SR
S. G. Ryan
astro-phastro-ph.SRastro-ph.GAastro-ph.COconjugated polymer nanoparticlesNIR-Iphotodynamic therapyreactive oxygen speciestheranostic probe
On Valency
published · living versionsW_w9a89kk8·v1 · currentpublished
The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0
with John E. Norris, David Yong, M. S. Bessell, N. Christlieb +6
1 version
Preprints & journals
52 papers in the corpus · 1999–2023A Critique of the Spite Plateau, and the Astration of Primordial Lithium2303.11497v1 · J. E. Norris, D. Yong, A. Frebel et al.2023 · 16 citationsarXiv
Theranostic Near-Infrared-Active Conjugated Polymer Nanoparticles.33978405 · Zhao, Miao, Leggett, Edward, Bourke, Struan et al.2021 · 38 citationsACS nano. 2021;15(5):8790-8802
Dynamically Tagged Groups of Very Metal-poor Halo Stars from the HK and Hamburg/ESO Surveys2011.08305v3 · Guilherme Limberg, Silvia Rossi, Timothy C. Beers et al.2020 · 69 citationsarXiv
Imaging of X-Ray-Excited Emissions from Quantum Dots and Biological Tissue in Whole Mouse.31844147 · Ryan, Sean G, Butler, Matthew N, Adeyemi, Segun S et al.2020 · 18 citationsScientific reports. 2019;9(1):19223
The Rotation of the halo of NGC 6822 from the radial velocities of carbon stars1605.05582v1 · Graham P Thompson, Sean G Ryan, Lisette F Sibbons2016 · 9 citationsarXiv
A three-dimensional hydrodynamical line profile analysis of iron lines and barium isotopes in HD1402831504.02353v1 · A. J. Gallagher, H.-G. Ludwig, S. G. Ryan et al.2015 · 23 citationsA&A 579, A94 (2015)
The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.01211.3157v1 · John E. Norris, David Yong, M. S. Bessell et al.2012 · 215 citationsarXivon Valency
Elemental abundances and classification of CEMP stars1210.5009v1 · Dinah M. Allen, Sean G. Ryan, Silvia Rossi et al.2012 · 90 citationsarXiv
The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters1208.2999v1 · John E. Norris, M. S. Bessell, David Yong et al.2012 · 82 citationsarXiv
The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.51208.3003v1 · David Yong, John E. Norris, M. S. Bessell et al.2012 · 341 citationsarXiv
The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction1208.3016v1 · David Yong, John E. Norris, M. S. Bessell et al.2012 · 131 citationsarXiv
The AGB population of NGC 6822: distribution and the C/M ratio from JHK photometry1202.3285v2 · L. F. Sibbons, S. G. Ryan, M.-R. L. Cioni M. Irwin et al.2012 · 38 citationsarXiv
The barium isotopic fractions in five metal-poor stars1201.1757v1 · A. J. Gallagher, S. G. Ryan, A. Hosford et al.2012 · 35 citationsarXiv
The barium isotopic mixture for the metal-poor subgiant star HD1402831008.3541v1 · A. J. Gallagher, S. G. Ryan, A. E. Garc'ia P'erez et al.2010 · 54 citationsarXiv
Lithium abundances of halo dwarfs based on excitation temperatures. II. NLTE1004.0863v1 · A. Hosford, A.E. Garcia Perez, R. Collet et al.2010 · 45 citationsarXiv
6Li/7Li estimates for metal-poor stars0909.5163v1 · A.E. Garcia Perez, W. Aoki, S. Inoue et al.2009 · 39 citationsarXiv
Lithium abundances of halo dwarfs based on excitation temperature. I. LTE0811.2506v1 · A. Hosford, S.G. Ryan, A.E. Garcia Perez et al.2008 · 80 citationsarXiv
Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turn-Off Stars from the SDSS/SEGUE Sample0801.4187v1 · Wako Aoki, Timothy C. Beers, Thirupathi Sivarani et al.2008 · 129 citationsAstrophys.J.678:1351-1371,2008
Searching for the Precursors of Life in External Galaxies0711.1372v1 · B. Lawton, C. W. Churchill, B. A. York et al.2007 · 0 citationsarXiv
Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. IV. The alpha-Element-Enhanced Metal-Poor Star BS16934-002astro-ph/0701159v1 · Wako Aoki, Satoshi Honda, Timothy C. Beers et al.2007 · 61 citationsAstrophys.J.660:747-761,2007
Experimental Mg I oscillator strengths and radiative lifetimes for astrophysical applications on metal-poor stars - New data for the Mg I b tripletastro-ph/0610033v2 · M. Aldenius, J.D. Tanner, S. Johansson et al.2006 · 48 citationsAstron.Astrophys. 461 (2007) 767-773
Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Starsastro-ph/0609702v1 · Wako Aoki, Timothy C. Beers, Norbert Christlieb et al.2006 · 496 citationsAstrophys.J.655:492-521,2007
Carbon-Enhanced Metal-Poor Stars. Osmium and Iridium Abundances in the Neutron-Capture-Enhanced Subgiants CS31062-050 and LP625-44astro-ph/0609138v1 · Wako Aoki, Sara Bisterzo, Roberto Gallino et al.2006 · 35 citationsAstrophys.J.650:L127-L130,2006
A high-resolution spectral analysis of three carbon-enhanced metal-poor starsastro-ph/0608106v1 · Aruna Goswami, Wako Aoki, Timothy C. Beers et al.2006 · 89 citationsMon.Not.Roy.Astron.Soc.372:343-356,2006
Neutron-capture elements in the very metal-poor star HD122563astro-ph/0602107v1 · S. Honda, W. Aoki, Y. Ishimaru et al.2006 · 229 citationsAstrophys.J. 643 (2006) 1180-1189
The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H]=-5.4astro-ph/0509658v1 · A. Frebel, W. Aoki, N. Christlieb et al.2005 · 8 citationsarXiv
HE1327-2326, an unevolved star with [Fe/H]<-5.0. I. A Comprehensive Abundance Analysisastro-ph/0509206v1 · W. Aoki, A. Frebel, N. Christlieb et al.2005 · 214 citationsAstrophys.J.639:897-917,2006
The Origins of Two Classes of Carbon-Enhanced, Metal-Poor Starsastro-ph/0508475v1 · S. G. Ryan, W. Aoki, J. E. Norris et al.2005 · 78 citationsAstrophys.J.635:349-354,2005
Nucleosynthetic signatures of the first stars.15829957 · Frebel, Anna, Aoki, Wako, Christlieb, Norbert et al.2005 · 562 citationsNature. 2005;434(7035):871-3
The Binary Frequency Among Carbon-Enhanced, s-Process Rich, Metal-Poor Starsastro-ph/0412422v1 · Sara Lucatello, Stelios Tsangarides, Timothy C. Beers et al.2004 · 326 citationsAstrophys.J. 625 (2005) 825-832
Mg abundances in metal-poor halo stars as a tracer of early Galactic mixingastro-ph/0410180v1 · E.Arnone, S.G.Ryan, D.Argast et al.2004 · 94 citationsarXiv
A low upper-limit on the lithium isotope ratio in HD140283astro-ph/0409745v1 · Wako Aoki, Susumu Inoue, Satoshi Kawanomoto et al.2004 · 18 citationsAstron.Astrophys. 428 (2004) 579-586
The Hamburg/ESO R-process Enhanced Star survey (HERES). I. Project description, and discovery of two stars with strong enhancements of neutron-capture elementsastro-ph/0408389v1 · N. Christlieb, T. C. Beers, P. S. Barklem et al.2004 · 164 citationsAstron.Astrophys. 428 (2004) 1027-1037
Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043astro-ph/0402585v1 · Wako Aoki, John E. Norris, Sean G. Ryan et al.2004 · 65 citationsAstrophys.J. 608 (2004) 971-977
Spectroscopic Studies of Extremely Metal-Poor Stars with Subaru/HDS:I. Observational Dataastro-ph/0402291v1 · S. Honda, W. Aoki, H. Ando et al.2004 · 49 citationsarXiv
Europium Isotope Ratios in s-Process-Element-Enhanced, Metal-Poor Stars: A New Probe of the 151Sm Branchingastro-ph/0306544v1 · Wako Aoki, Sean G. Ryan, Nobuyuki Iwamoto et al.2003 · 60 citationsAstrophys.J.592:L67-L70,2003
Detection of low Eu abundances in extremely metal-poor stars and the origin of r-process elementsastro-ph/0306388v2 · Yuhri Ishimaru (Ochanomizu U.), Shinya Wanajo (Sophia U.), Wako Aoki (NAOJ) et al.2003 · 67 citationsAstrophys.J.600:L47-L50,2003
Observations of r- and s-process elements in Population II starsastro-ph/0210341v1 · Sean G. Ryan2002 · 0 citationsNucl.Phys. A718 (2003) 317-324
Chemical Composition of the Carbon-rich, Extremely Metal-Poor Star CS 29498--043: A New Class of Extremely Metal-Poor Stars with Excesses of Magnesium and Siliconastro-ph/0208019v1 · W. Aoki, J.E. Norris, S.G. Ryan et al.2002 · 111 citationsAstrophys.J.576:L141-L144,2002
A Subaru/HDS study of Lead (Pb) abundances in eight s-process-element-rich, metal-poor starsastro-ph/0208020v1 · W. Aoki, S.G. Ryan, J.E. Norris et al.2002 · 200 citationsAstrophys.J.580:1149-1158,2002
Lithium 6104A in Population II starsastro-ph/0207489v1 · A. Ford, R.D. Jeffries, B. Smalley et al.2002 · 13 citationsAstron.Astrophys. 393 (2002) 617-628
The Chemical Composition of Carbon-Rich, Very Metal-Poor Stars: A New Class of Mildly Carbon-Rich Objects Without Excess of Neutron-Capture Elementsastro-ph/0111297v1 · Wako Aoki, John E. Norris, Sean G. Ryan et al.2001 · 136 citationsarXiv
Big Bang Nucleosynthesis, Population III, and Stellar Genetics in the Galactic Haloastro-ph/0111109v1 · Sean G. Ryan2001 · 1 citationarXiv
Neutron Capture Elements in s-Process-Rich, Very Metal-Poor Starsastro-ph/0107040v1 · Wako Aoki, Sean G. Ryan, John E. Norris et al.2001 · 152 citationsarXiv
The First Detection of Co in a Damped Lyman Alpha Systemastro-ph/0104466v1 · Sara L. Ellison, Sean G. Ryan, Jason X. Prochaska2001 · 1 citationarXiv
The First Detection of Cobalt in a Damped Lyman Alpha Systemastro-ph/0104301v1 · Sara L. Ellison, Sean G. Ryan, Jason X. Prochaska2001 · 28 citationsMon.Not.Roy.Astron.Soc. 326 (2001) 628
Abundances and Evolution of Lithium in the Galactic Halo and Diskastro-ph/0010411v1 · Sean G. Ryan, Toshitaka Kajino, Timothy C. Beers et al.2000 · 75 citationsarXiv
Ultra-Lithium-Deficient Halo Stars and Blue Stragglers: A Common Origin?astro-ph/0010413v1 · Sean G. Ryan, Timothy C. Beers, Toshitaka Kajino et al.2000 · 66 citationsarXiv
The Host Stars of Extrasolar Planets Have Normal Lithium Abundancesastro-ph/0007057v1 · Sean G. Ryan2000 · 83 citationsMon.Not.Roy.Astron.Soc. 316 (2000) L35
Extremely Metal-Poor Stars. VII. The Most Metal-Poor Dwarf, CS 22876-032astro-ph/0004350v1 · John E. Norris, Timothy C. Beers, Sean G. Ryan2000 · 49 citationsarXiv
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