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Results 1 - 32 of 32

The molecular chemistry of Type Ibc supernovae, and diagnostic potential with the James Webb Space Telescope. (arXiv:2203.07021v1 [astro-ph.SR])
- Virtual Journal - Volume 20, Issue 11 - article #9
- S. Liljegren, A. Jerkstrand, P. S. Barklem, G. Nyman, R. Brady, S. N. Yurchenko
- http://arxiv.org/abs/2203.07021
3D non-LTE line formation of neutral carbon in the Sun. (arXiv:1903.08838v1 [astro-ph.SR])
- Virtual Journal - Volume 17, Issue 12 - article #1
- A. M. Amarsi, P. S. Barklem, R. Collet, N. Grevesse, M. Asplund
- http://arxiv.org/abs/1903.08838
Carbon and oxygen in metal-poor halo starsâ‹†
- Virtual Journal - Volume 17, Issue 5 - article #5
- A. M. Amarsi, P. E. Nissen, M. Asplund, K. Lind, P. S. Barklem
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/QTipYx6aF8Y/201834480
Non-LTE line formation of Fe in late-type stars - III. 3D non-LTE analysis of metal-poor stars. (arXiv:1608.06390v1 [astro-ph.SR])
- Virtual Journal - Volume 14, Issue 35 - article #11
- A. M. Amarsi, K. Lind, M. Asplund, P. S. Barklem, R. Collet
- http://arxiv.org/abs/1608.06390
Atomic diffusion and mixing in old stars - IV. Weak abundance trends in the globular cluster NGC 6752
- Virtual Journal - Volume 11, Issue 29 - article #28
- P. Gruyters, A. J. Korn, O. Richard, F. Grundahl, R. Collet, L. I. Mashonkina, Y. Osorio and P. S. Barklem
- Astronomy and Astrophysics - Volume: 555, Issue: July 2013
- http://dx.doi.org/10.1051/0004-6361/201220821
  Abstract Full HTML PDF (831.8 KB) References Online Material NASA ADS Abstract Service
The Most Metal-poor Stars. I. Discovery, Data, and Atmospheric Parameters
- Virtual Journal - Volume 10, Issue 52 - article #50
- 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
- Abstract References Cited by Full text PDF (1.31 MB) Enhanced article HTML
The Most Metal-poor Stars. II. Chemical Abundances of 190 Metal-poor Stars Including 10 New Stars with [Fe/H] ≤ â€“3.5
- Virtual Journal - Volume 10, Issue 52 - article #51
- 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 References Cited by Full text PDF (7.30 MB) Enhanced article HTML
The Most Metal-poor Stars. III. The Metallicity Distribution Function and Carbon-enhanced Metal-poor Fraction
- Virtual Journal - Volume 10, Issue 52 - article #52
- 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 References Full text PDF (724 KB) Enhanced article HTML
The Most Metal-poor Stars. IV. The Two Populations with [Fe/H] lesssim â€“3.0
- Virtual Journal - Volume 10, Issue 52 - article #53
- 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
- Abstract References Cited by Full text PDF (1.13 MB) Enhanced article HTML
The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0
- Virtual Journal - Volume 10, Issue 46 - article #11
- 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 [pdf, ps, other]
The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters
- Virtual Journal - Volume 10, Issue 33 - article #11
- 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 [pdf, ps, other]
The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5
- Virtual Journal - Volume 10, Issue 33 - article #12
- 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 [pdf, ps, other]
The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction
- Virtual Journal - Volume 10, 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:1208.3016 [pdf, ps, other]
Precise Effective Temperatures of Solar Analog Stars
- Virtual Journal - Volume 10, Issue 23 - article #8
- D. Cornejo, I. Ramirez, P. S. Barklem
- arXiv.org - Astrophysics - Volume: 2012, Issue: 8 Jun
- arXiv:1206.0750 [pdf, ps, other]
The Hamburg/ESO R-process Enhanced Star survey (HERES) VI. The Galactic Chemical Evolution of Silicon
- Virtual Journal - Volume 8, Issue 26 - article #24
