 20 - article #65
Ian U. Roederer
,
Hendrik Schatz
,
James E. Lawler
,
Timothy C. Beers
,
John J. Cowan
,
Anna Frebel
,
Inese I. Ivans
,
Christopher Sneden
,
Jennifer S. Sobeck
arXiv.org - Astrophysics - Volume: 2014, Issue: 20 Jun
arXiv:1406.4554
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Exploring the Origin of Lithium, Carbon, Strontium and Barium with four new Ultra Metal-Poor Stars
Volume 9, Issue 20 - article #76
T. Hansen
,
C. J. Hansen
,
N. Christlieb
,
D. Yong
,
M. S. Bessell
,
A. E. García Pérez
,
T. C. Beers
,
V. M. Placco
,
A. Frebel
,
J. E. Norris
,
M. Asplund
arXiv.org - Astrophysics - Volume: 2014, Issue: 23 May
arXiv:1405.5846
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Hubble Space Telescope Near-Ultraviolet Spectroscopy of the Bright CEMP-no Star BD+44 493
Volume 9, Issue 20 - article #134
Vinicius Placco
,
Timothy Beers
,
Ian Roederer
,
John Cowan
,
Anna Frebel
,
Dan Filler
,
Inese I. Ivans
,
James E. Lawler
,
Hendrik Schatz
,
Christopher Sneden
,
Jennifer Sobeck
,
Wako Aoki
,
Verne Smith
arXiv.org - Astrophysics - Volume: 2014, Issue: 6 Jun
arXiv:1406.0538
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The Aquarius comoving group is not a disrupted classical globular cluster
Volume 9, Issue 20 - article #171
A. R. Casey
,
S. C. Keller
,
A. Alves-Brito
,
A. Frebel
,
G. Da Costa
,
A. Karakas
,
D. Yong
,
K. C. Schlaufman
,
H. R. Jacobson
,
Q. Yu
,
and
C. Fishlock
Monthly Notices of the Royal Astronomical Society - Volume: 443, Issue: 1
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Exploring the Origin of Lithium, Carbon, Strontium, and Barium with Four New Ultra Metal-poor Stars
Volume 9, Issue 20 - article #184
T. Hansen
,
C. J. Hansen
,
N. Christlieb
,
D. Yong
,
M. S. Bessell
,
A. E. GarcÃa Pérez
,
T. C. Beers
,
V. M. Placco
,
A. Frebel
,
J. E. Norris
,
and
M. Asplund
The Astrophysical Journal - Volume: 787, Issue: 2
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Segue 1: An Unevolved Fossil Galaxy from the Early Universe
Volume 9, Issue 18 - article #12
Anna Frebel
,
Joshua D. Simon
,
and
Evan N. Kirby
The Astrophysical Journal - Volume: 786, Issue: 1
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Segue 1: An Unevolved Fossil Galaxy from the Early Universe
Volume 9, Issue 13 - article #10
Anna Frebel
(MIT),
Joshua D. Simon
(Carnegie),
Evan N. Kirby
(Irvine)
arXiv.org - Astrophysics - Volume: 2014, Issue: 28 Mar
arXiv:1403.6116
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The Chemical Imprint of Silicate Dust on the Most Metal-poor Stars
Volume 9, Issue 8 - article #27
Alexander P. Ji
,
Anna Frebel
,
and
Volker Bromm
The Astrophysical Journal - Volume: 782, Issue: 2
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A single low-energy, iron-poor supernova as the source of metals in the star SMSS J 031300.36-670839.3
Volume 9, Issue 7 - article #1
S. C. Keller
,
M. S. Bessell
,
A. Frebel
,
A. R. Casey
,
M. Asplund
,
H. R. Jacobson
,
K. Lind
,
J. E. Norris
,
D. Yong
,
A. Heger
,
Z. Magic
,
G. S. Da Costa
,
B. P. Schmidt
,
P. Tisserand
arXiv.org - Astrophysics - Volume: 2014, Issue: 14 Feb
arXiv:1402.1517
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Metal-poor Stars Observed with the Magellan Telescope. II. Discovery of Four Stars with [Fe/H] ≤ –3.5
Volume 9, Issue 4 - article #47
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Norbert Christlieb
,
Young Sun Lee
,
Catherine R. Kennedy
,
Silvia Rossi
,
and
Rafael M. Santucci
The Astrophysical Journal - Volume: 781, Issue: 1
View article
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Metal-Poor Stars Observed with the Magellan Telescope II. Discovery of Four Stars with [Fe/H] < -3.5
Volume 8, Issue 48 - article #6
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Norbert Christlieb
,
Young Sun Lee
,
Catherine R. Kennedy
,
Silvia Rossi
,
Rafael M. Santucci
arXiv.org - Astrophysics - Volume: 2013, Issue: 2 Dec
arXiv:1311.5855
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Metal-Poor Stars Observed with the Magellan Telescope II. Discovery of Four Stars with [Fe/H] < -3.5
Volume 8, Issue 48 - article #15
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Norbert Christlieb
,
Young Sun Lee
,
Catherine R. Kennedy
