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Results 1 - 73 of 73

$^{11}$B states above the $alpha$-decay threshold studied via $^{10}$B$(d,p){}^{11}$B
- Virtual Journal - Volume 22, Issue 47 - article #7
- A. N. Kuchera, G. Ryan, G. Selby, D. Snider, S. Anderson, S. Almaraz-Calderon, L. T. Baby, B. A. Brown, K. Hanselman, E. Lopez-Saavedra, K. T. Macon, G. W. McCann, K. W. Kemper, M. Spieker, I. Wiedenh"over
- https://arxiv.org/abs/2411.09831
$^{11}mathrm{B}$ states above the $α$-decay threshold via the $^{10}mathrm{B}(d,p)^{11}mathrm{B}$ reaction
- Virtual Journal - Volume 22, Issue 47 - article #15
- A. N. Kuchera, G. Ryan, G. Selby, D. Snider, S. Anderson, S. Almaraz-Calderon, L. T. Baby, B. A. Brown, K. Hanselman, E. Lopez-Saavedra, K. T. Macon, G. W. McCann, K. W. Kemper, M. Spieker,, I. WiedenhÃƒÂ¶ver
- Physical Review C
- http://link.aps.org/doi/10.1103/PhysRevC.110.054319
Single-Neutron Adding on $^{34}$S
- Virtual Journal - Volume 22, Issue 28 - article #10
- A. N. Kuchera, C. R. Hoffman, G. Ryan, I. B. D'Amato, O. M. Guarinello, P. S. Kielb, R. Aggarwal, S. Ajayi, A. L. Conley, I. Conroy, P. D. Cottle, J. C. Esparza, S. Genty, K. Hanselman, M. Heinze, D. Houlihan, B. Kelly, M. I. Khawaja, E. Lopez-Saavedra, G. W. McCann, A. B. Morelock, L. A. Riley, A. Sandrik, V. Sitaraman, M. Spieker, C. Wibisono, I. Wiedenhover
- https://arxiv.org/abs/2407.06030
A Critique of the Spite Plateau, and the Astration of Primordial Lithium. (arXiv:2303.11497v1 [astro-ph.SR])
- Virtual Journal - Volume 21, Issue 12 - article #2
- J. E. Norris, D. Yong, A. Frebel, S. G. Ryan
- http://arxiv.org/abs/2303.11497
Multi-messenger-Athena Synergy White Paper. (arXiv:2110.15677v1 [astro-ph.HE])
- Virtual Journal - Volume 19, Issue 45 - article #5
- L. Piro, M. Ahlers, A. Coleiro, M. Colpi, E. de Oña Wilhelmi, M. Guainazzi, P. G. Jonker, P. Mc Namara, D. A. Nichols, P. O'Brien, E. Troja, J. Vink, J. Aird, L. Amati, S. Anand, E. Bozzo, F. J. Carrera, A. C. Fabian, C. Fryer, E. Hall, O. Korobkin, V. Korol, A. Mangiagli, S. Martínez-Núñez, S. Nissanke, J. Osborne, P. Padovani, E.M. Rossi, G. Ryan, A. Sesana, G. Stratta, N. Tanvir, H. van Eerten
- http://arxiv.org/abs/2110.15677
A tale of two mergers: constraints on kilonova detection in two short GRBs at z$sim$0.5. (arXiv:2012.00026v1 [astro-ph.HE])
- Virtual Journal - Volume 18, Issue 49 - article #2
- B. O'Connor, E. Troja, S. Dichiara, E. A. Chase, G. Ryan, S. B. Cenko, C. L. Fryer, R. Ricci, F. Marshall, C. Kouveliotou, R. T. Wollaeger, C. J. Fontes, O. Korobkin, P. Gatkine, A. Kutyrev, S. Veilleux, N. Kawai, T. Sakamoto
- http://arxiv.org/abs/2012.00026
A thousand days after the merger: continued X-ray emission from GW170817. (arXiv:2006.01150v1 [astro-ph.HE])
- Virtual Journal - Volume 18, Issue 23 - article #2
- E. Troja, H. van Eerten, B. Zhang, G. Ryan, L. Piro, R. Ricci, B. O'Connor, M. H. Wieringa, S. B. Cenko, T. Sakamoto
- http://arxiv.org/abs/2006.01150
A year in the life of GW170817: the rise and fall of a structured jet from a binary neutron star merger. (arXiv:1808.06617v2 [astro-ph.HE] UPDATED)
- Virtual Journal - Volume 17, Issue 28 - article #1
- E. Troja, H. van Eerten, G. Ryan, R. Ricci, J. M. Burgess, M. Wieringa, L. Piro, S. B. Cenko, T. Sakamoto
- http://arxiv.org/abs/1808.06617
A long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations. (arXiv:1810.04664v1 [astro-ph.HE])
- Virtual Journal - Volume 16, Issue 41 - article #1
