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Results 1 - 42 of 42

Iron-peak Element Abundances in Warm Very Metal-poor Stars
- Volume 18, Issue 31 - article #7
- Christopher Sneden, Ann Merchant Boesgaard, John J. Cowan, Ian U. Roederer, Elizabeth A. Den Hartog, James E. Lawler
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/accd62
The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks. (arXiv:2210.15105v1 [astro-ph.SR])
- Volume 17, Issue 42 - article #2
- Ian U. Roederer, John J. Cowan, Marco Pignatari, Timothy C. Beers, Elizabeth A. Den Hartog, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Matthew R. Mumpower, Vinicius M. Placco, Charli M. Sakari, Rebecca Surman, Nicole Vassh
- http://arxiv.org/abs/2210.15105
The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks
- Volume 17, Issue 34 - article #7
- Ian U. Roederer, John J. Cowan, Marco Pignatari, Timothy C. Beers, Elizabeth A. Den Hartog, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Matthew R. Mumpower
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ac85bc
Origin of the heaviest elements: The rapid neutron-capture process
- Volume 16, Issue 6 - article #14
- John J. Cowan, Christopher Sneden, James E. Lawler, Ani Aprahamian, Michael Wiescher, Karlheinz Langanke, Gabriel MartÃƒÂnez-Pinedo,, Friedrich-Karl Thielemann
- Reviews of Modern Physics
- http://link.aps.org/doi/10.1103/RevModPhys.93.015002
Vanadium Abundance Derivations in 255 Metal-poor Stars
- Volume 15, Issue 37 - article #16
- Xiaowei Ou, Ian U. Roederer, Christopher Sneden, John J. Cowan, James E. Lawler, Stephen A. Shectman,, Ian B. Thompson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/900/2/106
Origin of the Heaviest Elements: the Rapid Neutron-Capture Process. (arXiv:1901.01410v2 [astro-ph.HE] UPDATED)
- Volume 15, Issue 18 - article #3
- John J. Cowan, Christopher Sneden, James E. Lawler, Ani Aprahamian, Michael Wiescher, Karlheinz Langanke, Gabriel Martínez-Pinedo, Friedrich-Karl Thielemann
- http://arxiv.org/abs/1901.01410
Detailed Iron-peak Element Abundances in Three Very Metal-poor Stars
- Volume 15, Issue 8 - article #7
- John J. Cowan, Christopher Sneden, Ian U. Roederer, James E. Lawler, Elizabeth A. Den Hartog, Jennifer S. Sobeck,, Ann Merchant Boesgaard
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/890/2/119
Detailed Iron-Peak Element Abundances in Three Very Metal-Poor Stars. (arXiv:2001.00541v1 [astro-ph.SR])
- Volume 15, Issue 1 - article #1
- John J. Cowan, Christopher Sneden, Ian U. Roederer, James E. Lawler, Elizabeth A. Den Hartog, Jennifer S. Sobeck, Ann Merchant Boesgaard
- http://arxiv.org/abs/2001.00541
The R -Process Alliance: Discovery of a Low- α , r -process-enhanced Metal-poor Star in the Galactic Halo
- Volume 14, Issue 14 - article #19
- Charli M. Sakari, Ian U. Roederer, Vinicius M. Placco, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese Hansen, Christopher Sneden, John J. Cowan, George Wallerstein, Elizabeth M. Farrell, Kim A. Venn, Gal MatijeviÃ„Â, Rosemary F. G. Wyse, Joss Bland-Hawthorn, Cristina Chiappini, Kenneth C. Freeman, Brad K. Gibson, Eva K. Grebel, Amina Helmi, Georges Kordopatis, Andrea Kunder, Julio Navarro, Warren Reid, George Seabroke, Matthias Steinmetz,, Fred Watson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/874/2/148