,
Silvia Rossi
,
Rafael M. Santucci
arXiv.org - Astrophysics - Volume: 2013, Issue: 25 Nov
arXiv:1311.5855
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The Chemical Imprint of Dust on the Most Metal-Poor Stars
Volume 8, Issue 28 - article #12
Alexander P. Ji
,
Anna Frebel
,
Volker Bromm
arXiv.org - Astrophysics - Volume: 2013, Issue: 12 Jul
arXiv:1307.2239
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Metal-poor Stars Observed with the Magellan Telescope. I. Constraints on Progenitor Mass and Metallicity of AGB Stars Undergoing
s
-process Nucleosynthesis
Volume 8, Issue 23 - article #23
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Amanda I. Karakas
,
Catherine R. Kennedy
,
Silvia Rossi
,
Norbert Christlieb
,
and
Richard J. Stancliffe
The Astrophysical Journal - Volume: 770, Issue: 2
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Deriving Stellar Effective Temperatures of Metal-poor Stars with the Excitation Potential Method
Volume 8, Issue 20 - article #19
Anna Frebel
,
Andrew R. Casey
,
Heather R. Jacobson
,
and
Qinsi Yu
The Astrophysical Journal - Volume: 769, Issue: 1
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The 300km/s stellar stream near Segue 1: Insights From high-resolution spectroscopy of its brightest star
Volume 8, Issue 19 - article #13
Anna Frebel
(MIT),
Ragnhild Lunnan
(Harvard),
Andrew R. Casey
(ANU, MIT),
John E. Norris
(ANU),
Rosemary F. G. Wyse
(JHU),
Gerard Gilmore
(IoA)
arXiv.org - Astrophysics - Volume: 2013, Issue: 10 May
arXiv:1305.1300
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Metal-Poor Stars Observed with the Magellan Telescope I. Constraints on Progenitor Mass and Metallicity of AGB Stars Undergoing s-Process Nucleosynthesis
Volume 8, Issue 18 - article #7
Vinicius M. Placco
,
Anna Frebel
,
Timothy C. Beers
,
Amanda I. Karakas
,
Catherine R. Kennedy
,
Silvia Rossi
,
Norbert Christlieb
,
Richard J. Stancliffe
arXiv.org - Astrophysics - Volume: 2013, Issue: 3 May
arXiv:1304.7869
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Deriving Stellar Effective Temperatures of Metal-Poor Stars with the Excitation Potential Method
Volume 8, Issue 15 - article #2
Anna Frebel
(MIT),
Andrew R. Casey
(ANU),
Heather R. Jacobson
(MIT),
Qinsi Yu
(MIT)
arXiv.org - Astrophysics - Volume: 2013, Issue: 12 Apr
arXiv:1304.2396
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The Most Metal-poor Stars. I. Discovery, Data, and Atmospheric Parameters
Volume 7, Issue 52 - article #23
John E. Norris
,
M. S. Bessell
,
David Yong
,
N. Christlieb
,
P. S. Barklem
,
M. Asplund
,
Simon J. Murphy
,
Timothy C. Beers
,
Anna Frebel
,
and
S. G. Ryan
The Astrophysical Journal - Volume: 762, Issue: 1
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The Most Metal-poor Stars. II. Chemical Abundances of 190 Metal-poor Stars Including 10 New Stars with [Fe/H] ≤ –3.5
Volume 7, Issue 52 - article #24
David Yong
,
John E. Norris
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
and
S. G. Ryan
The Astrophysical Journal - Volume: 762, Issue: 1
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The Most Metal-poor Stars. III. The Metallicity Distribution Function and Carbon-enhanced Metal-poor Fraction
Volume 7, Issue 52 - article #25
David Yong
,
John E. Norris
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
and
S. G. Ryan
The Astrophysical Journal - Volume: 762, Issue: 1
Abstract
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The Most Metal-poor Stars. IV. The Two Populations with [Fe/H] lesssim –3.0
Volume 7, Issue 52 - article #26
John E. Norris
,
David Yong
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Gerard Gilmore
,
Rosemary F. G. Wyse
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
and
S. G. Ryan
The Astrophysical Journal - Volume: 762, Issue: 1
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New
Hubble Space Telescope
Observations of Heavy Elements in Four Metal-Poor Stars
Volume 7, Issue 52 - article #29
Ian U. Roederer
,
James E. Lawler
,
Jennifer S. Sobeck
,
Timothy C. Beers
,
John J. Cowan
,
Anna Frebel
,
Inese I. Ivans
,
Hendrik Schatz
,
Christopher Sneden
,
and
Ian B. Thompson
The Astrophysical Journal Supplement - Volume: 203, Issue: 2
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Chemical Abundances of Metal-poor RR Lyrae Stars in the Magellanic Clouds
Volume 7, Issue 51 - article #22
Raoul Haschke
,
Eva K. Grebel
,
Anna Frebel
,
Sonia Duffau
,
Camilla J. Hansen
,
and
Andreas Koch
Astronomical Journal - Volume: 144, Issue: 3
doi:10.1088/0004-6256/144/3/88
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The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0
Volume 7, Issue 46 - article #15
John E. Norris
,
David Yong
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Gerard Gilmore
,
Rosemary F.G. Wyse
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
S. G. Ryan
arXiv.org - Astrophysics - Volume: 2012, Issue: 16 Nov
arXiv:1211.3157
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Chemical Signatures of the First Galaxies: Criteria for One-shot Enrichment
Volume 7, Issue 44 - article #20
Anna Frebel
and
Volker Bromm
The Astrophysical Journal - Volume: 759, Issue: 2
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New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars
Volume 7, Issue 43 - article #6
Ian U. Roederer
,
James E. Lawler
,
Jennifer S. Sobeck
,
Timothy C. Beers
,
John J. Cowan
,
Anna Frebel
,
Inese I. Ivans
,
Hendrik Schatz
,
Christopher Sneden
,
Ian B. Thompson
arXiv.org - Astrophysics - Volume: 2012, Issue: 26 Oct
arXiv:1210.6387
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High-Resolution Spectroscopy of Extremely Metal-Poor Stars from SDSS/SEGUE: I. Atmospheric Parameters and Chemical Compositions
Volume 7, Issue 41 - article #4
Wako Aoki
,
Timothy C. Beers
,
Young Sun Lee
,
Satoshi Honda
,
Hiroko Ito
,
Masahide Takada-Hidai
,
Anna Frebel
,
Takuma Suda
,
Masatuki Y. Fujimoto
,
Daniela Carollo
,
Thirupathi Sivarani
arXiv.org - Astrophysics - Volume: 2012, Issue: 12 Oct
arXiv:1210.1946
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The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters
Volume 7, Issue 33 - article #12
John E. Norris
,
M. S. Bessell
,
David Yong
,
N. Christlieb
,
P. S. Barklem
,
M. Asplund
,
Simon J. Murphy
,
Timothy C. Beers
,
Anna Frebel
,
S. G. Ryan
arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Aug
arXiv:1208.2999
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The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5
Volume 7, Issue 33 - article #13
David Yong
,
John E. Norris
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
S. G. Ryan
arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Aug
arXiv:1208.3003
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The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction
Volume 7, Issue 33 - article #14
David Yong
,
John E. Norris
,
M. S. Bessell
,
N. Christlieb
,
M. Asplund
,
Timothy C. Beers
,
P. S. Barklem
,
Anna Frebel
,
S. G. Ryan
arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Aug
arXiv:1208.3016
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The Metallicity of the Monoceros Stream
Volume 7, Issue 25 - article #41
Aaron M. Meisner
,
Anna Frebel
,
Mario JuriÄ
,
and
Douglas P. Finkbeiner
The Astrophysical Journal - Volume: 753, Issue: 2
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Detection of the Second
r
-process Peak Element Tellurium in Metal-poor Stars
Volume 7, Issue 10 - article #20
Ian U. Roederer
,
James E. Lawler
,
John J. Cowan
,
Timothy C. Beers
,
Anna Frebel
,
Inese I. Ivans
,
Hendrik Schatz
,
Jennifer S. Sobeck
and
Christopher Sneden
The Astrophysical Journal Letters - Volume: 747, Issue: 1
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Detection of the Second r-process Peak Element Tellurium in Metal-Poor Stars
Volume 7, Issue 7 - article #6
Ian U. Roederer
,
James E. Lawler
,
John J. Cowan
,
Timothy C. Beers
,
Anna Frebel
,
Inese I. Ivans
,
Hendrik Schatz
,
Jennifer S. Sobeck
,
Christopher Sneden
arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Feb
arXiv:1202.2378
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Non-LTE effects on the lead and thorium abundance determinations for cool stars
Volume 7, Issue 7 - article #12
Lyudmila Mashonkina
,
Alexander Ryabtsev
,
Anna Frebel
arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Feb
arXiv:1202.2630