- L. Piro, E. Troja, B. Zhang, G. Ryan, H. van Eerten, R. Ricci, M. H. Wieringa, A. Tiengo, N. R. Butler, S. B. Cenko, O.D. Fox, H. G. Kandrika, G. Novara, A. Rossi, T. Sakamoto
- http://arxiv.org/abs/1810.04664
A luminous blue kilonova and an off-axis jet from a compact binary merger at z=0.1341. (arXiv:1806.10624v1 [astro-ph.HE])
- Virtual Journal - Volume 16, Issue 26 - article #1
- E. Troja, G. Ryan, L. Piro, H. van Eerten, S. B. Cenko, Y. Yoon, S.-K. Lee, M. Im, T. Sakamoto, P. Gatkine, A. Kutyrev, S. Veilleux
- http://arxiv.org/abs/1806.10624
A three-dimensional hydrodynamical line profile analysis of iron lines and barium isotopes in HD140283
- Virtual Journal - Volume 13, Issue 14 - article #1
- A. J. Gallagher, H.-G. Ludwig, S. G. Ryan, W. Aoki
- arXiv.org - Astrophysics - Volume: 2015, Issue: 10 Apr
- arXiv:1504.02353 [pdf, other]
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
Elemental abundances and classification of carbon-enhanced metal-poor stars
- Virtual Journal - Volume 10, Issue 51 - article #79
- D. M. Allen, S. G. Ryan, S. Rossi, T. C. Beers and S. A. Tsangarides
- Astronomy and Astrophysics - Volume: 548, Issue: December 2012
- http://dx.doi.org/10.1051/0004-6361/201015615
  Abstract | Full HTML | PDF (604.0 KB) | References | Online Material | Tables at CDS | NASA ADS Abstract Service
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]
Elemental abundances and classification of CEMP stars
- Virtual Journal - Volume 10, Issue 42 - article #2
- Dinah M. Allen, Sean G. Ryan, Silvia Rossi, Tim C. Beers, Stelios A. Tsangarides
- arXiv.org - Astrophysics - Volume: 2012, Issue: 19 Oct
- arXiv:1210.5009 [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]
The barium isotopic fractions in five metal-poor stars
- Virtual Journal - Volume 10, Issue 2 - article #10
- A. J. Gallagher, S. G. Ryan, A. Hosford, A. E. Garcia Perez, W. Aoki, S. Honda
- arXiv.org - Astrophysics - Volume: 2012, Issue: 13 Jan
- arXiv:1201.1757 [pdf, other]
Peculiar Type II supernovae from blue supergiants
- Virtual Journal - Volume 9, Issue 28 - article #21
- Io K. W. Kleiser, Dovi Poznanski, Daniel Kasen, Timothy R. Young, Ryan Chornock, Alexei V. Filippenko, Peter Challis, Mohan Ganeshalingam, Robert P. Kirshner, Weidong Li, Thomas Matheson, Peter E. Nugent and Jeffrey M. Silverman
- Monthly Notices of the Royal Astronomical Society - Volume: 415, Issue: 1
- Abstract Full Article (HTML)PDF(15478K)References Request Permissions
The barium isotopic mixture for the metal-poor subgiant star HD140283
- Virtual Journal - Volume 8, Issue 35 - article #18
- A. J. Gallagher, S. G. Ryan, A. E. García Pérez, W. Aoki
- arXiv.org - Astrophysics - Volume: 2010, Issue: 27 Aug
- arXiv:1008.3541 [pdf, ps, other]
Lithium abundances of halo dwarfs based on excitation temperatures. II. NLTE
- Virtual Journal - Volume 8, Issue 15 - article #7
- A. Hosford, A.E. Garcia Perez, R. Collet, S.G. Ryan, J.E. Norris, K.A. Olive
- arXiv.org - Astrophysics - Volume: 2010, Issue: 9 Apr
- arXiv:1004.0863 [pdf, ps, other]
6Li/7Li estimates for metal-poor stars
- Virtual Journal - Volume 7, Issue 40 - article #1
- A.E. Garcia Perez, W. Aoki, S. Inoue, S.G. Ryan, T.K. Suzuki, M. Chiba
- arXiv.org - Astrophysics - Volume: 2009, Issue: 2 Oct
- arXiv:0909.5163 [ps, pdf, other]
⁶Li/⁷Li estimates for metal-poor stars
- Virtual Journal - Volume 7, Issue 37 - article #27
- A. E. García Pérez, W. Aoki, S. Inoue, S. G. Ryan, T. K. Suzuki, and M. Chiba
- Astronomy and Astrophysics - Volume: 504, Issue: 1
- Abstract | Full HTML | PDF file (287.1 KB) | PS file (150.8 KB) | References | Original article
