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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
刊名ASTROPHYSICAL JOURNAL
2018-09-01
卷号864期号:1页码:20
关键词galaxies: evolution galaxies: general galaxies: interactions galaxies: kinematics and dynamics methods: numerical
ISSN号0004-637X
DOI10.3847/1538-4357/aad4b2
产权排序第3完成单位
文献子类Article
英文摘要

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.

学科主题天文学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
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)
WOS关键词ADAPTIVE MESH REFINEMENT ; N-BODY REALIZATIONS ; COSMOLOGICAL SIMULATIONS ; NUMERICAL EXPERIMENTS ; GLOBAL STRUCTURE ; GALACTIC BULGES ; MILKY-WAY ; MODEL ; STELLAR ; MERGERS
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000443244200023
资助机构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)
内容类型期刊论文
源URL[http://ir.ynao.ac.cn/handle/114a53/17895]  
专题云南天文台_自由探索组
云南天文台_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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