Quasars and Ultraluminous Infrared Galaxies: At the Limit? | Zendy

Kim K. McLeod | Zendy; G. H. Rieke | Zendy; Lisa J. StorrieLombardi | Zendy

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Quasars and Ultraluminous Infrared Galaxies: At the Limit?

Author(s) -

Kim K. McLeod,

G. H. Rieke,

Lisa J. StorrieLombardi

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311848

Subject(s) - quasar , physics , astrophysics , luminous infrared galaxy , galaxy , luminosity , radio galaxy , astronomy , infrared , eddington luminosity , peculiar galaxy , galaxy group

We have detected the host galaxies of 16 nearby, radio-quiet quasars usingimages obtained with the Near-Infrared Camera and Multi-Object Spectrometer(NICMOS). We confirm that these luminous quasars tend to live in luminous,early-type host galaxies, and we use the host-galaxy magnitudes to refine theluminosity/host-mass limit inferred from ground-based studies. If quasars obeythe relation $M_{black hole}/M_{spheroid}\sim0.006$ found for massive darkobjects in nonactive galaxies, then our analysis implies that they radiate atup to $\sim20%$ of the Eddington rate. An analogous analysis for ultraluminousinfrared galaxies shows them to accrete at up to similar Eddington fractions,consistent with the hypothesis that some of them are powered by embeddedquasars.Comment: 9 pages, includes 2 eps figs, accepted to ApJLet

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