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Host Galaxies of Quasars

  • J. W. Fried
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)

Summary

Properties of host galaxies of low redshift quasars are reviewed. There is good evidence that radio-loud quasars sit in bright elliptical galaxies, whereas optical and X-ray quasars reside in spiral galaxies. The host galaxies of radio-loud quasars are brighter by ∼ 2 mag than those of radio-quiet ones; the brightest ones have luminosities comparable to those of brightest cluster galaxies. The neighborhood of quasars has higher than average galaxy density; tidal interactions with the host galaxies are frequently observed.

A preliminary analysis of a survey of 15 radio-loud quasars with redshifts from 0.3 to 3.4 yields the result expected for cosmological redshifts that host galaxies and neighboring galaxies are detected only for the low-redshift objects.

Very deep surfacephotometry of 2 radio-loud low-redshift quasars shows that in one case (1635+119, z = 0.146) the host galaxy can very well be fitted by an elliptical galaxy over 3 orders in intensity; the host galaxy of 4C14.83 (z = 0.237) is strongly asymmetric and can not be well fitted by either elliptical or spiral galaxy.

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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • J. W. Fried
    • 1
  1. 1.Max-Planck-Institut für AstronomieHeidelberg 1West Germany

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