COSMOS2020: Investigating the AGN-obscured accretion phase at $z\sim 1$ via [NeV] selection
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911990411165696 |
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| author | Barchiesi, L. Vignali, C. Pozzi, F. Gilli, R. Mignoli, M. Gruppioni, C. Lapi, A. Marchesi, S. Ricci, F. Urry, C. M. |
| author_facet | Barchiesi, L. Vignali, C. Pozzi, F. Gilli, R. Mignoli, M. Gruppioni, C. Lapi, A. Marchesi, S. Ricci, F. Urry, C. M. |
| contents | We investigated the properties of 94 [NeV]3426AA-selected type 2 AGN in COSMOS at z=0.6-1.2, performing optical-to-far-infrared spectral energy distribution fitting. In addition, we analyze the X-ray spectra of the X-ray-detected sources to obtain reliable values of the AGN obscuration and intrinsic luminosity.
We found that more than two-thirds of our sample is composed of very obscured sources, with about 20% of the sources being candidate CT-AGN and half being AGNs in a strong phase of accretion. With respect to non-active galaxies, we find a higher fraction of sources within the main sequence and little evidence for AGNs quenching the SF. The comparison with the prediction from the in situ co-evolution model suggests that [NeV] is an effective tool for selecting galaxies in the obscured growth phase of the BH-galaxy co-evolution paradigm. We find that the "quenching phase" is still to come for most of the sample and only few galaxies show evidence of quenched SF activity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_03251 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | COSMOS2020: Investigating the AGN-obscured accretion phase at $z\sim 1$ via [NeV] selection Barchiesi, L. Vignali, C. Pozzi, F. Gilli, R. Mignoli, M. Gruppioni, C. Lapi, A. Marchesi, S. Ricci, F. Urry, C. M. Astrophysics of Galaxies High Energy Astrophysical Phenomena We investigated the properties of 94 [NeV]3426AA-selected type 2 AGN in COSMOS at z=0.6-1.2, performing optical-to-far-infrared spectral energy distribution fitting. In addition, we analyze the X-ray spectra of the X-ray-detected sources to obtain reliable values of the AGN obscuration and intrinsic luminosity. We found that more than two-thirds of our sample is composed of very obscured sources, with about 20% of the sources being candidate CT-AGN and half being AGNs in a strong phase of accretion. With respect to non-active galaxies, we find a higher fraction of sources within the main sequence and little evidence for AGNs quenching the SF. The comparison with the prediction from the in situ co-evolution model suggests that [NeV] is an effective tool for selecting galaxies in the obscured growth phase of the BH-galaxy co-evolution paradigm. We find that the "quenching phase" is still to come for most of the sample and only few galaxies show evidence of quenched SF activity. |
| title | COSMOS2020: Investigating the AGN-obscured accretion phase at $z\sim 1$ via [NeV] selection |
| topic | Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.03251 |