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Chandra observations of galaxy zoo mergers: frequency of binary active nuclei in massive mergers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Keel, William C. Schwainski, Kevin Bonning, Erin W. Simmons, Brooke D. Treister, Ezequiel Urry, C. Megan Kaviraj, Sugata Cardamone, Carolin N. Lintott, Chris J. Teng, Stacy H. Darg, Dan W. Oh, Kyuseok |
| Copyright Year | 2012 |
| Description | We present the results from a Chandra pilot study of 12 massive mergers selected from Galaxy Zoo. The sample includes major mergers down to a host galaxy mass of 10(sup 11) solar mass that already have optical AGN signatures in at least one of the progenitors. We find that the coincidences of optically selected active nuclei with mildly obscured (N(sub H) less than or approximately 1.1 x 10(exp 22) per square centimeter) X-ray nuclei are relatively common (8/12), but the detections are too faint (less than 40 counts per nucleus; f(sub 2-10 keV) less than or approximately 1.2 x 10(exp -13) ergs per second per square centimeter) to separate starburst and nuclear activity as the origin of the X-ray emission. Only one merger is found to have confirmed binary X-ray nuclei, though the X-ray emission from its southern nucleus could be due solely to star formation. Thus, the occurrences of binary AGN in these mergers are rare (0-8%), unless most merger-induced active nuclei are very heavily obscured or Compton thick. |
| File Size | 2712491 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120013413 |
| Archival Resource Key | ark:/13960/t3c015w7h |
| Language | English |
| Publisher Date | 2012-04-23 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Active Galactic Nuclei Star Formation Galaxies Stellar Mass Starburst Galaxies Binary Stars X Ray Spectra X Ray Astrophysics Facility Contamination Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