Lithium abundances of halo dwarfs based on excitation temperature - I. Local thermodynamic equilibrium
- Virtual Journal - Volume 7, Issue 3 - article #15
- A. Hosford, S. G. Ryan, A. E. García Pérez, J. E. Norris, and K. A. Olive
- Astronomy and Astrophysics - Volume: 493, Issue: 2
- Abstract | PDF file (247.0 KB) | PS file (114.5 KB)
Lithium abundances of halo dwarfs based on excitation temperature. I. LTE
- Virtual Journal - Volume 6, Issue 47 - article #3
- A. Hosford, S.G. Ryan, A.E. Garcia Perez, J.E. Norris, K.A. Olive
- arXiv.org - Astrophysics - Volume: 2008, Issue: 20 Nov
- arXiv:0811.2506 [ps, pdf, other]
Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turnoff Stars from the SDSS SEGUE Sample
- Virtual Journal - Volume 6, Issue 18 - article #27
- Wako Aoki, Timothy C. Beers, Thirupathi Sivarani, Brian Marsteller, Young Sun Lee, Satoshi Honda, John E. Norris, Sean G. Ryan, and Daniela Carollo
- The Astrophysical Journal - Volume: 678, Issue: 2
- Abstract-Full Text-PDF Version (1131 kB)
Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turn-Off Stars from the SDSS/SEGUE Sample
- Virtual Journal - Volume 6, Issue 5 - article #2
- Wako Aoki, Timothy C. Beers, Thirupathi Sivarani, Brian Marsteller, Young Sun Lee, Satoshi Honda, John E. Norris, Sean G. Ryan, Daniela Carollo
- arXiv.org - Astrophysics - Volume: 2008, Issue: 31 Jan
- arXiv:0801.4187 [ps, pdf, other]
Carbon-enhanced Metal-poor Stars: Osmium and Iridium Abundances in the Neutron-Capture–enhanced Subgiants CS 31062-050 and LP 625-44
- Virtual Journal - Volume 5, Issue 47 - article #3
- Wako Aoki, Sara Bisterzo, Roberto Gallino, Timothy C. Beers, John E. Norris, Sean G. Ryan, and Stelios Tsangarides
- The Astrophysical Journal Letters - Volume: 650, Issue: 2
- ABSTRACT | FULL TEXT WITH ENHANCEMENTS | PDF (324 kB) | PS
Spectroscopic Studies of Extremely Metal-poor Stars with the Subaru High-Dispersion Spectrograph. IV. The α-Elementâ€“Enhanced Metal-poor Star BS 16934-002
- Virtual Journal - Volume 5, Issue 17 - article #5
- Wako Aoki, Satoshi Honda, Timothy C. Beers, Masahide Takada-Hidai, Nobuyuki Iwamoto, Nozomu Tominaga, Hideyuki Umeda, Ken'ichi Nomoto, John E. Norris, and Sean G. Ryan
- The Astrophysical Journal - Volume660, Issue 1
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (319 kB), PS
Carbon-enhanced Metal-poor Stars. I. Chemical Compositions of 26 Stars
- Virtual Journal - Volume 5, Issue 3 - article #2
- Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, and Stelios Tsangarides
- The Astrophysical Journal - Volume655, Issue 1
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (555 kB), PS
Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. IV. The alpha-Element-Enhanced Metal-Poor Star BS16934-002
- Virtual Journal - Volume 5, Issue 2 - article #7
- Wako Aoki, Satoshi Honda, Timothy C. Beers, Masahide Takada-Hidai, Nobuyuki Iwamoto, Nozomu Tominaga, Hideyuki Umeda, Ken'ichi Nomoto, John E. Norris, Sean G. Ryan
- ArXiv - Astrophysics
- astro-ph/0701159 [abs, ps, pdf, other]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 44 - article #29
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 43 - article #27
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 42 - article #21
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 41 - article #38
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
Experimental Mg I oscillator strengths and radiative lifetimes for astrophysical applications on metal-poor stars - New data for the Mg I b triplet
