Item Type No Grouping

Article

Abundances of carbon-enhanced metal-poor stars as constraints on their formation. (2016) C.J. Hansen, B. Nordström, T.T. Hansen, C.R. Kennedy, V.M. Placco, T.C. Beers, J. Andersen, Gabriele Cescutti and Cristina Chiappini

Lithium abundances of extremely metal-poor turnoff stars. (2009) W. Aoki, P.S. Barklem, T.C. Beers, N. Christlieb, S. Inoue, A.E. Garcia Perez, J.E. Norris and D. Carollo

A new sample of extremely/ultra metal-poor stars. (2008) A. E. Garcia Perez, N. Christlieb, Sean G. Ryan, T.C. Beers, W. Aoki, M. Asplund, P.S. Barklem, M.S. Bessell, K. Eriksson, A. Frebel, B. Gustafsson, A.J. Korn, B. Nordstrom and J.E. Norris

Carbon-Enhanced Metal-Poor Stars. III : Main-Sequence Turn-Off Stars from the SDSS/SEGUE Sample. (2008) W. Aoki, T.C. Beers, T. Sivarani, B. Marsteller, Y.S. Lee, S. Honda, J.E. Norris, Sean G. Ryan and D. Carollo

Carbon enhanced metal-poor stars I : Chemical compositions of 26 stars. (2007) W. Aoki, T.C. Beers, N. Christlieb, J.E. Norris, Sean G. Ryan and S. Tsangarides

Spectroscopic studies of extremely metal-poor stars with the Subaru high dispersion spectrograph. IV : The alpha-element-enhanced metal-poor star BS16934-002. (2007) W. Aoki, S. Honda, T.C. Beers, M. Takada-Hidai, N. Iwamoto, N. Tominaga, H. Umeda, K. Nomoto, J.E. Norris and Sean G. Ryan

Carbon-enhanced metal-poor stars. Osmium and iridium abundances in the neutron-capture-enhanced subgiants CS31062-050 and LP625-44. (2006) W. Aoki, S. Bisterzo, R. Gallino, T.C. Beers, J.E. Norris, Sean G. Ryan and S. Tsangarides

A high-resolution spectral analysis of three carbon-enhanced metal-poor stars. (2006) A. Goswami, W. Aoki, T.C. Beers, N. Christlieb, J.E. Norris, Sean G. Ryan and S. Tsangarides

Nucleosynthetic signatures of the first stars. (2005) 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, Sean G. Ryan, M. Takada-Hidai, S. Tsangarides and Y. Yoshii

Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing. (2005) E. Arnone, Sean G. Ryan, D. Argast, J.E. Norris and T.C. Beers

The Binary Frequency Among Carbon-enhanced, s-Process-rich, Metal-poor Stars. (2005) S. Lucatello, S. Tsangarides, T.C. Beers, E. Carretta, R.G. Gratton and Sean G. Ryan

The new record holder for the most iron-poor star: HE 1327−2326, a dwarf or subgiant with [Fe/H] = −5.4. (2005) 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, Sean G. Ryan, M. Takada-Hidai, S. Tsangarides and Y. Yoshii

The Hamburg/ESO R-process Enhanced Star survey (HERES). I : Project description and discovery of two stars with strong enhancements of neutron-capture elements. (2004) N. Christlieb, T.C. Beers, P.S. Barklem, M.S. 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. Nordstrom, B. Pfeiffer, J. Rhee and Sean G. Ryan

Oxygen Overabundance in the Extremely Iron-poor Star CS 29498-043. (2004) W. Aoki, J.E. Norris, Sean G. Ryan, T.C. Beers, N. Christlieb, S. Tsangarides and H. Ando

Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. I. Observational Data. (2004) 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 and Sean G. Ryan

On the binarity of carbon-enhanced, metal-poor stars. (2004) S. Tsangarides, Sean G. Ryan and T.C. Beers

Europium Isotope Ratios in s-Process Element-enhanced Metal-poor Stars : A New probe of the 151Sm Branching. (2003) W. Aoki, Sean G. Ryan, N. Iwamoto, T.C. Beers, J.E. Norris, H. Ando, T. Kajino, G.J. Mathews and M.Y. Fujimoto

A Subaru/High Dispersion Spectrograph Study of Lead (Pb) Abundances in Eight s-Process Element-rich, Metal-poor Stars. (2002) W. Aoki, Sean G. Ryan, J.E. Norris, T.C. Beers, H. Ando and S. Tsangarides

Chemical Composition fo the Carbon-rich, Extremely Metal Poor Star CS 29498-043. (2002) W. Aoki, J.E. Norris, Sean G. Ryan, T.C. Beers and H. Ando

Rapid Rotation of Ultra-Li-depleted Halo Stars and Their Association with Blue Stragglers. (2002) Sean G. Ryan, S. Gregory, U. Kolb, T.C. Beers and T. Kajino

Extremely Metal-poor Stars : IX CS 22949-037 and the Role of Hypernovae. (2002) J.E. Norris, Sean G. Ryan, T.C. Beers, H. Ando and W. Aoki

The Chemical Composition of Carbon-rich, very Metal Poor Stars : A New Class of Mildly Carbon Rich Objects without Excess of Neutron-Capture Elements. (2002) W. Aoki, J.E. Norris, Sean G. Ryan, T.C. Beers and H. Ando

Extremely Metal-Poor Stars. VIII. High-Resolution, HighSignal-to-Noise Ratio Analysis of Five Stars with [Fe/H][[3.5. (2001) J.E. Norris, Sean G. Ryan and T.C. Beers

Neutron Capture Elements in s-Process-Rich, Very Metal-Poor Stars. (2001) W. Aoki, Sean G. Ryan, J.E. Norris, T.C. Beers, H. Ando, N. Iwamoto, T. Kajino, G.J. Mathews and M.Y. Fujimoto

Abundances and Evolution of Lithium in the Galactic Halo and Disk. (2001) Sean G. Ryan, T. Kajino, T.C. Beers, T.K. Suzuki, D. Romano, F. Matteucci and K. Rosolankova

Ultra-Lithium-deficient Halo Stars and Blue Stragglers : A Common Origin? (2001) Sean G. Ryan, T.C. Beers, T. Kajino and K. Rosolankova

s- and r-process elements in two very metal-poor stars. (2001) Sean G. Ryan, W. Aoki, L.A.J. Blake, J.E. Norris, T.C. Beers, R. Gallino, M. Busso and H. Ando

Primordial Lithium and Big Bang Nucleosynthesis. (2000) Sean G. Ryan, T.C. Beers, K.A. Olive, B.D. Fields and J.E. Norris

Beryllium Abundances in Halo Stars from Keck/HIRES Observations. (1999) A.M. Boesgaard, C.P. Deliyannis, J.R. King, Sean G. Ryan, S. Vogt and T.C. Beers

Estimation of Stellar Metal Abundance. II : A Recalibration of the Ca II K Technique, and the Autocorrelation Function Method. (1999) T.C. Beers, S. Rossi, J.E. Norris, Sean G. Ryan and T. Shefler

The Spite Lithium Plateau: Ultrathin but Postprimordial. (1999) Sean G. Ryan, J.E. Norris and T.C. Beers

Conference or Workshop Item

NLTE spectral analysis of helium-rich sdO stars from the southern HK survey. (1996) J.S. Drilling, R. Napiwotzki, S. Dreizler, U. Heber and T.C. Beers

Other

Abundances and Kinematics of Extremely Metal-Deficient, Carbon-Rich Halo Stars. (2003) S. Tsangarides, Sean G. Ryan and T.C. Beers