On the nature of QSO host galaxies

Details On the nature of QSO host galaxies On the nature of QSO host galaxies

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306...64s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 1, 1986, p. 64-89.

Astronomy and Astrophysics

Astrophysics

185

Galactic Nuclei, Galactic Structure, Image Analysis, Quasars, Active Galactic Nuclei, Astronomical Spectroscopy, Cosmology, Data Processing, Galactic Evolution, Luminosity, Red Shift

Scientific paper

Results of an analysis of deep images of 31 low-redshift QSOs and lower luminosity QSO/AGNs obtained with the prime focus CCD system on the CTIO 4 m telescope are presented. The host galaxies of QSOs are generally luminous systems populating the exponential tail of the galaxy luminosity function. Seyfert galaxies are apparently less luminous than the hosts of radio-quiet QSOs. The radio-loud QSOs are more luminous than the radio-quiet QSO hosts. For the sample of QSOs and QSO/AGNs, there is a trend for the radio-loud hosts to be better fitted by elliptical galaxy models and for the radio-quiet hosts to be fitted by disk galaxies, suggesting that the dichotomy known to exist between Seyfert and radio galaxies extends to much higher levels of nuclear luminosity. These results strengthen the empirical basis for a continuity in properties between Seyfert galaxies and radio-quite QSOs and between radio galaxies and radio-loud QSOs.

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