The host galaxies and environment of <i>Chandra</i>-selected active galactic nuclei in the deep ACS GTO cluster fields

Simple item page
dc.contributor.authorMartel, Andre R.
dc.contributor.authorMenanteau, Felipe
dc.contributor.authorTozzi, Paolo
dc.contributor.authorFord, Holland C.
dc.contributor.authorInfante, Leopoldo
dc.date.accessioned2025-01-21T01:05:45Z
dc.date.available2025-01-21T01:05:45Z
dc.date.issued2007
dc.description.abstractWe present catalogs and images of optical counterparts to the Chandra-selected X-ray sources found in the fields of the five clusters RX J0152-1357, RX J0849+4452, RDCS J0910+5422, MS 1054-0321, and RDCS J1252-2927, which were imaged with the Advanced Camera for Surveys as part of the ACS Guaranteed Time Observer programs. A total of 98 X-ray sources fall within the ACS mosaics, and positive identifications are made for similar to 96% of them, including confirmed cluster members. We classify the sources as active galactic nuclei (AGNs) or QSOs depending on their X-ray output. The log N(>S)-log S test indicates a significant overdensity of X-ray sources in the RX J0152-1357, RDCS J0910+5422, and MS 1054-0321 fields with respect to the CDF-S, suggesting an association of some X-ray sources with the large-scale structure of the clusters. From the asymmetry and concentration indices, similar to 52% of the optical counterparts are early-type galaxies, similar to 35%late- type, and the remainder irregular. A blue core is found in approximately half of the early-type galaxies. From visual examination, approximately 40% of the counterparts possess an unresolved nucleus, a common signature of nuclear activity. A majority of these nuclei are found in near face-on late-type galaxies although selection effects might be important. The X-ray to optical flux ratio of the nuclei correlates with the inclination angle of the late-type galaxies but not of the early types, as expected if dust is significant in the circumnuclear regions. The AGNs possess a similar to 50% excess of nearby companions compared to the overall galaxy population in the same fields. The surface density of the X-ray sources is highest at projected radii of less than or similar to 1 Mpc from the cluster center and relatively flat at larger radii. We describe the morphology and environment of the cluster members and compare them with the other optical counterparts.
dc.fuente.origenWOS
dc.identifier.eissn1538-4365
dc.identifier.issn0067-0049
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96009
dc.identifier.wosidWOS:000243387200002
dc.issue.numero1
dc.language.isoen
dc.pagina.final57
dc.pagina.inicio19
dc.revistaAstrophysical journal supplement series
dc.rightsacceso restringido
dc.subjectgalaxies : active
dc.subjectgalaxies : clusters : general
dc.subjectgalaxies : clusters : individual (RX J0152-1357, RX J0849+4452, RDCS J0910+5422, MS 1054-0321, RDCS J1252-2927)
dc.subjectX-rays : galaxies : clusters
dc.titleThe host galaxies and environment of <i>Chandra</i>-selected active galactic nuclei in the deep ACS GTO cluster fields
dc.typeartículo
dc.volumen168
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas