High density of active galactic nuclei in the outskirts of distant galaxy clusters
International audience We present a study of the distribution of X-ray detected active galactic nuclei (AGN) in the five most massive, M500SZ > 1014 M⊙, and distant, z ∼ 1, galaxy clusters in the Planck and South Pole Telescope (SPT) surveys. The spatial and thermodynamic individual properties of...
Published in: | Astronomy & Astrophysics |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476/document https://hal.archives-ouvertes.fr/hal-02073476/file/aa35082-19.pdf https://doi.org/10.1051/0004-6361/201935082 |
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ftccsdartic:oai:HAL:hal-02073476v1 2023-05-15T18:22:53+02:00 High density of active galactic nuclei in the outskirts of distant galaxy clusters Koulouridis, E. Bartalucci, I. Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7) 2019 https://hal.archives-ouvertes.fr/hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476/document https://hal.archives-ouvertes.fr/hal-02073476/file/aa35082-19.pdf https://doi.org/10.1051/0004-6361/201935082 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201935082 info:eu-repo/semantics/altIdentifier/arxiv/1903.02919 hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476/document https://hal.archives-ouvertes.fr/hal-02073476/file/aa35082-19.pdf INSPIRE: 1724146 doi:10.1051/0004-6361/201935082 ARXIV: 1903.02919 info:eu-repo/semantics/OpenAccess ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.archives-ouvertes.fr/hal-02073476 Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 623, pp.L10. ⟨10.1051/0004-6361/201935082⟩ large-scale structure of Universe galaxies: interactions galaxies: evolution X-rays: galaxies: clusters galaxies: clusters: general galaxies: active [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1051/0004-6361/201935082 2021-10-24T00:45:40Z International audience We present a study of the distribution of X-ray detected active galactic nuclei (AGN) in the five most massive, M500SZ > 1014 M⊙, and distant, z ∼ 1, galaxy clusters in the Planck and South Pole Telescope (SPT) surveys. The spatial and thermodynamic individual properties of each cluster have been defined with unprecedented accuracy at this redshift using deep X-ray observations. This is an essential property of our sample in order to precisely determine the R500Yx radius of the clusters. For our purposes, we computed the X-ray point-like source surface density in 0.5 R500Yx wide annuli up to a clustercentric distance of 4 R500Yx, statistically subtracting the background and accounting for the respective average density of optical galaxies. We found a significant excess of X-ray point sources between 2 and 2.5 R500Yx at the 99.9% confidence level. The results clearly display for the first time strong observational evidence of AGN triggering in the outskirts of high-redshift massive clusters with such a high statistical significance. We argue that the particular conditions at this distance from the cluster centre increase the galaxy merging rate, which is probably the dominant mechanism of AGN triggering in the outskirts of massive clusters.Key words: galaxies: active / galaxies: clusters: general / X-rays: galaxies: clusters / galaxies: evolution / galaxies: interactions / large-scale structure of Universe Article in Journal/Newspaper South pole Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Ray Point ENVELOPE(-101.100,-101.100,59.575,59.575) South Pole Astronomy & Astrophysics 623 L10 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
large-scale structure of Universe galaxies: interactions galaxies: evolution X-rays: galaxies: clusters galaxies: clusters: general galaxies: active [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
spellingShingle |
large-scale structure of Universe galaxies: interactions galaxies: evolution X-rays: galaxies: clusters galaxies: clusters: general galaxies: active [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Koulouridis, E. Bartalucci, I. High density of active galactic nuclei in the outskirts of distant galaxy clusters |
topic_facet |
large-scale structure of Universe galaxies: interactions galaxies: evolution X-rays: galaxies: clusters galaxies: clusters: general galaxies: active [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience We present a study of the distribution of X-ray detected active galactic nuclei (AGN) in the five most massive, M500SZ > 1014 M⊙, and distant, z ∼ 1, galaxy clusters in the Planck and South Pole Telescope (SPT) surveys. The spatial and thermodynamic individual properties of each cluster have been defined with unprecedented accuracy at this redshift using deep X-ray observations. This is an essential property of our sample in order to precisely determine the R500Yx radius of the clusters. For our purposes, we computed the X-ray point-like source surface density in 0.5 R500Yx wide annuli up to a clustercentric distance of 4 R500Yx, statistically subtracting the background and accounting for the respective average density of optical galaxies. We found a significant excess of X-ray point sources between 2 and 2.5 R500Yx at the 99.9% confidence level. The results clearly display for the first time strong observational evidence of AGN triggering in the outskirts of high-redshift massive clusters with such a high statistical significance. We argue that the particular conditions at this distance from the cluster centre increase the galaxy merging rate, which is probably the dominant mechanism of AGN triggering in the outskirts of massive clusters.Key words: galaxies: active / galaxies: clusters: general / X-rays: galaxies: clusters / galaxies: evolution / galaxies: interactions / large-scale structure of Universe |
author2 |
Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7) |
format |
Article in Journal/Newspaper |
author |
Koulouridis, E. Bartalucci, I. |
author_facet |
Koulouridis, E. Bartalucci, I. |
author_sort |
Koulouridis, E. |
title |
High density of active galactic nuclei in the outskirts of distant galaxy clusters |
title_short |
High density of active galactic nuclei in the outskirts of distant galaxy clusters |
title_full |
High density of active galactic nuclei in the outskirts of distant galaxy clusters |
title_fullStr |
High density of active galactic nuclei in the outskirts of distant galaxy clusters |
title_full_unstemmed |
High density of active galactic nuclei in the outskirts of distant galaxy clusters |
title_sort |
high density of active galactic nuclei in the outskirts of distant galaxy clusters |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476/document https://hal.archives-ouvertes.fr/hal-02073476/file/aa35082-19.pdf https://doi.org/10.1051/0004-6361/201935082 |
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ENVELOPE(-101.100,-101.100,59.575,59.575) |
geographic |
Ray Point South Pole |
geographic_facet |
Ray Point South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.archives-ouvertes.fr/hal-02073476 Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 623, pp.L10. ⟨10.1051/0004-6361/201935082⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201935082 info:eu-repo/semantics/altIdentifier/arxiv/1903.02919 hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476 https://hal.archives-ouvertes.fr/hal-02073476/document https://hal.archives-ouvertes.fr/hal-02073476/file/aa35082-19.pdf INSPIRE: 1724146 doi:10.1051/0004-6361/201935082 ARXIV: 1903.02919 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/0004-6361/201935082 |
container_title |
Astronomy & Astrophysics |
container_volume |
623 |
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L10 |
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1766202294278291456 |