High-resolution ALMA Study of CO J = 2–1 Line and Dust Continuum Emissions in Cluster Galaxies at z = 1.46
| Autor: | Ryota Ikeda, Ken-ichi Tadaki, Daisuke Iono, Tadayuki Kodama, Jeffrey C. C. Chan, Bunyo Hatsukade, Masao Hayashi, Takuma Izumi, Kotaro Kohno, Yusei Koyama, Rhythm Shimakawa, Tomoko L. Suzuki, Yoichi Tamura, Ichi Tanaka |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal. 933:11 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.3847/1538-4357/ac6cdc |
| Popis: | We present new Atacama Large Millimeter/submillimeter Array (ALMA) results obtained from spatially resolved CO $J$=2-1 line ($0.4''$ resolution) and 870 $\mu$m continuum ($0.2''$ resolution) observations of cluster galaxies in XMMXCS J2215.9-1738 at $z=1.46$. Our sample comprises 17 galaxies within $\sim0.5$ Mpc ($0.6R_{200}$) of the cluster center, all of which have previously been detected in the CO $J$=2-1 line at a lower resolution. The effective radii of both the CO $J$=2-1 line and 870 $\mu$m dust continuum emissions are robustly measured for nine galaxies by modeling the visibilities. We find that the CO $J$=2-1 line emission in all of the nine galaxies is more extended than the dust continuum emission by a factor of $2.8\pm1.4$. We investigate the spatially resolved Kennicutt-Schmidt (KS) relation in two regions within the interstellar medium of the galaxies. The relation for our sample reveals that the central region ($0 Comment: To appear in ApJ, minor revisions during proofing process, 21 pages, 10 figures, 2 tables |
| Databáze: | OpenAIRE |
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