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...
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ftunivnantes:oai:HAL:hal-02073476v1 2023-05-15T18:22:56+02:00 High density of active galactic nuclei in the outskirts of distant galaxy clusters Koulouridis, E. Bartalucci, I. Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) 2019 https://hal.science/hal-02073476 https://hal.science/hal-02073476/document https://hal.science/hal-02073476/file/aa35082-19.pdf https://doi.org/10.1051/0004-6361/201935082 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/1903.02919 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201935082 hal-02073476 https://hal.science/hal-02073476 https://hal.science/hal-02073476/document https://hal.science/hal-02073476/file/aa35082-19.pdf ARXIV: 1903.02919 doi:10.1051/0004-6361/201935082 INSPIRE: 1724146 info:eu-repo/semantics/OpenAccess Astron.Astrophys. https://hal.science/hal-02073476 Astron.Astrophys., 2019, 623, pp.L10. ⟨10.1051/0004-6361/201935082⟩ galaxies: active galaxies: clusters: general X-rays: galaxies: clusters galaxies: evolution galaxies: interactions large-scale structure of Universe [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.1051/0004-6361/201935082 2023-03-08T03:54:28Z 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 Université de Nantes: HAL-UNIV-NANTES Ray Point ENVELOPE(-101.100,-101.100,59.575,59.575) South Pole Astronomy & Astrophysics 623 L10 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
galaxies: active galaxies: clusters: general X-rays: galaxies: clusters galaxies: evolution galaxies: interactions large-scale structure of Universe [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
spellingShingle |
galaxies: active galaxies: clusters: general X-rays: galaxies: clusters galaxies: evolution galaxies: interactions large-scale structure of Universe [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 |
galaxies: active galaxies: clusters: general X-rays: galaxies: clusters galaxies: evolution galaxies: interactions large-scale structure of Universe [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 (UMR7158 / UMR_E_9005 / UM_112)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) |
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.science/hal-02073476 https://hal.science/hal-02073476/document https://hal.science/hal-02073476/file/aa35082-19.pdf https://doi.org/10.1051/0004-6361/201935082 |
long_lat |
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 |
Astron.Astrophys. https://hal.science/hal-02073476 Astron.Astrophys., 2019, 623, pp.L10. ⟨10.1051/0004-6361/201935082⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/1903.02919 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201935082 hal-02073476 https://hal.science/hal-02073476 https://hal.science/hal-02073476/document https://hal.science/hal-02073476/file/aa35082-19.pdf ARXIV: 1903.02919 doi:10.1051/0004-6361/201935082 INSPIRE: 1724146 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/0004-6361/201935082 |
container_title |
Astronomy & Astrophysics |
container_volume |
623 |
container_start_page |
L10 |
_version_ |
1766202351577726976 |