| DOI | Trouver le DOI : https://doi.org/10.1088/0004-637X/731/1/60 |
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| Auteur | Rechercher : Grier, C. J.; Rechercher : Mathur, S.; Rechercher : Ghosh, H.; Rechercher : Ferrarese, L.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Sujet | galaxies: active; galaxies: nuclei; X-rays: galaxies |
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| Résumé | We present the results of a search for nuclear X-ray activity in nearby galaxies using Chandra archival data in a sample of 62 galaxies from the Spitzer Infrared Nearby Galaxy Survey. We detect 37 nuclear X-ray sources; seven of these are new detections. Most of the nuclear X-ray sources are likely to be active galactic nuclei (AGNs). The fraction of galaxies hosting AGNs is thus about 60%, much higher than that found with optical searches, and demonstrates the efficacy of X-ray observations to find hidden AGNs in optically normal galaxies. We find that the nuclear X-ray sources are preferentially present in earlier type galaxies. Unlike what is observed at high redshift for high-luminosity AGNs, we do not find a strong correlation between the AGN luminosity and the 24 mu m luminosity of the host galaxy; we find a strong correlation with the 3.6 mu m luminosity instead. This suggests that at the present epoch, the accretion rate depends on the total mass of the galaxy, as perhaps does the black hole mass. |
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| Date de publication | 2011-03-23 |
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| Maison d’édition | American Astronomical Society
IOP Publishing |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 19775306 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 8a7ca95c-125f-491f-8705-9d14e500ce2b |
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| Enregistrement créé | 2012-04-05 |
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| Enregistrement modifié | 2020-04-21 |
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