KMS National Astronomical Observatories, CAS
| 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 Publication | ASTROPHYSICAL JOURNAL LETTERS
 |
| ISSN | 2041-8205 |
| Volume | 902Issue:2Pages:9 |
| Abstract | Binary 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. |
| Keyword | R-process Galaxy chemical evolution Solar neighborhood the Milky Way physics Compact objects Neutron stars |
| Funding Organization | 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 ; 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 |
| DOI | 10.3847/2041-8213/abbc0d |
| WOS Keyword | R-PROCESS ; CHEMICAL EVOLUTION ; NUCLEOSYNTHESIS ; SUPERNOVAE ; ELEMENTS ; SYSTEMS |
| Language | 英语 |
| Funding Project | Academia 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 Organization | 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 ; 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 Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000579647100001 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/81958 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Banerjee, Projjwal |
| Affiliation | 1.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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