Ring Galaxies Through Off-center Minor Collisions by Tuning Bulge-to-disk Mass Ratio of Progenitors | |
Chen, Guangwen1,2; Wu, Xufen1,2; Kong, Xu1,2; Liu WJ(刘文娟)3,4; Zhao, HongSheng5 | |
发表期刊 | ASTROPHYSICAL JOURNAL |
2018-09-01 | |
卷号 | 864期号:1页码:20 |
DOI | 10.3847/1538-4357/aad4b2 |
产权排序 | 第3完成单位 |
收录类别 | SCI |
关键词 | galaxies: evolution galaxies: general galaxies: interactions galaxies: kinematics and dynamics methods: numerical |
摘要 | Collisional ring galaxies (CRGs) are formed through off-center collisions between a target galaxy and an intruder dwarf galaxy. We study the mass distribution and kinematics of CRGs by tuning the bulge-to-disk mass ratio (B/D) for the progenitor; i.e., the target galaxy. We find that the lifetime of the ring correlates with the initial impact velocity vertical to the disk plane (i.e., nu(z0)). Three orbits for the collisional galaxy pair, on which clear and asymmetric rings form after collisions, are selected to perform the N-body simulations at different values of B/D for the progenitor. It is found that the ring structures are the strongest for CRGs with small values of B/D. The Sersic index, n, of the central remnant in the target galaxy becomes larger after collision. Moreover, the Sersic index of a central remnant strongly correlates with the initial value of B/D for the progenitor. A bulge-less progenitor results in a late-type object in the center of the ring galaxy, whereas a bulge-dominated progenitor leads to an early-type central remnant. Progenitors with B/D is an element of [0.1, 0.3] (i.e., minor bulges) leave central remnants with n approximate to 4. These results provide a possible explanation for the formation of a recently observed CRG with an early-type central nucleus, SDSS J1634+2049. In addition, we find that the radial and azimuthal velocity profiles for a ring galaxy are more sensitive to the B/D than the initial relative velocity of the progenitor. |
资助项目 | National Natural Science Foundation of China (NSFC)[11503025] ; National Natural Science Foundation of China (NSFC)[11421303] ; National Natural Science Foundation of China (NSFC)[11320101002] ; National Natural Science Foundation of China (NSFC)[11433005] ; Anhui Natural Science Foundation[1708085MA20] ; Fundamental Research Funds for the Central Universities ; Hundred Talents Project of Anhui Province ; National Key R&D Program of China[2015CB857004] ; National Key R&D Program of China[2017YFA0402600] ; Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China[J1310021] ; Natural Science Foundation of China[NSFC 11703079] ; "Light of West China" Program of Chinese Academy of Sciences (CAS) |
项目资助者 | National Natural Science Foundation of China (NSFC)[11503025, 11421303, 11320101002, 11433005] ; Anhui Natural Science Foundation[1708085MA20] ; Fundamental Research Funds for the Central Universities ; Hundred Talents Project of Anhui Province ; National Key R&D Program of China[2015CB857004, 2017YFA0402600] ; Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China[J1310021] ; Natural Science Foundation of China[NSFC 11703079] ; "Light of West China" Program of Chinese Academy of Sciences (CAS) |
语种 | 英语 |
学科领域 | 天文学 |
文章类型 | Article |
出版者 | IOP PUBLISHING LTD |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
ISSN | 0004-637X |
URL | 查看原文 |
WOS记录号 | WOS:000443244200023 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | ADAPTIVE MESH REFINEMENT ; N-BODY REALIZATIONS ; COSMOLOGICAL SIMULATIONS ; NUMERICAL EXPERIMENTS ; GLOBAL STRUCTURE ; GALACTIC BULGES ; MILKY-WAY ; MODEL ; STELLAR ; MERGERS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/17896 |
专题 | 自由探索组 中国科学院天体结构与演化重点实验室 |
通讯作者 | Chen, Guangwen; Wu, Xufen |
作者单位 | 1.CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, People's Republic of China 2.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People's Republic of China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, People's Republic of China 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan, 650011, People's Republic of China 5.School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK |
推荐引用方式 GB/T 7714 | Chen, Guangwen,Wu, Xufen,Kong, Xu,et al. Ring Galaxies Through Off-center Minor Collisions by Tuning Bulge-to-disk Mass Ratio of Progenitors[J]. ASTROPHYSICAL JOURNAL,2018,864(1):20. |
APA | Chen, Guangwen,Wu, Xufen,Kong, Xu,Liu WJ,&Zhao, HongSheng.(2018).Ring Galaxies Through Off-center Minor Collisions by Tuning Bulge-to-disk Mass Ratio of Progenitors.ASTROPHYSICAL JOURNAL,864(1),20. |
MLA | Chen, Guangwen,et al."Ring Galaxies Through Off-center Minor Collisions by Tuning Bulge-to-disk Mass Ratio of Progenitors".ASTROPHYSICAL JOURNAL 864.1(2018):20. |
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