The Isophotal Structure of Star-forming Galaxies at $0.5< z <1.8$ in CANDELS: Implications for the Evolution of Galaxy Structure
| Autor: | Dale D. Kocevski, Anton M. Koekemoer, Hassen M. Yesuf, Dongfei Jiang, Guillermo Barro, Lu Liu, Yicheng Guo, David C. Koo, Meng Jia, S. M. Faber, Xian-Min Meng, Weichen Wang, Elizabeth J. McGrath, Nimish P. Hathi, F. S. Liu, Wei Tong, Jerome J. Fang, Xianzhong Zheng |
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| Přispěvatelé: | Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
010308 nuclear & particles physics Star (game theory) Structure (category theory) Astronomy and Astrophysics Radius Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Redshift Galaxy galaxies: photometry Space and Planetary Science galaxies: high-redshift [SDU]Sciences of the Universe [physics] galaxies: star formation 0103 physical sciences Astrophysics::Earth and Planetary Astrophysics Maxima 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, 2018, 854, ⟨10.3847/1538-4357/aaa5ad⟩ |
| ISSN: | 0004-637X 1538-4357 |
| Popis: | We have measured the radial profiles of isophotal ellipticity ($\varepsilon$) and disky/boxy parameter A$_4$ out to radii of about three times the semi-major axes for $\sim4,600$ star-forming galaxies (SFGs) at intermediate redshifts $0.51$. 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 $\varepsilon$ with radius and are dominated by disky values at intermediate radii. These findings at intermediate redshifts imply that low-mass SSFGs are not disk-like, while low-mass LSFGs appear to harbour disk-like components flattened by significant rotation. At high masses ($M_{\ast} > 10^{10}M_{\odot}$), highly-inclined SSFGs and LSFGs both exhibit a general, distinct trend for both $\varepsilon$ and A$_4$ profiles: increasing values with radius at lower radii, reaching maxima at intermediate radii, and then decreasing values at larger radii. Such a trend is more prevalent for more massive ($M_{\ast} > 10^{10.5}M_{\odot}$) galaxies or those at lower redshifts ($z |
| Databáze: | OpenAIRE |
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