Abstract
We systematically investigate the near- to far-infrared (FIR) photometric properties of a nearly complete sample of local active galactic nuclei (AGNs) detected in the Swift/Burst Alert Telescope (BAT) all-sky ultra-hard X-ray (14-195 keV) survey. Out of 606 non-blazar AGNs in the Swift/BAT 70 month catalog at high galactic latitudes of(b) > 10° , we obtain IR photometric data of 604 objects by cross-matching the AGN positions with catalogs from the WISE, AKARI, IRAS, and Herschel infrared observatories. We find a good correlation between the ultra-hard X-ray and mid-IR luminosities over five orders of magnitude (41 < log L14-195 < 46). Informed by previous measurements of the intrinsic spectral energy distribution of AGNs, we find FIR pure-AGN candidates whose FIR emission is thought to be AGN-dominated with low star-formation activity. We demonstrate that the dust covering factor decreases with the bolometric AGN luminosity, confirming the luminosity-dependent unified scheme. We also show that the completeness of the WISE color-color cut in selecting Swift/BAT AGNs increases strongly with 14-195 keV luminosity.
Original language | English |
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Article number | 74 |
Journal | Astrophysical Journal |
Volume | 835 |
Issue number | 1 |
DOIs | |
State | Published - 20 Jan 2017 |
Externally published | Yes |
Keywords
- X-rays: galaxies
- galaxies: active
- galaxies: nuclei
- infrared: galaxies
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science