The R-Process Alliance: Discovery of a low-alpha, r-Process-Enhanced Metal-Poor Star in the Galactic Halo. (arXiv:1903.01480v1 [astro-ph.SR])
- Volume 14, Issue 10 - article #12
- Charli M. Sakari, Ian U. Roederer, Vinicius M. Placco, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese Hansen, Christopher Sneden, John J. Cowan, George Wallerstein, Elizabeth M. Farrell, Kim A. Venn, Gal Matijevic, Rosemary F.G. Wyse, Joss Bland-Hawthorn, Cristina Chiappini, Kenneth C. Freeman, Brad K. Gibson, Eva K. Grebel, Amina Helmi, Georges Kordopatis, Andrea Kunder, Julio Navarro, Warren Reid, George Seabroke, Matthias Steinmetz, Fred Watson
- http://arxiv.org/abs/1903.01480
The R -Process Alliance: 2MASS J09544277+5246414, the Most Actinide-enhanced R -II Star Known
- Volume 13, Issue 23 - article #7
- Erika M. Holmbeck, Timothy C. Beers, Ian U. Roederer, Vinicius M. Placco, Terese T. Hansen, Charli M. Sakari, Christopher Sneden, Chao Liu, Young Sun Lee, John J. Cowan,, Anna Frebel
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/859/2/L24
The R-Process Alliance: 2MASS J09544277+5246414, the Most Actinide-Enhanced R-II Star Known. (arXiv:1805.11925v1 [astro-ph.SR])
- Volume 13, Issue 22 - article #7
- Erika M. Holmbeck, Timothy C. Beers, Ian U. Roederer, Vinicius M. Placco, Terese T. Hansen, Charli M. Sakari, Christopher Sneden, Chao Liu, Young Sun Lee, John J. Cowan, Anna Frebel
- http://arxiv.org/abs/1805.11925
Iron-group Abundances in the Metal-poor Main-Sequence Turnoff Star HD~84937
- Volume 11, Issue 6 - article #21
- Christopher Sneden, John J. Cowan, Chiaki Kobayashi, Marco Pignatari, James E. Lawler, Elizabeth A. Den Hartog, and Michael P. Wood
- The Astrophysical Journal - Volume: 817, Issue: 1
- View article PDF (1.79 MB)
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 [pdf, ps, other]
Nine new metal-poor stars on the subgiant and red horizontal branches with high levels of r-process enhancement
- Volume 9, Issue 24 - article #53
- Ian U. Roederer, John J. Cowan, George W. Preston, Stephen A. Shectman, Christopher Sneden, and Ian B. Thompson
- Monthly Notices of the Royal Astronomical Society - Volume: 445, Issue: 3
- Abstract Full Text (HTML) Full Text (PDF)
Nine New Metal-Poor Stars on the Subgiant and Red Horizontal Branches with High Levels of r-process Enhancement
- Volume 9, Issue 22 - article #34
- Ian U. Roederer (U. Michigan), John J. Cowan (U. Oklahoma), George W. Preston, Stephen A. Shectman (Carnegie Observatories), Chris Sneden (U. Texas), Ian B. Thompson (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 26 Sep
- arXiv:1409.5810 [pdf, ps, other]
Hubble Space Telescope Near-ultraviolet Spectroscopy of the Bright CEMP-no Star BD+44Â°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 [pdf, ps, other]
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
- Abstract References Cited by Full text PDF (2.07 MB) HTML with Enhancements
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 [pdf, ps, other]
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
- Abstract References Full text PDF (258 KB) View as HTML