- L. Zhang, N. Christlieb, A. J. Korn, P. S. Barklem, T. Karlsson, G. Zhao
- arXiv.org - Astrophysics - Volume: 2010, Issue: 25 Jun
- arXiv:1006.3594 [pdf, ps, other]
The stellar content of the Hamburg/ESO survey - V. The metallicity distribution function of the Galactic halo
- Virtual Journal - Volume 7, Issue 47 - article #27
- T. Schörck, N. Christlieb, J. G. Cohen, T. C. Beers, S. Shectman, I. Thompson, A. McWilliam, M. S. Bessell, J. E. Norris, J. Meléndez, S. Ramírez, D. Haynes, P. Cass, M. Hartley, K. Russell, F. Watson, F.-J. Zickgraf, B. Behnke, C. Fechner, B. Fuhrmeister, P. S. Barklem, B. Edvardsson, A. Frebel, L. Wisotzki, and D. Reimers
- Astronomy and Astrophysics - Volume: 507, Issue: 2
- Abstract | PDF file (506.8 KB) | PS file (331.7 KB)
The Hamburg/ESO R-process enhanced star survey (HERES) - IV. Detailed abundance analysis and age dating of the strongly r-process enhanced stars CS 29491–069 and HE 1219–0312
- Virtual Journal - Volume 7, Issue 38 - article #20
- W. Hayek, U. Wiesendahl, N. Christlieb, K. Eriksson, A. J. Korn, P. S. Barklem, V. Hill, T. C. Beers, K. Farouqi, B. Pfeiffer, and K.-L. Kratz
- Astronomy and Astrophysics - Volume: 504, Issue: 2
- Abstract | PDF file (381.6 KB) | PS file (295.9 KB)
Neutral oxygen spectral line formation revisited with new collisional data: large departures from LTE at low metallicity
- Virtual Journal - Volume 7, Issue 27 - article #29
- D. Fabbian, M. Asplund, P. S. Barklem, M. Carlsson, and D. Kiselman
- Astronomy and Astrophysics - Volume: 500, Issue: 3
- Abstract | PDF file (381.7 KB) | PS file (207.6 KB)
Atomic diffusion and mixing in old stars - II. Observations of stars in the globular cluster NGC 6397 with VLT/FLAMES-GIRAFFE
- Virtual Journal - Volume 6, Issue 42 - article #17
- K. Lind, A. J. Korn, P. S. Barklem, and F. Grundahl
- Astronomy and Astrophysics - Volume: 490, Issue: 2
- Abstract | PDF file (704.8 KB) | PS file (2.570 MB)
A probable stellar solution to the cosmological lithium discrepancy
- Virtual Journal - Volume 4, Issue 32 - article #32
- A. J. Korn, F. Grundahl, O. Richard, P. S. Barklem, L. Mashonkina, R. Collet, N. Piskunov and B. Gustafsson
- Nature - Volume 442, Issue 7103
- First paragraph, Full Text, PDF (142K), Supplementary informationSee also: Editor's summary
The Hamburg/ESO R-process enhanced star survey (HERES) - III. HE 0338-3945 and the formation of the r + s stars
- Virtual Journal - Volume 4, Issue 18 - article #23
- K. Jonsell, P. S. Barklem, B. Gustafsson, N. Christlieb, V. Hill, T. C. Beers and J. Holmberg
- Astronomy and Astrophysics - Volume 451, Issue 2 - May, 2006
- Abstract, Full HTML, PDF file (410 KB), PS file (164 KB), References
HE 1327-2326, an Unevolved Star with [Fe/H] < -5.0. I. A Comprehensive Abundance Analysis
- Virtual Journal - Volume 4, Issue 10 - article #1
- W. Aoki, A. Frebel, N. Christlieb, J. E. Norris, T. C. Beers, T. Minezaki, P. S. Barklem, S. Honda, M. Takada-Hidai, M. Asplund, S. G. Ryan, S. Tsangarides, K. Eriksson, A. Steinhauer, C. P. Deliyannis, K. Nomoto, M. Y. Fujimoto, H. Ando, Y. Yoshii, and T. Kajino
- ABSTRACT , FULL TEXT , PDF (604 kB) , PS
The Hamburg/ESO R-process Enhanced Star survey (HERES) III. HE 0338-3945 and the formation of the r+s stars
- Virtual Journal - Volume 4, Issue 4 - article #26
- K. Jonsell (1), P. S. Barklem (1), B. Gustafsson (1), N. Christlieb (2), V. Hill (3), T. C. Beers (4), J. Holmberg (5) ((1) Uppsala, (2) Hamburg, (3) Paris Meudon, (4) Michigan State, (5) Tuorla)
- ArXiv - Astrophysics
- astro-ph/0601476 [abs, ps, pdf, other] :
The Hamburg/ESO R-process enhanced star survey (HERES) - II. Spectroscopic analysis of the survey sample
- Virtual Journal - Volume 3, Issue 30 - article #22
- P. S. Barklem, N. Christlieb, T. C. Beers, V. Hill, M. S. Bessell, J. Holmberg, B. Marsteller, S. Rossi, F.-J. Zickgraf and D. Reimers
