Formation Of Sub-Structure In Luminous Submillimeter galaxies (FOSSILS): Initial sample and the discovery of a dusty spiral at Cosmic Noon
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909805772275712 |
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| author | Ikeda, Ryota Iono, Daisuke Tadaki, Ken-ichi Silva, Andrea Team, the FOSSILS |
| author_facet | Ikeda, Ryota Iono, Daisuke Tadaki, Ken-ichi Silva, Andrea Team, the FOSSILS |
| contents | High-resolution far-infrared (FIR) observation of submillimeter galaxies (SMGs) is an effective approach to study the formation of sub-structures in the early epoch of massive galaxies. We present the 870$μ$m continuum images resolved down to sub-kpc scales for 12 SMGs taken by Atacama Large Millimeter/Submillimeter Array (ALMA) as an initial sample of the FOSSILS Survey. We discovered a wide variety of morphological properties, including a two-arm spiral galaxy at $z=2.5$ possibly induced by a tidal interaction with a minor companion. Nonetheless, about half of the sample exhibit a compact and circular morphology, which is reminiscent of optical morphology of compact quiescent galaxies. Future studies with larger sample and combination of the rest-frame optical images taken by James Webb Space Telescope will shed light on the various evolutionary track of SMGs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20720 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Formation Of Sub-Structure In Luminous Submillimeter galaxies (FOSSILS): Initial sample and the discovery of a dusty spiral at Cosmic Noon Ikeda, Ryota Iono, Daisuke Tadaki, Ken-ichi Silva, Andrea Team, the FOSSILS Astrophysics of Galaxies High-resolution far-infrared (FIR) observation of submillimeter galaxies (SMGs) is an effective approach to study the formation of sub-structures in the early epoch of massive galaxies. We present the 870$μ$m continuum images resolved down to sub-kpc scales for 12 SMGs taken by Atacama Large Millimeter/Submillimeter Array (ALMA) as an initial sample of the FOSSILS Survey. We discovered a wide variety of morphological properties, including a two-arm spiral galaxy at $z=2.5$ possibly induced by a tidal interaction with a minor companion. Nonetheless, about half of the sample exhibit a compact and circular morphology, which is reminiscent of optical morphology of compact quiescent galaxies. Future studies with larger sample and combination of the rest-frame optical images taken by James Webb Space Telescope will shed light on the various evolutionary track of SMGs. |
| title | Formation Of Sub-Structure In Luminous Submillimeter galaxies (FOSSILS): Initial sample and the discovery of a dusty spiral at Cosmic Noon |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2509.20720 |