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 [pdf, ps, other]
r-Process Abundance Signatures in Metal-Poor Halo Stars
- Volume 6, Issue 23 - article #4
- John J. Cowan, Ian U. Roederer, Christopher Sneden, James E. Lawler
- arXiv.org - Astrophysics - Volume: 2011, Issue: 10 Jun
- arXiv:1106.1109 [pdf, ps, other]
The Abundances of Neutron-capture Species in the Very Metal-poor Globular Cluster M15: A Uniform Analysis of Red Giant Branch and Red Horizontal Branch Stars
- Volume 6, Issue 23 - article #18
- Jennifer S. Sobeck, Robert P. Kraft, Christopher Sneden, George W. Preston, John J. Cowan, Graeme H. Smith, Ian B. Thompson, Stephen A. Shectman and Gregory S. Burley
- Astronomical Journal - Volume: 141, Issue: 6
- doi: 10.1088/0004-6256/141/6/175 Tag this article
New Abundance Determinations of Cadmium, Lutetium, and Osmium in the r-process Enriched Star BD+173248
- Volume 5, Issue 13 - article #11
- Ian U. Roederer, Christopher Sneden, James E. Lawler, John J. Cowan
- arXiv.org - Astrophysics - Volume: 2010, Issue: 26 Mar
- arXiv:1003.4522 [pdf, ps, other]
The End of Nucleosynthesis: Production of Lead and Thorium in the Early Galaxy
- Volume 4, Issue 24 - article #21
- <em >Ian U. Roederer, Karl-Ludwig Kratz, Anna Frebel, Norbert Christlieb, Bernd Pfeiffer, John J. Cowan, and Christopher Sneden</em&gt,
- The Astrophysical Journal - Volume: 698, Issue: 2
- Abstract | References
New Rare Earth Element Abundance Distributions for the Sun and Five r-Process-Rich Very Metal-Poor Stars
- Volume 4, Issue 19 - article #32
- <em >Christopher Sneden, James E. Lawler, John J. Cowan, Inese I. Ivans, and Elizabeth A. Den Hartog</em&gt,
- The Astrophysical Journal Supplement - Volume: 182, Issue: 1
- Abstract | References
The End of Nucleosynthesis: Production of Lead and Thorium in the Early Galaxy
- Volume 4, Issue 17 - article #5
- Ian U. Roederer (University of Texas), Karl-Ludwig Kratz (Max-Planck-Institut fur Chemie), Anna Frebel (Harvard-Smithsonian Center for Astrophysics), Norbert Christlieb (Zentrum fur Astronomie der Universitat Heidelberg), Bernd Pfeiffer (Max-Planck-Institut fur Chemie), John J. Cowan (University of Oklahoma), Christopher Sneden (University of Texas)
- arXiv.org - Astrophysics - Volume: 2009, Issue: 24 Apr
- arXiv:0904.3105 [ps, pdf, other]
New Rare Earth Element Abundance Distributions for the Sun and Five r-Process-Rich Very Metal-Poor Stars
- Volume 4, Issue 11 - article #10
- Christopher Sneden, James E. Lawler, John J. Cowan, Inese I. Ivans, Elizabeth A. Den Hartog
- arXiv.org - Astrophysics - Volume: 2009, Issue: 13 Mar
- arXiv:0903.1623 [ps, pdf, other]
Neutron-Capture Elements in the Early Galaxy
- Volume 3, Issue 34 - article #1
- Christopher Sneden, John J. Cowan, Roberto Gallino
- Annual Review of Astronomy and Astrophysics - Volume: 46, Issue: 1
- Abstract | Full Text | PDF (1241 KB)
The Hobby-Eberly Telescope Chemical Abundances of Stars in the Halo (CASH) Project. I. The Lithium-, s-, and r-enhanced Metal-poor Giant HKII 17435−00532
- Volume 3, Issue 23 - article #33
- Ian U. Roederer, Anna Frebel, Matthew D. Shetrone, Carlos Allende Prieto, Jaehyon Rhee, Roberto Gallino, Sara Bisterzo, Christopher Sneden, Timothy C. Beers, and John J. Cowan