- Virtual Journal - Volume 4, Issue 40 - article #8
- M. Aldenius (1), J.D. Tanner (2), S. Johansson (1), H. Lundberg (3), S.G. Ryan (2 and 4) ((1) Lund Observatory, (2) The Open University, (3) Lund Institute of Technology, (4) University of Hertfordshire)
- ArXiv - Astrophysics
- astro-ph/0610033 [abs, ps, pdf, other]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 40 - article #26
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
- Virtual Journal - Volume 4, Issue 39 - article #11
- Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- ArXiv - Astrophysics
- astro-ph/0609702 [abs, ps, pdf, other]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 39 - article #21
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- Monthly Notices of the Royal Astronomical Society - Volume 372, Issue 372
- Abstract Abstract and References Full Text Article PDF [720KB]
Carbon-Enhanced Metal-Poor Stars. Osmium and Iridium Abundances in the Neutron-Capture-Enhanced Subgiants CS31062-050 and LP625-44
- Virtual Journal - Volume 4, Issue 36 - article #11
- Wako Aoki, Sara Bisterzo, Roberto Gallino, Timothy C. Beers, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- ArXiv - Astrophysics
- astro-ph/0609138 [abs, ps, pdf, other]
A high-resolution spectral analysis of three carbon-enhanced metal-poor stars
- Virtual Journal - Volume 4, Issue 32 - article #12
- Aruna Goswami, Wako Aoki, Timothy C. Beers, Norbert Christlieb, John E. Norris, Sean G. Ryan, Stelios Tsangarides
- ArXiv - Astrophysics
- astro-ph/0608106 [abs, ps, pdf, other]
Neutron-Capture Elements in the Very Metal Poor Star HD 122563
- Virtual Journal - Volume 4, Issue 22 - article #4
- S. Honda, W. Aoki, Y. Ishimaru, S. Wanajo, and S. G. Ryan
- Astrophysical Journal - Volume 643, Issue 2 - June, 2006
- ABSTRACT, FULL TEXT, PDF (344 kB), PS
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
Neutron-capture elements in the very metal-poor star HD122563
- Virtual Journal - Volume 4, Issue 6 - article #12
- S. Honda, W. Aoki, Y. Ishimaru, S. Wanajo, S. G. Ryan
- ArXiv - Astrophysics
- astro-ph/0602107 [abs, ps, pdf, other]
The Origins of Two Classes of Carbon-enhanced, Metal-poor Stars
- Virtual Journal - Volume 3, Issue 49 - article #21
- Sean G. Ryan, Wako Aoki, John E. Norris, and Timothy C. Beers
- The Astrophysical Journal – Vol. 635, Issue 1 – December 2005
- ABSTRACT, FULL TEXT, PDF (140 kB), PS
Spectroscopic Studies of Very Metal-poor Stars with the Subaru High Dispersion Spectrograph. III. Light Neutron-Capture Elements
- Virtual Journal - Volume 3, Issue 39 - article #27
- Wako Aoki, Satoshi Honda, Timothy C. Beers, Toshitaka Kajino, Hiroyasu Ando, John E. Norris, Sean G. Ryan, Hideyuki Izumiura, Kozo Sadakane, and Masahide Takada-Hidai
- Astrophysical Journal – Vol. 632, No. 1 – September 2005
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (491 kB), PS
The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H]=-5.4
- Virtual Journal - Volume 3, Issue 38 - article #9
- A. Frebel, W. Aoki, N. Christlieb, H. Ando, M. Asplund, P.S. Barklem, T. C. Beers, K. Eriksson, C. Fechner, M.Y. Fujimoto, S. Honda, T. Kajino, T. Minezaki, K. Nomoto, J.E. Norris, S.G. Ryan, M. Takada-Hidai, S. Tsangarides, Y. Yoshii
- ArXiv - Astrophysics – September 2005
- astro-ph/0509658 [ abs , ps , pdf , other ]
HE1327-2326, an unevolved star with [Fe/H]<-5.0. I. A Comprehensive Abundance Analysis
- Virtual Journal - Volume 3, Issue 36 - article #6
- 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, T. Kajino
