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Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754
Mardini,Mohammad K.1,2; Placco,Vinicius M.3; Meiron,Yohai4; Ishchenko,Marina5; Avramov,Branislav6; Mazzarini,Matteo6; Berczik,Peter5,6,7; Sedda,Manuel Arca6; Beers,Timothy C.8,9; Frebel,Anna9,10; Taani,Ali11; Donnari,Martina12; Al-Wardat,Mashhoor A.13,14; Zhao,Gang1,2
2020-11-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume903Issue:2
AbstractAbstract This study presents a comprehensive chemodynamical analysis of LAMOST J1109+0754, a bright (V?=?12.8), extremely metal-poor ([Fe/H]?=??3.17) star, with a strong r-process enhancement ([Eu/Fe]?=?+0.94 ± 0.12). Our results are based on the 7D measurements supplied by Gaia and the chemical composition derived from a high-resolution (R?~?110,000), high signal-to-noise ratio ( optical spectrum obtained by the 2.4 m Automated Planet Finder Telescope at Lick Observatory. We obtain chemical abundances of 31 elements (from lithium to thorium). The abundance ratios ([X/Fe]) of the light elements (Z?≤?30) suggest a massive Population III progenitor in the 13.4–29.5 M⊙ mass range. The heavy-element (30?
KeywordChemically peculiar stars Population III stars R-process Stellar kinematics Chemical abundances Stellar dynamics Orbits Galaxy dynamics
DOI10.3847/1538-4357/abbc13
Language英语
WOS IDIOP:0004-637X-903-2-abbc13
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62289
Collection中国科学院国家天文台
Corresponding AuthorZhao,Gang
Affiliation1.Key Lab of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China gzhao@nao.cas.cn
2.Institute of Space Sciences, Shandong University, Weihai 264209, People’s Republic of China
3.NSF’s Optical-Infrared Astronomy Research Laboratory, Tucson, AZ 85719, USA
4.Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada
5.Main Astronomical Observatory, National Academy of Sciences of Ukraine, 27 Akademika Zabolotnoho St., 03143 Kyiv, Ukraine
6.Astronomisches Rechen Institut—Zentrum für Astronomie der Universit?t Heidelberg, M?nchhofstrasse 12-14, D-69120 Heidelberg, Germany
7.National Astronomical Observatories and Key Laboratory of Computational Astrophysics, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China
8.Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA
9.JINA Center for the Evolution of the Elements (JINA-CEE), USA
10.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
11.Physics Department, Faculty of Science, Al-Balqa Applied University, Jordan
12.Max-Planck-Institut für Astronomie, K?nigstuhl 17, 69117 Heidelberg, Germany
13.Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, United Arab Emirates
14.Sharjah Academy for Astronomy, Space Sciences and Technology, University of Sharjah, Sharjah, United Arab Emirates
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Mardini,Mohammad K.,Placco,Vinicius M.,Meiron,Yohai,et al. Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754[J]. The Astrophysical Journal,2020,903(2).
APA Mardini,Mohammad K..,Placco,Vinicius M..,Meiron,Yohai.,Ishchenko,Marina.,Avramov,Branislav.,...&Zhao,Gang.(2020).Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754.The Astrophysical Journal,903(2).
MLA Mardini,Mohammad K.,et al."Cosmological Insights into the Early Accretion of r-process-enhanced Stars. I. A Comprehensive Chemodynamical Analysis of LAMOST J1109+0754".The Astrophysical Journal 903.2(2020).
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