$JWST$ Insight Into a Lensed $HST$-dark Galaxy and its Quiescent Companion at $z=2.58$
| Autor: | Kokorev, Vasily, Jin, Shuowen, Magdis, Georgios E., Caputi, Karina I., Valentino, Francesco, Dayal, Pratika, Trebitsch, Maxime, Brammer, Gabriel, Fujimoto, Seiji, Bauer, Franz, Iani, Edoardo, Kohno, Kotaro, Sese, David Blanquez, Gómez-Guijarro, Carlos, Rinaldi, Pierluigi, Navarro-Carrera, Rafael |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/2041-8213/acbd9d |
| Popis: | Using the novel $JWST$/NIRCam observations in the Abell 2744 field, we present a first spatially resolved overview of an $HST$-dark galaxy, spectroscopically confirmed at $z=2.58$ with magnification $\mu\approx1.9$. While being largely invisible at $\sim$1 $\mu$m with NIRCam, except for sparse clumpy sub-structures, the object is well-detected and resolved in the long-wavelength bands with a spiral shape clearly visible in F277W. By combining ancillary ALMA and $Herschel$ data, we infer that this object is an edge-on dusty spiral with an intrinsic stellar mass log$(M_*/M_\odot)\sim11.3$ and a dust-obscured SFR$\sim 300~M_\odot$~yr$^{-1}$. A massive quiescent galaxy (log$(M_*/M_\odot)\sim10.8$) with tidal features lies 2\farcs{0} away ($r$$\sim$9 kpc), at a consistent redshift as inferred by $JWST$ photometry, indicating a potential major merger. The dusty spiral lies on the main-sequence of star formation, and shows high dust attenuation in the optical ($3 Comment: 15 pages, 5 figures, 1 table. Accepted to ApJL |
| Databáze: | arXiv |
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