The hosts of z=2 QSOs
Itziar Aretxaga, Brian J. Boyle, Roberto J. Terlevich
Abstract
We present results of the hosts of four high-redshift (z ≈ 2) and high luminosity (MB -28 mag) QSOs, three radio-quiet one radio-loud, imaged in R and K bands. The extensions to the nuclear unresolved source are most likely due to the hosts galaxies of these QSOs, with luminosities at rest-frame 2300Åof at least 3-7% of the QSO luminosity, and most likely around 6-18% of the QSO luminosity. Our observations show that, if the extensions we have detected are indeed galaxies, extraordinary big and luminous host galaxies are not only a characteristic of radio-loud objects, but of QSOs as an entire class.
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