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Neutron Star Mergers as the Main Source ofr-process: Natal Kicks and Inside-out Evolution to the Rescue
Banerjee, Projjwal1; Wu, Meng-Ru2,3,4; Yuan, Zhen5,6
2020-10-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume902Issue:2Pages:9
AbstractBinary neutron star mergers (BNSMs) are currently the most promising source ofr-process thanks to the detection of GW170817. The estimated occurring frequency and the amount of mass ejected per merger indicate that BNSMs by themselves can account for all ther-process enrichment in the Galaxy. However, the decreasing trend of [Eu/Fe] versus [Fe/H] of disk stars for [Fe/H] greater than or similar to -1 in the solar neighborhood is inconsistent with the flat trend expected from BNSMs with a standard delay time distribution (DTD) proportional to t(-1). This has led to the suggestion that either additional sources or modification to the DTD of BNSMs is required to match the observations. We investigate the effects of natal kicks received during the birth of neutron star binaries on the chemical evolution ofr-process element Eu in the Milky Way by combining the results from the galactic dynamics codegalpywith a one-zone Galactic chemical evolution modelomega. We show that when key inputs from simulations of the inside-out disk evolution are combined with natal kicks, BNSMs can naturally reproduce the observed decreasing trend of [Eu/Fe] with [Fe/H] in the solar neighborhood without the need for modification to the DTD or additionalr-process sources.
KeywordR-process Galaxy chemical evolution Solar neighborhood the Milky Way physics Compact objects Neutron stars
Funding OrganizationAcademia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program
DOI10.3847/2041-8213/abbc0d
WOS KeywordR-PROCESS ; CHEMICAL EVOLUTION ; NUCLEOSYNTHESIS ; SUPERNOVAE ; ELEMENTS ; SYSTEMS
Language英语
Funding ProjectAcademia Sinica[AS-CDA-109-M11] ; Ministry of Science and Technology, Taiwan[108-2112-M-001-010] ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program[Y955051001]
Funding OrganizationAcademia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program ; Academia Sinica ; Academia Sinica ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Physics Division, National Center of Theoretical Science of Taiwan ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Special Funding for Advanced Users through LAMOST FELLOWSHIP ; Shanghai Sailing Program ; Shanghai Sailing Program
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000579647100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81962
Collection中国科学院国家天文台
Corresponding AuthorBanerjee, Projjwal
Affiliation1.Indian Inst Technol Palakkad, Discipline Phys, Kozhippara 678557, Kerala, India
2.Acad Sinica, Inst Phys, Taipei 11529, Taiwan
3.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan
4.Natl Ctr Theoret Sci, Div Phys, Hsinchu 30013, Taiwan
5.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
6.Univ Strasbourg, CNRS, Observ Astron Strasbourg, UMR 7550, F-67000 Strasbourg, France
Recommended Citation
GB/T 7714
Banerjee, Projjwal,Wu, Meng-Ru,Yuan, Zhen. Neutron Star Mergers as the Main Source ofr-process: Natal Kicks and Inside-out Evolution to the Rescue[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,902(2):9.
APA Banerjee, Projjwal,Wu, Meng-Ru,&Yuan, Zhen.(2020).Neutron Star Mergers as the Main Source ofr-process: Natal Kicks and Inside-out Evolution to the Rescue.ASTROPHYSICAL JOURNAL LETTERS,902(2),9.
MLA Banerjee, Projjwal,et al."Neutron Star Mergers as the Main Source ofr-process: Natal Kicks and Inside-out Evolution to the Rescue".ASTROPHYSICAL JOURNAL LETTERS 902.2(2020):9.
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