The evolution of galaxy shapes in CANDELS: from prolate to discy
文献类型:期刊论文
作者 | Zhang, Haowen5,6; Primack, Joel R.7,8; Faber, S. M.9; Koo, David C.9; Dekel, Avishai8,10; Chen, Zhu11; Ceverino, Daniel12; Chang, Yu-Yen2; Fang, Jerome J.1; Guo, Yicheng13 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2019-04-01 |
卷号 | 484期号:4页码:5170-5191 |
ISSN号 | 0035-8711 |
关键词 | galaxies: evolution galaxies: formation galaxies: fundamental parameters |
DOI | 10.1093/mnras/stz339 |
英文摘要 | We model the projected b/a-log a distributions of CANDELS star-forming main-sequence galaxies, where a (b) is the half-light semimajor (semiminor) axis of the galaxy images measured by GALFIT. We find that smaller a galaxies are rounder at all stellar masses M-* and redshifts, so we include a when analysing b/a distributions. Approximating intrinsic shapes of the galaxies as triaxial ellipsoids and assuming amultivariate normal distribution of galaxy size and two shape parameters, we construct their intrinsic shape and size distributions to obtain the fractions of elongated (prolate), discy (oblate), and spheroidal galaxies in each redshift and mass bin. We find that galaxies tend to be prolate at low M-* and high redshifts, and discy at high M-* and low redshifts, qualitatively consistent with van der Wel et al., implying that galaxies tend to evolve from prolate to discy. These results are consistent with the predictions from simulations that the transition from prolate to oblate is caused by a compaction event at a characteristic mass range, making the galaxy centre baryon dominated. We give probabilities of a galaxy's being elongated, discy, or spheroidal as a function of its M-*, redshift, and projected b/a and a, which can facilitate target selections of galaxies with specific shapes at high redshifts. |
资助项目 | China Scholarship Council ; Fujian Fuguang Foundation ; US-Israel BSF[2014-273] ; GIF[I-1341-303.7/2016] ; NSF[AST-1405962] ; NSF[DIP STE1869/2-1 GE625/17-1] ; NASA through a grant from the Space Telescope Science Institute[HST-AR-15025] ; NASA through a grant from the Space Telescope Science Institute[NAS5-26555] ; NASA through a grant from the Space Telescope Science Institute[HST-GO-12060] ; ERC Advanced Grant, STARLIGHT: Formation of the First Stars[339177] ; [HST-AR-14578.001-A] ; [NSF-AST-1615730] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000462414400052 |
源URL | [http://119.78.226.72/handle/331011/31855] |
专题 | 中国科学院上海天文台 |
通讯作者 | Zhang, Haowen |
作者单位 | 1.Orange Coast Coll, Costa Mesa, CA 92626 USA 2.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 10617, Taiwan 3.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 4.Univ Ghent, Sterrenkundig Observatorium, Krijgslaan 281 S9, B-9000 Ghent, Belgium 5.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 7.Univ Calif Santa Cruz, Phys Dept, Santa Cruz, CA 95064 USA 8.Univ Calif Santa Cruz, SCIPP, Santa Cruz, CA 95064 USA 9.Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA 10.Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel |
推荐引用方式 GB/T 7714 | Zhang, Haowen,Primack, Joel R.,Faber, S. M.,et al. The evolution of galaxy shapes in CANDELS: from prolate to discy[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,484(4):5170-5191. |
APA | Zhang, Haowen.,Primack, Joel R..,Faber, S. M..,Koo, David C..,Dekel, Avishai.,...&van der Wel, Arjen.(2019).The evolution of galaxy shapes in CANDELS: from prolate to discy.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,484(4),5170-5191. |
MLA | Zhang, Haowen,et al."The evolution of galaxy shapes in CANDELS: from prolate to discy".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 484.4(2019):5170-5191. |
入库方式: OAI收割
来源:上海天文台
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