- Astronomy and Astrophysics - Vol. 439 No. 1 – July 2005
- Abstract , Full HTML , PDF file (2.26 MB) , PS file (532 KB) , References , Online Material
The Hamburg/ESO R-process Enhanced Star survey (HERES) II. Spectroscopic analysis of the survey sample
- Virtual Journal - Volume 3, Issue 18 - article #10
- P. S. Barklem (Uppsala), N. Christlieb (Hamburg), T. C. Beers (Michigan State), V. Hill (Paris Meudon), J. Holmberg (Tuorla), B. Marsteller (Michigan State), S. Rossi (Sao Paulo), F.-J. Zickgraf (Hamburg)
- arXiv – Astrophysics – May 2005
- astro-ph/0505050 [ abs , ps , pdf , other ]
The Hamburg/ESO R-process Enhanced Star survey (HERES) - I. Project description, and discovery of two stars with strong enhancements of neutron-capture elements
- Virtual Journal - Volume 2, Issue 49 - article #32
- N. Christlieb, T. C. Beers, P. S. Barklem, M. Bessell, V. Hill, J. Holmberg, A. J. Korn, B. Marsteller, L. Mashonkina, Y.-Z. Qian, S. Rossi, G. J. Wasserburg, F.-J. Zickgraf, K.-L. Kratz, B. NordstrÃ¶m, B. Pfeiffer, J. Rhee and S. G. Ryan
- Astronomy and Astrophysics – Vol 428, No 3 – December 2004
- Abstract , PDF file (306 KB) , PS file (112 KB)
The Hamburg/ESO R-process Enhanced Star survey (HERES). I. Project description, and discovery of two stars with strong enhancements of neutron-capture elements
- Virtual Journal - Volume 2, Issue 34 - article #22
- N. Christlieb, T. C. Beers, P. S. Barklem, M. Bessell, V. Hill, J. Holmberg, A.J. Korn, B. Marsteller, L. Mashonkina, Y.-Z. Qian, S. Rossi, G.J. Wasserburg, F.-J. Zickgraf, K.-L. Kratz, B. Nordstr{Ã¶}m, B. Pfeiffer, J. Rhee, S.G. Ryan
- arXiv - Astrophysics - August 2004
- astro-ph/0408389 [ abs , ps , pdf , other ]
HE 0107-5240, a Chemically Ancient Star. I. A Detailed Abundance Analysis
- Virtual Journal - Volume 2, Issue 10 - article #37
- N. Christlieb, B. Gustafsson, A. J. Korn, P. S. Barklem, T. C. Beers, M. S. Bessell, T. Karlsson, and M. Mizuno-Wiedner
- The Astrophysical Journal - Volume 603, Number 2, Part 1
- ABSTRACT , FULL TEXT , PDF (757 kB), PS
HE0107-5240, A Chemically Ancient Star.I. A Detailed Abundance Analysis
- Virtual Journal - Volume 1, Issue 18 - article #23
- N. Christlieb(Uppsala Astronomical Observatory and Hamburger Sternwarte), B. Gustafsson(Uppsala Astronomical Observatory), A. J. Korn(Universitaets-Sternwarte Muenchen and Uppsala Astronomical Observatory), P. S. Barklem(Uppsala Astronomical Observatory),T. C. Beers(Department of Physics and Astronomy, Michigan State University), M. S. Bessell(Research School of Astronomy and Astrophysics, Australian National University),T. Karlsson, M. Mizuno-Wiedner (Uppsala Astronomical Observatory)
- arXiv.org - Astrophysics - Mon, 10 Nov 2003
- astro-ph/0311173 [ abs , ps , pdf , other ]
Inelastic H+Li and H ^- +Li ⁺ collisions and non-LTE Li I line formation in stellar atmospheres
- Virtual Journal - Volume 1, Issue 11 - article #39
- P. S. Barklem, A. K. Belyaev and M. Asplund
- Astronomy and Astrophysics - Vol. 409 No. 2
- Abstract , Full HTML, PDF file (100 KB) , PS file (235 KB)
Collisional depolarization and transfer rates of spectral lines by atomic hydrogen - II. Application to d states of neutral atoms
- Virtual Journal - Volume 1, Issue 10 - article #34
- M. Derouich, S. Sahal-BrÃƒÂ©chot and P. S. Barklem
- Astronomy and Astrophysics - Vol. 409 No. 1
- Abstract , Full HTML, PDF file (199 KB) , PS file (95.7 KB)
Inelastic H+Li and H^-+Li^+ collisions and non-LTE Li I line formation in stellar atmospheres
- Virtual Journal - Volume 1, Issue 5 - article #9
- P. S. Barklem(Uppsala), A.K. Belyaev(A.I.Herzen), M. Asplund(RSAA)
- arXiv.org - Astrophysics - Tue, 12 Aug 2003
- astro-ph/0308170 [ abs , ps , pdf , other ]

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