Size - Stellar Mass Relation and Morphology of Quiescent Galaxies at $z\geq3$ in Public $JWST$ Fields
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| Format: | Preprint |
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2023
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| author | Ito, Kei Valentino, Francesco Brammer, Gabriel Faisst, Andreas L. Gillman, Steven Gomez-Guijarro, Carlos Gould, Katriona M. L. Heintz, Kasper E. Ilbert, Olivier Jespersen, Christian Kragh Kokorev, Vasily Kubo, Mariko Magdis, Georgios E. McPartland, Conor Onodera, Masato Rizzo, Francesca Tanaka, Masayuki Toft, Sune Vijayan, Aswin P. Weaver, John R. Whitaker, Katherine E. Wright, Lillian |
| author_facet | Ito, Kei Valentino, Francesco Brammer, Gabriel Faisst, Andreas L. Gillman, Steven Gomez-Guijarro, Carlos Gould, Katriona M. L. Heintz, Kasper E. Ilbert, Olivier Jespersen, Christian Kragh Kokorev, Vasily Kubo, Mariko Magdis, Georgios E. McPartland, Conor Onodera, Masato Rizzo, Francesca Tanaka, Masayuki Toft, Sune Vijayan, Aswin P. Weaver, John R. Whitaker, Katherine E. Wright, Lillian |
| contents | We present the results of a systematic study of the rest-frame optical morphology of quiescent galaxies at $z \geq 3$ using the Near-Infrared Camera (NIRCam) onboard $JWST$. Based on a sample selected by $UVJ$ color or $NUVUVJ$ color, we focus on 26 quiescent galaxies with $9.8<\log{(M_\star/M_\odot)}<11.4$ at $2.8<z_{\rm phot}<4.6$ with publicly available $JWST$ data. Their sizes are constrained by fitting the Sérsic profile to all available NIRCam images. We see a negative correlation between the observed wavelength and the size in our sample and derive their size at the rest-frame $0.5\, {\rm μm}$ taking into account this trend. Our quiescent galaxies show a significant correlation between the rest-frame $0.5\, {\rm μm}$ size and the stellar mass at $z\geq3$. The analytical fit for them at $\log{(M_\star/M_\odot)}>10.3$ implies that our size - stellar mass relations are below those at lower redshifts, with the amplitude of $\sim0.6\, {\rm kpc}$ at $M_\star = 5\times 10^{10}\, M_\odot$. This value agrees with the extrapolation from the size evolution of quiescent galaxies at $z<3$ in the literature, implying that the size of quiescent galaxies increases monotonically from $z\sim3-5$. Our sample is mainly composed of galaxies with bulge-like structures according to their median Sérsic index and axis ratio of $n\sim3-4$ and $q\sim0.6-0.8$, respectively. On the other hand, there is a trend of increasing fraction of galaxies with low Sérsic index, suggesting $3<z<5$ might be the epoch of onset of morphological transformation with a fraction of very notable disky quenched galaxies. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2307_06994 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Size - Stellar Mass Relation and Morphology of Quiescent Galaxies at $z\geq3$ in Public $JWST$ Fields Ito, Kei Valentino, Francesco Brammer, Gabriel Faisst, Andreas L. Gillman, Steven Gomez-Guijarro, Carlos Gould, Katriona M. L. Heintz, Kasper E. Ilbert, Olivier Jespersen, Christian Kragh Kokorev, Vasily Kubo, Mariko Magdis, Georgios E. McPartland, Conor Onodera, Masato Rizzo, Francesca Tanaka, Masayuki Toft, Sune Vijayan, Aswin P. Weaver, John R. Whitaker, Katherine E. Wright, Lillian Astrophysics of Galaxies We present the results of a systematic study of the rest-frame optical morphology of quiescent galaxies at $z \geq 3$ using the Near-Infrared Camera (NIRCam) onboard $JWST$. Based on a sample selected by $UVJ$ color or $NUVUVJ$ color, we focus on 26 quiescent galaxies with $9.8<\log{(M_\star/M_\odot)}<11.4$ at $2.8<z_{\rm phot}<4.6$ with publicly available $JWST$ data. Their sizes are constrained by fitting the Sérsic profile to all available NIRCam images. We see a negative correlation between the observed wavelength and the size in our sample and derive their size at the rest-frame $0.5\, {\rm μm}$ taking into account this trend. Our quiescent galaxies show a significant correlation between the rest-frame $0.5\, {\rm μm}$ size and the stellar mass at $z\geq3$. The analytical fit for them at $\log{(M_\star/M_\odot)}>10.3$ implies that our size - stellar mass relations are below those at lower redshifts, with the amplitude of $\sim0.6\, {\rm kpc}$ at $M_\star = 5\times 10^{10}\, M_\odot$. This value agrees with the extrapolation from the size evolution of quiescent galaxies at $z<3$ in the literature, implying that the size of quiescent galaxies increases monotonically from $z\sim3-5$. Our sample is mainly composed of galaxies with bulge-like structures according to their median Sérsic index and axis ratio of $n\sim3-4$ and $q\sim0.6-0.8$, respectively. On the other hand, there is a trend of increasing fraction of galaxies with low Sérsic index, suggesting $3<z<5$ might be the epoch of onset of morphological transformation with a fraction of very notable disky quenched galaxies. |
| title | Size - Stellar Mass Relation and Morphology of Quiescent Galaxies at $z\geq3$ in Public $JWST$ Fields |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2307.06994 |