Behind the dust veil: A panchromatic view of an optically dark galaxy at z=4.82
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866929688645992448 |
|---|---|
| author | Sillassen, Nikolaj B. Jin, Shuowen Magdis, Georgios E. Hodge, Jacqueline Gobat, Raphael Daddi, Emanuele Knudsen, Kirsten Finoguenov, Alexis Schinnerer, Eva Wang, Wei-Hao Gao, Zhen-Kai Weaver, John R. Algera, Hiddo Andika, Irham T. Brinch, Malte Chen, Chian-Chou Cochrane, Rachel Enia, Andrea Faisst, Andreas Gillman, Steven Gomez-Guijarro, Carlos Gozaliasl, Ghassem Hayward, Chris Kokorev, Vasily Merchant, Maya Rizzo, Francesca Talia, Margherita Valentino, Francesco Blánquez-Sesé, David Koekemoer, Anton M. Magnelli, Benjamin Rich, Michael Shuntov, Marko |
| author_facet | Sillassen, Nikolaj B. Jin, Shuowen Magdis, Georgios E. Hodge, Jacqueline Gobat, Raphael Daddi, Emanuele Knudsen, Kirsten Finoguenov, Alexis Schinnerer, Eva Wang, Wei-Hao Gao, Zhen-Kai Weaver, John R. Algera, Hiddo Andika, Irham T. Brinch, Malte Chen, Chian-Chou Cochrane, Rachel Enia, Andrea Faisst, Andreas Gillman, Steven Gomez-Guijarro, Carlos Gozaliasl, Ghassem Hayward, Chris Kokorev, Vasily Merchant, Maya Rizzo, Francesca Talia, Margherita Valentino, Francesco Blánquez-Sesé, David Koekemoer, Anton M. Magnelli, Benjamin Rich, Michael Shuntov, Marko |
| contents | Optically dark dusty star-forming galaxies (DSFGs) play an essential role in massive galaxy formation at early cosmic time, however their nature remains elusive. Here we present a detailed case study of all the baryonic components of a $z=4.821$ DSFG, XS55. Selected from the ultra-deep COSMOS-XS 3GHz map with a red SCUBA-2 450$μ$m/850$μ$m colour, XS55 was followed up with ALMA 3mm line scans and spectroscopically confirmed to be at $z=4.821$ via detections of the CO(5-4) and [CI](1-0) lines. JWST/NIRCam imaging reveals that XS55 is a F150W-dropout with red F277W/F444W colour, and a complex morphology: a compact central component embedded in an extended structure with a likely companion. XS55 is tentatively detected in X-rays with both Chandra and XMM-Newton, suggesting an active galactic nucleus (AGN) nature. By fitting a panchromatic SED spanning NIR to radio wavelengths, we revealed that XS55 is a massive main-sequence galaxy with a stellar mass of $M_\ast=(5\pm1)\times10^{10}\,{\rm M_\odot}$ and a star formation rate of ${\rm SFR}=540\pm177~{\rm M_\odot\,yr^{-1}}$. The dust of XS55 is optically thick in the far infrared (FIR) with a surprisingly cold dust temperature of $T_{\rm dust}=33\pm2\,{\rm K}$, making XS55 one of the coldest DSFGs at $z>4$ known to date. This work unveils the nature of a radio-selected F150W-dropout, suggesting the existence of a population of DSFGs hosting active black holes embedded in optically thick dust. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09363 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Behind the dust veil: A panchromatic view of an optically dark galaxy at z=4.82 Sillassen, Nikolaj B. Jin, Shuowen Magdis, Georgios E. Hodge, Jacqueline Gobat, Raphael Daddi, Emanuele Knudsen, Kirsten Finoguenov, Alexis Schinnerer, Eva Wang, Wei-Hao Gao, Zhen-Kai Weaver, John R. Algera, Hiddo Andika, Irham T. Brinch, Malte Chen, Chian-Chou Cochrane, Rachel Enia, Andrea Faisst, Andreas Gillman, Steven Gomez-Guijarro, Carlos Gozaliasl, Ghassem Hayward, Chris Kokorev, Vasily Merchant, Maya Rizzo, Francesca Talia, Margherita Valentino, Francesco Blánquez-Sesé, David Koekemoer, Anton M. Magnelli, Benjamin Rich, Michael Shuntov, Marko Astrophysics of Galaxies Optically dark dusty star-forming galaxies (DSFGs) play an essential role in massive galaxy formation at early cosmic time, however their nature remains elusive. Here we present a detailed case study of all the baryonic components of a $z=4.821$ DSFG, XS55. Selected from the ultra-deep COSMOS-XS 3GHz map with a red SCUBA-2 450$μ$m/850$μ$m colour, XS55 was followed up with ALMA 3mm line scans and spectroscopically confirmed to be at $z=4.821$ via detections of the CO(5-4) and [CI](1-0) lines. JWST/NIRCam imaging reveals that XS55 is a F150W-dropout with red F277W/F444W colour, and a complex morphology: a compact central component embedded in an extended structure with a likely companion. XS55 is tentatively detected in X-rays with both Chandra and XMM-Newton, suggesting an active galactic nucleus (AGN) nature. By fitting a panchromatic SED spanning NIR to radio wavelengths, we revealed that XS55 is a massive main-sequence galaxy with a stellar mass of $M_\ast=(5\pm1)\times10^{10}\,{\rm M_\odot}$ and a star formation rate of ${\rm SFR}=540\pm177~{\rm M_\odot\,yr^{-1}}$. The dust of XS55 is optically thick in the far infrared (FIR) with a surprisingly cold dust temperature of $T_{\rm dust}=33\pm2\,{\rm K}$, making XS55 one of the coldest DSFGs at $z>4$ known to date. This work unveils the nature of a radio-selected F150W-dropout, suggesting the existence of a population of DSFGs hosting active black holes embedded in optically thick dust. |
| title | Behind the dust veil: A panchromatic view of an optically dark galaxy at z=4.82 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2412.09363 |