- The Astrophysical Journal - Volume: 679, Issue: 2
- Abstract-Full Text with Enhancements-PDF Version (958 kB)
Europium, Samarium, and Neodymium Isotopic Fractions in Metal‐Poor Stars
- Volume 3, Issue 9 - article #2
- Ian U. Roederer, James E. Lawler, Christopher Sneden, John J. Cowan, Jennifer S. Sobeck, and Catherine A. Pilachowski
- The Astrophysical Journal - Volume: 675, Issue: 1
- Abstract-Full Text with Enhancements-PDF Version (834 kB)
The Hobby-Eberly Telescope "Chemical Abundances of Stars in the Halo" (CASH) Project. I. The Lithium-, s-, and r-Enhanced Metal-Poor Giant HKII 17435-00532
- Volume 3, Issue 9 - article #11
- Ian U. Roederer, Anna Frebel, Matthew D. Shetrone, Carlos Allende Prieto, Jaehyon Rhee, Roberto Gallino, Sara Bisterzo, Christopher Sneden, Timothy C. Beers, John J. Cowan
- arXiv.org - Astrophysics - Volume: 2008, Issue: 28 Feb
- arXiv:0802.3701 [ps, pdf, other]
Europium, Samarium, and Neodymium Isotopic Fractions in Metal-Poor Stars
- Volume 2, Issue 51 - article #14
- Ian U. Roederer, James E. Lawler, Christopher Sneden, John J. Cowan, Jennifer S. Sobeck, Catherine A. Pilachowski
- arXiv.org - Astrophysics - Volume: 2007, Issue: 20 Dec
- arXiv:0712.2473 [ps, pdf, other]
Explorations of the r-Processes: Comparisons between Calculations and Observations of Low-Metallicity Stars
- Volume 2, Issue 23 - article #5
- Karl-Ludwig Kratz, Khalil Farouqi, Bernd Pfeiffer, James W. Truran, Christopher Sneden, and John J. Cowan
- The Astrophysical Journal - Volume662, Issue 1
- ABSTRACT, FULL TEXT, PDF (542 kB), PS
Explorations of the r-Processes: Comparisons between Calculations and Observations of Low-Metallicity Stars
- Volume 2, Issue 10 - article #1
- Karl-Ludwig Kratz, Khalil Farouqi, Bernd Pfeiffer, James W. Truran, Christopher Sneden, John J. Cowan
- ArXiv - Astrophysics
- astro-ph/0703091 [abs, ps, pdf, other]
In Memory of Al Cameron
- Volume 1, Issue 44 - article #3
- John J. Cowan, James W. Truran
- ArXiv - Astrophysics
- astro-ph/0611824 [abs, ps, pdf, other]
Near-Ultraviolet Observations of HD 221170: New Insights into the Nature of r-Process–rich Stars
- Volume 1, Issue 23 - article #3
- Inese I. Ivans, Jennifer Simmerer, Christopher Sneden, James E. Lawler, John J. Cowan, Roberto Gallino, and Sara Bisterzo
- The Astrophysical Journal - Volume645, Issue 1
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (761 kB), PS
Nucleosynthesis: Stellar and Solar Abundances and Atomic Data
- Volume 1, Issue 16 - article #14
- John J. Cowan, James E. Lawler, Christopher Sneden, E. A. Den Hartog, Jason Collier
- ArXiv - Astrophysics
- astro-ph/0605137 [abs, ps, pdf, other]
Heavy element synthesis in the oldest stars and the early Universe
- Volume 1, Issue 14 - article #48
- John J. Cowan and Christopher Sneden
- Nature - Volume 440, Issue 7088
- Abstract, Full Text, PDF (543K)
Near-UV Observations of HD221170: New Insights into the Nature of r-Process-Rich Stars
- Volume 1, Issue 12 - article #7
- Inese I. Ivans, Jennifer Simmerer, Christopher Sneden, James E. Lawler, John J. Cowan, Roberto Gallino, Sara Bisterzo
- ArXiv - Astrophysics
- astro-ph/0604180 [abs, ps, pdf, other]

Results 1 - 42 of 42

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