| DOI | Resolve DOI: https://doi.org/10.1088/0004-637X/731/1/60 |
|---|
| Author | Search for: Grier, C. J.; Search for: Mathur, S.; Search for: Ghosh, H.; Search for: Ferrarese, L.1 |
|---|
| Affiliation | - National Research Council of Canada. NRC Herzberg Institute of Astrophysics
|
|---|
| Format | Text, Article |
|---|
| Subject | galaxies: active; galaxies: nuclei; X-rays: galaxies |
|---|
| Abstract | 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. |
|---|
| Publication date | 2011-03-23 |
|---|
| Publisher | American Astronomical Society
IOP Publishing |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 19775306 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 8a7ca95c-125f-491f-8705-9d14e500ce2b |
|---|
| Record created | 2012-04-05 |
|---|
| Record modified | 2020-04-21 |
|---|
