The role of AGN and obscuration in the position of the host galaxy relative to the main sequence
We use X-ray active galactic nuclei (AGN) observed by the Chandra X-ray Observatory within the 9.3 deg 2 Boötes field of the NDWFS to study whether there is a correlation between X-ray luminosity ( L X ) and star formation rate (SFR) of the host galaxy, at 0.5 < z
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2021-09, Vol.653 |
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| container_title | Astronomy and astrophysics (Berlin) |
| container_volume | 653 |
| creator | Mountrichas, G. Buat, V. Yang, G. Boquien, M. Burgarella, D. Ciesla, L. Malek, K. Shirley, R. |
| description | We use X-ray active galactic nuclei (AGN) observed by the Chandra X-ray Observatory within the 9.3 deg 2 Boötes field of the NDWFS to study whether there is a correlation between X-ray luminosity ( L X ) and star formation rate (SFR) of the host galaxy, at 0.5 < z |
| doi_str_mv | 10.1051/0004-6361/202140630 |
| format | Article |
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About half of the sources in the X-ray sample have spectroscopic redshifts. We also construct a reference galaxy catalogue. For both datasets we use photometric data from the optical to the far-infrared compiled by the HELP project, and apply spectral energy distribution fitting, using the X-CIGALE code. We exclude quiescent sources from both the X-ray and the reference samples. We also account for the mass completeness of our dataset, in different redshifts bins. Our analysis highlights the importance of studying the SFR– L X relation in a uniform manner, taking into account systematics and selection effects. Our results suggest, in less massive galaxies (log [ M * ( M ⊙ )] ∼ 11), that an AGN enhances the SFR of the host galaxy by ∼50% compared to non-AGN systems. A flat relation is observed for the most massive galaxies. The SFR norm does not evolve with redshift. The results, although tentative, are consistent with a scenario where, in less massive systems, both AGN and star formation are fed by cold gas supplied by a merger event. In more massive galaxies the flat relation could be explained by a different supermasssive black hole fuelling mechanism that is decoupled from the star formation of the host galaxy (e.g., hot diffuse gas). Finally, we compare the host galaxy properties of X-ray absorbed and unabsorbed sources. Our results show no difference, which suggests that X-ray absorption is not linked with the properties of the galaxy.</description><identifier>ISSN: 0004-6361</identifier><identifier>EISSN: 1432-0756</identifier><identifier>DOI: 10.1051/0004-6361/202140630</identifier><language>eng</language><publisher>EDP Sciences</publisher><subject>Astrophysics ; Cosmology and Extra-Galactic Astrophysics ; Sciences of the Universe</subject><ispartof>Astronomy and astrophysics (Berlin), 2021-09, Vol.653</ispartof><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0002-4193-2539 ; 0000-0003-0946-6176 ; 0000-0003-0541-2891 ; 0000-0003-3441-903X ; 0000-0001-8835-7722 ; 0000-0003-0541-2891 ; 0000-0003-0946-6176 ; 0000-0003-3441-903X ; 0000-0001-8835-7722 ; 0000-0002-4193-2539</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://hal.science/hal-03576991$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Mountrichas, G.</creatorcontrib><creatorcontrib>Buat, V.</creatorcontrib><creatorcontrib>Yang, G.</creatorcontrib><creatorcontrib>Boquien, M.</creatorcontrib><creatorcontrib>Burgarella, D.</creatorcontrib><creatorcontrib>Ciesla, L.</creatorcontrib><creatorcontrib>Malek, K.</creatorcontrib><creatorcontrib>Shirley, R.</creatorcontrib><title>The role of AGN and obscuration in the position of the host galaxy relative to the main sequence</title><title>Astronomy and astrophysics (Berlin)</title><description>We use X-ray active galactic nuclei (AGN) observed by the Chandra X-ray Observatory within the 9.3 deg 2 Boötes field of the NDWFS to study whether there is a correlation between X-ray luminosity ( L X ) and star formation rate (SFR) of the host galaxy, at 0.5 < z < 2.0, with respect to the position of the galaxy to the main sequence (SFR norm ). About half of the sources in the X-ray sample have spectroscopic redshifts. We also construct a reference galaxy catalogue. For both datasets we use photometric data from the optical to the far-infrared compiled by the HELP project, and apply spectral energy distribution fitting, using the X-CIGALE code. We exclude quiescent sources from both the X-ray and the reference samples. We also account for the mass completeness of our dataset, in different redshifts bins. Our analysis highlights the importance of studying the SFR– L X relation in a uniform manner, taking into account systematics and selection effects. Our results suggest, in less massive galaxies (log [ M * ( M ⊙ )] ∼ 11), that an AGN enhances the SFR of the host galaxy by ∼50% compared to non-AGN systems. A flat relation is observed for the most massive galaxies. The SFR norm does not evolve with redshift. The results, although tentative, are consistent with a scenario where, in less massive systems, both AGN and star formation are fed by cold gas supplied by a merger event. In more massive galaxies the flat relation could be explained by a different supermasssive black hole fuelling mechanism that is decoupled from the star formation of the host galaxy (e.g., hot diffuse gas). Finally, we compare the host galaxy properties of X-ray absorbed and unabsorbed sources. 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About half of the sources in the X-ray sample have spectroscopic redshifts. We also construct a reference galaxy catalogue. For both datasets we use photometric data from the optical to the far-infrared compiled by the HELP project, and apply spectral energy distribution fitting, using the X-CIGALE code. We exclude quiescent sources from both the X-ray and the reference samples. We also account for the mass completeness of our dataset, in different redshifts bins. Our analysis highlights the importance of studying the SFR– L X relation in a uniform manner, taking into account systematics and selection effects. Our results suggest, in less massive galaxies (log [ M * ( M ⊙ )] ∼ 11), that an AGN enhances the SFR of the host galaxy by ∼50% compared to non-AGN systems. A flat relation is observed for the most massive galaxies. The SFR norm does not evolve with redshift. The results, although tentative, are consistent with a scenario where, in less massive systems, both AGN and star formation are fed by cold gas supplied by a merger event. In more massive galaxies the flat relation could be explained by a different supermasssive black hole fuelling mechanism that is decoupled from the star formation of the host galaxy (e.g., hot diffuse gas). Finally, we compare the host galaxy properties of X-ray absorbed and unabsorbed sources. 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| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; EDP Sciences; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Astrophysics Cosmology and Extra-Galactic Astrophysics Sciences of the Universe |
| title | The role of AGN and obscuration in the position of the host galaxy relative to the main sequence |
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