- ArXiv - Astrophysics – September 2005
The Origins of Two Classes of Carbon-Enhanced, Metal-Poor Stars
- Virtual Journal - Volume 3, Issue 34 - article #16
- S. G. Ryan, W. Aoki, J. E. Norris, T.C. Beers
- ArXiv - Astrophysics – August 2005
- astro-ph/0508475 [ abs , ps , pdf , other ]
First enrichment of r -process elements in our Galaxy
- Virtual Journal - Volume 3, Issue 26 - article #97
- Yuhri Ishimaru, Shinya Wanajo, Wako Aoki, Sean G. Ryan and Nikos Prantzos
- Nuclear Physics A – Vol. 758 – July 2005
- Abstract , Abstract + References , PDF (384 K)
The Binary Frequency Among Carbon-enhanced, s -Process rich, Metal-poor Stars
- Virtual Journal - Volume 3, Issue 21 - article #17
- Sara Lucatello, Stelios Tsangarides, Timothy C. Beers, Eugenio Carretta, Raffaele G. Gratton, and Sean G. Ryan
- Astrophysical Journal – Vol. 625, No. 2 – May 2005
- ABSTRACT , FULL TEXT , PDF (126 kB), PS
Nucleosynthetic signatures of the first stars
- Virtual Journal - Volume 3, Issue 15 - article #39
- ANNA FREBEL, WAKO AOKI, NORBERT CHRISTLIEB, HIROYASU ANDO, MARTIN ASPLUND, PAUL S. BARKLEM, TIMOTHY C. BEERS, KJELL ERIKSSON, CORA FECHNER, MASAYUKI Y. FUJIMOTO, SATOSHI HONDA, TOSHITAKA KAJINO, TAKEO MINEZAKI, KEN'ICHI NOMOTO, JOHN E. NORRIS, SEAN G. RYAN, MASAHIDE TAKADA-HIDAI, STELIOS TSANGARIDES & YUZURU YOSHII
- Nature - Vol 434 No 7035 – April 2005
- First paragraph , Full text , PDF (181k), N&V
Spectroscopic Studies of Very Metal-Poor Stars with the Subaru High Dispersion Spectrograph. III. Light Neutron-Capture Elements
- Virtual Journal - Volume 3, Issue 9 - article #7
- Wako Aoki, Satoshi Honda, Timothy C. Beers, Toshitaka Kajino, Hiroyasu Ando, John E. Norris, Sean G. Ryan, Hideyuki Izumiura, Kozo Sadakane, Masahide Takada-Hidai
- arXiv - Astrophysics – March 2005
- astro-ph/0503032 [ abs , ps , pdf , other ]
Nucleosynthetic signatures of the first stars
- Virtual Journal - Volume 3, Issue 9 - article #10
- Anna Frebel, Wako Aoki, Norbert Christlieb, Hiroyasu Ando, Martin Asplund, Paul S. Barklem, Timothy C. Beers, Kjell Eriksson, Cora Fechner, Masayuki Y. Fujimoto, Satoshi Honda, Toshitaka Kajino, Takeo Minezaki, Ken`ichi Nomoto, John E. Norris, Sean G. Ryan, Masahide Takada-Hidai, Stelios Tsangarides, Yuzuru Yoshii
- arXiv - Astrophysics – March 2005
- astro-ph/0503021 [ abs , ps , pdf , other ]
Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing
- Virtual Journal - Volume 3, Issue 3 - article #13
- E. Arnone, S. G. Ryan, D. Argast, J. E. Norris and T. C. Beers
- Astronomy and Astrophysics – Vol 430, No 2 – January 2005
- Abstract , PDF file (316 KB) , PS file (103 KB)
The Binary Frequency Among Carbon-Enhanced, s-Process Rich, Metal-Poor Stars
- Virtual Journal - Volume 2, Issue 50 - article #5
- Sara Lucatello (1,2), Stelios Tsangarides (3), Timothy C. Beers (4), Eugenio Carretta (1,5), Raffaele G. Gratton (1), Sean G. Ryan (3) (1-INAF, Osservatorio Astronomico di Padova; 2- Dipartimento di Astronomia, Padova University; 3-The Open University; 4- MSU, 5-INAF, Osservatorio Astronomico di Bologna)
- arXiv - Astrophysics – December 2004
- astro-ph/0412422 [ abs , ps , pdf , other ]
On the Binarity of Carbon-Enhanced, Metal-Poor Stars
- Virtual Journal - Volume 2, Issue 49 - article #8
- S. Tsangarides (1), S. G. Ryan (1), T. C. Beers (2) ((1) The Open University, Milton Keynes, UK, (2) Michigan State University and JINA, East Lansing, USA)
- arXiv - Astrophysics – December 2004
- astro-ph/0412160 [ 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)