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The Chemical Abundances of Stars in the Halo (CASH) Project. II. A Sample of 14 Extremely Metal-poor Stars
Volume 6, Issue 47 - article #22
Julie K. Hollek
,
Anna Frebel
,
Ian U. Roederer
,
Christopher Sneden
,
Matthew Shetrone
,
Timothy C. Beers
,
Sung-ju Kang
and
Christopher Thom
The Astrophysical Journal - Volume: 742, Issue: 1
Abstract
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Exploring the Universe with Metal-Poor Stars
Volume 6, Issue 34 - article #8
Anna Frebel
(Harvard-Smithsonian Center for Astrophysics)
arXiv.org - Astrophysics - Volume: 2011, Issue: 26 Aug
arXiv:1108.4692
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The Chemical Abundances of Stars in the Halo (CASH) Project. II. A Sample of 16 Extremely Metal-poor Stars
Volume 6, Issue 34 - article #16
Julie K. Hollek
(UTexas),
Anna Frebel
(Harvard/CfA),
Ian U. Roederer
(Carnegie Obs.),
Christopher Sneden
(UTexas),
Matthew Shetrone
(McDonald Obs),
Timothy C. Beers
(Michigan State Univ),
Sung-Ju Kang
(Iowa State Univ),
Christopher Thom
(STScI)
arXiv.org - Astrophysics - Volume: 2011, Issue: 26 Aug
arXiv:1108.4422
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Metal-Poor Stars and the Chemical Enrichment of the Universe
Volume 6, Issue 6 - article #7
Anna Frebel
(Harvard-Smithsonian CfA),
John E. Norris
(Mt. Stromlo Obs., Australian Natl. Univ.)
arXiv.org - Astrophysics - Volume: 2011, Issue: 11 Feb
arXiv:1102.1748
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Stellar Archaeology: New Science with Old Stars
Volume 5, Issue 50 - article #13
Anna Frebel
arXiv.org - Astrophysics - Volume: 2010, Issue: 10 Dec
arXiv:1012.1323
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Dwarf archaeology: Probing the first enrichment events with low-luminosity galaxies
Volume 5, Issue 41 - article #3
Anna Frebel
(CfA),
Volker Bromm
(UT Austin)
arXiv.org - Astrophysics - Volume: 2010, Issue: 8 Oct
arXiv:1010.1261
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An Extremely Carbon-rich, Extremely Metal-poor Star in the Segue 1 System
Volume 5, Issue 40 - article #14
John E. Norris
,
Gerard Gilmore
,
Rosemary F. G. Wyse
,
David Yong
and
Anna Frebel
The Astrophysical Journal Letters - Volume: 722, Issue: 1
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An Extremely Carbon-rich, Extremely Metal-poor Star in the Segue 1 System
Volume 5, Issue 32 - article #1
John E. Norris
,
Gerard Gilmore
,
Rosemary F. G. Wyse
,
David Yong
,
Anna Frebel
arXiv.org - Astrophysics - Volume: 2010, Issue: 6 Aug
arXiv:1008.0450
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Chemical Enrichment in the Faintest Galaxies: the Carbon and Iron Abundance Spreads in the Boötes I Dwarf Spheroidal Galaxy and the Segue 1 System
Volume 5, Issue 32 - article #4
John E. Norris
,
Rosemary F. G. Wyse
,
Gerard Gilmore
,
David Yong
,
Anna Frebel
,
Mark I. Wilkinson
,
V. Belokurov
,
Daniel B. Zucker
arXiv.org - Astrophysics - Volume: 2010, Issue: 6 Aug
arXiv:1008.0137
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The stellar content of the Hamburg/ESO survey VI. The metallicity distribution of main-sequence turnoff stars in the Galactic halo
Volume 5, Issue 26 - article #12
H. N. Li
,
N. Christlieb
,
T. Schörck
,
J. E. Norris
,
M. S. Bessell
,
D. Yong
,
T. C. Beers
,
Y. S. Lee
,
A. Frebel
,
G. Zhao
arXiv.org - Astrophysics - Volume: 2010, Issue: 25 Jun
arXiv:1006.3985
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Stellar Archaeology -- Exploring the Universe with Metal-Poor Stars
Volume 5, Issue 25 - article #9
Anna Frebel
arXiv.org - Astrophysics - Volume: 2010, Issue: 18 Jun
arXiv:1006.2419
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High-resolution Spectroscopy of Extremely Metal-poor Stars in the Least Evolved Galaxies: Leo IV
Volume 5, Issue 22 - article #53
Joshua D. Simon
,
Anna Frebel
,
Andrew McWilliam
,
Evan N. Kirby
,
and
Ian B. Thompson
The Astrophysical Journal - Volume: 716, Issue: 1
Abstract
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Stellar archaeology: Exploring the Universe with metal-poor stars (p 474-488)
Volume 5, Issue 21 - article #25
A. Frebel
Astronomische Nachrichten - Volume: 331, Issue: 5
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