The Isophotal Structure of Star-forming Galaxies at 0.5 < z < 1.8 in CANDELS: Implications for the Evolution of Galaxy Structure
文献类型：期刊论文
| 作者 | Jiang, Dongfei1,2; Liu, F. S.1,3,4; Zheng, Xianzhong2,5 ; Yesuf, Hassen M.3,4; Koo, David C.3,4; Faber, S. M.3,4; Guo, Yicheng3,4; Koekemoer, Anton M.6; Wang, Weichen7; Fang, Jerome J.3,4,8
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2018-02-10 |
| 卷号 | 854期号:1页码:16 |
| 关键词 | galaxies: high-redshift galaxies: photometry galaxies: star formation |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aaa5ad |
| 通讯作者 | Liu, F. S.(fengshan.liu@yahoo.com) |
| 英文摘要 | We have measured the radial profiles of isophotal ellipticity (epsilon) and disky/boxy parameter A(4) out to radii of about three times the semimajor axes for similar to 4600 star-forming galaxies (SFGs) between redshift 0.5 and 1.8 in the CANDELS/GOODS-S and UDS fields. Based on the average size-mass relation in each redshift bin, we divide our galaxies at a given mass into Small SFGs (SSFGs; smaller than the average) and Large SFGs (LSFGs; larger than the average). We show that, at low masses (M-* < 10(10)M(circle dot)), the SSFGs generally have nearly flat epsilon and A(4) profiles in both edge-on and face-on views, especially at z > 1. Moreover, the median A(4) values at all radii are almost zero. In contrast, the highly inclined low-mass LSFGs in the same mass-redshift bins generally have monotonically increasing epsilon profiles with radius and disky feature dominated in the intermediate regions. These findings imply that at these redshifts, the low-mass SSFGs are not disk-like, whereas the low-mass LSFGs likely harbour disk-like components flattened by significant rotations. At high masses (M-* > 10(10)M(circle dot)), both highly inclined SSFGs and LSFGs generally exhibit distinct trends in both epsilon and A(4) profiles, which increase at lower radii, reach maxima, then decrease at larger radii. Such the feature is more prevalent for more massive (M-* > 10(10.5)M(circle dot)) galaxies or at lower redshifts (z < 1.4). This feature can be simply explained if galaxies possess all three components: central bulges, disks in the intermediate regions, and halo-like stellar components in the outskirts. |
| WOS关键词 | DARK-MATTER HALOES ; ULTRA-DEEP-FIELD ; HYBRID COSMOLOGICAL APPROACH ; MILKY-WAY ANALOG ; LESS-THAN 3 ; STELLAR HALO ; ELLIPTIC GALAXIES ; DISK GALAXIES ; SPIRAL GALAXIES ; GALACTIC STELLAR |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000425000100010 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22295]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Liu, F. S. |
| 作者单位 | 1.Shenyang Normal Univ, Coll Phys Sci & Technol, Shenyang 110034, Liaoning, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Calif Santa Cruz, Univ Calif Observ, Santa Cruz, CA 95064 USA 4.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA 5.Chinese Acad Sci, South Amer Ctr Astron, China Chile Joint Ctr Astron, Camino El Observ 1515, Santiago, Chile 6.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA 7.Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA 8.Orange Coast Coll, Costa Mesa, CA 92626 USA 9.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA 10.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Dongfei,Liu, F. S.,Zheng, Xianzhong,et al. The Isophotal Structure of Star-forming Galaxies at 0.5 < z < 1.8 in CANDELS: Implications for the Evolution of Galaxy Structure[J]. ASTROPHYSICAL JOURNAL,2018,854(1):16. |
| APA | Jiang, Dongfei.,Liu, F. S..,Zheng, Xianzhong.,Yesuf, Hassen M..,Koo, David C..,...&Hathi, Nimish P..(2018).The Isophotal Structure of Star-forming Galaxies at 0.5 < z < 1.8 in CANDELS: Implications for the Evolution of Galaxy Structure.ASTROPHYSICAL JOURNAL,854(1),16. |
| MLA | Jiang, Dongfei,et al."The Isophotal Structure of Star-forming Galaxies at 0.5 < z < 1.8 in CANDELS: Implications for the Evolution of Galaxy Structure".ASTROPHYSICAL JOURNAL 854.1(2018):16. |
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来源：紫金山天文台
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