On the binarity of carbon-enhanced, metal-poor stars
- Virtual Journal - Volume 2, Issue 48 - article #89
- S. Tsangarides, S. G. Ryan, T. C. Beers
- PDF file
A low upper-limit on the lithium isotope ratio in HD140283
- Virtual Journal - Volume 2, Issue 47 - article #26
- W. Aoki, S. Inoue, S. Kawanomoto, S. G. Ryan, I. M. Smith, T. K. Suzuki and M. Takada-Hidai
- Astronomy and Astrophysics – Vol 428, No 2 – November 2004
- Abstract , PDF file (244 KB) , PS file (82.1 KB)
The Halo Lithium Plateau: Outstanding Issues
- Virtual Journal - Volume 2, Issue 42 - article #5
- Sean G. Ryan, Lisa Elliott
- arXiv - Astrophysics – October 2004
- astro-ph/0410472 [ abs , ps , pdf , other ]
A low upper-limit on the lithium isotope ratio in HD140283
- Virtual Journal - Volume 2, Issue 39 - article #13
- Wako Aoki, Susumu Inoue, Satoshi Kawanomoto, Sean G. Ryan, Iain M. Smith, Takeru K. Suzuki, Masahide Takada-Hidai
- arXiv - Astrophysics – October 2004
- astro-ph/0409745 [ 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 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 ]
Oxygen Overabundance in the Extremely Iron-poor Star CS 29498-043
- Virtual Journal - Volume 2, Issue 23 - article #41
- Wako Aoki, John E. Norris, Sean G. Ryan, Timothy C. Beers, Norbert Christlieb, Stelios Tsangarides, and Hiroyasu Ando
- Astrophysical Journal – Volume 608 Number 1 – June 2004
- ABSTRACT , FULL TEXT WITH ENHANCEMENTS , PDF (179 kB), PS
Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. I. Observational Data
- Virtual Journal - Volume 2, Issue 16 - article #20
- Satoshi Honda, Wako Aoki, Hiroyasu Ando, Hideyuki Izumiura, Toshitaka Kajino, Eiji Kambe, Satoshi Kawanomoto, Kunio Noguchi, Kiichi Okita, Kozo Sadakane, Bun'ei Sato, Masahide Takada-Hidai, Yoichi Takeda, Etsuji Watanabe, Timothy C. Beers, John E. Norris, and Sean G. Ryan
- The Astrophysical Journal Supplement Series - Volume 152, Number 1
- ABSTRACT , FULL TEXT , PDF (770 kB), PS
Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043
- Virtual Journal - Volume 2, Issue 8 - article #8
- Wako Aoki, John E. Norris, Sean G. Ryan, Timothy C. Beers, Norbert Christlieb, Stelios Tsangarides, Hiroyasu Ando
- arXiv.org – Astrophysics – February 2004
- astro-ph/0402585 [ abs , ps , pdf , other ]
Spectroscopic Studies of Extremely Metal-Poor Stars with Subaru/HDS:I. Observational Data
- Virtual Journal - Volume 2, Issue 6 - article #7
- S. Honda, W. Aoki, H. Ando, H. Izumiura, T. Kajino, E. Kambe, S. Kawanomoto, K. Noguchi, K. Okita, K. Sadakane, B. Sato, M. Takada-Hidai, Y. Takeda, E. Watanabe, T.C. Beers, J.E. Norris, S.G. Ryan
- arXiv.org – Astrophysics – February 2004
- astro-ph/0402291 [ abs , ps , pdf , other ]
The Detection of Low Eu Abundances in Extremely Metal-poor Stars and the Origin of r -Process Elements
- Virtual Journal - Volume 2, Issue 1 - article #31
- Yuhri Ishimaru, Shinya Wanajo, Wako Aoki, and Sean G. Ryan
- The Astrophysical Journal Letters - Volume 600, Number 1, Part 2
- ABSTRACT , FULL TEXT , PDF (216kb), PS
Europium Isotope Ratios in s -Process Element enhanced Metal-poor Stars: A New Probe of the ¹⁵¹Sm Branching
- Virtual Journal - Volume 1, Issue 3 - article #14
- Wako Aoki, Sean G. Ryan, Nobuyuki Iwamoto,Timothy, C. Beers, John E. Norris, Hiroyasu Ando,Toshitaka, Kajino, Grant J. Mathews, and Masayuki Y. Fujimoto
- The Astrophysical Journal Letters, Volume 592, Number 2, Part 2
- ABSTRACT , FULL TEXT , PDF (86kb), PS

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