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| Paper: |
The Hosts of Ultraluminous Infrared Galaxies |
| Volume: |
197, XVth IAP Meeting Dynamics of Galaxies: From the Early Universe to the Present |
| Page: |
295 |
| Authors: |
Sanders, D. B.; Kim, D. C.; Mazzarella, J. M.; Surace, J. A.; Jensen, J. B. |
| Abstract: |
Complete samples of ultraluminous infrared galaxies (ULIGs footnote Lir ≡ L(8-1000 microns) > 1012 Lodot; unless otherwise stated, Ho = 75 km s-1 Mpc-1, qo = 0) have been imaged at R-band and K-band from Mauna Kea. Here we present a preliminary analysis of the host galaxy magnitudes and the 1-D radial profiles for a subset of objects in the IRAS 1-Jy sample of ULIGs (z < 0.3), and compare these properties with recently published data for ``low-z" QSOs. ULIGs in the 1-Jy sample reside in luminous hosts, with mean luminosities ~ 2.7 LKast (ΔK ~0.7--11 LKast), and ~2.2 LRast (ΔR ~ 0.5--9 LRast), values which are remarkably similar in the mean and range for the hosts of low-z QSOs. Approximately one-third of ULIGs have single nuclei and radial profiles that are closely approximated by a r1/4-law over the inner ~ 2--10 kpc radius. These ``E-like" hosts have half-light radii, and surface brightness (r1/2, μ1/2) similar to QSO hosts at R-band, but systematically smaller half-light radii than QSOs at K-band. |
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