Galaxies at z=2: extensions around radio-quiet QSOs

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dc.creatorAretxaga, I.
dc.creatorBoyle, B. J.
dc.creatorTerlevich, R. J.
dc.date1995-10-08
dc.date.accessioned2026-07-07T02:20:16Z
dc.date.available2026-07-07T02:20:16Z
dc.descriptionWe have been conducting an imaging survey to detect host galaxies of radio-quiet QSOs at high redshift (z = 2), in order to compare them with those of radio-loud objects. Six QSOs were observed in the R passband with the auxiliary port of the 4.2m WHT of the {\it Observatorio de Roque de los Muchachos} indir August 1994. The objects were selected to be bright (M(B) < -28$~mag) and have bright stars in the field, which could enable us to define the point spread function (PSF) accurately. The excellent seeing of La Palma (<0.9 arcsec thoughout the run) allowed us to detect extensions to the nuclear PSFs around three (one radio-loud and two radio-quiet) QSOs, out of 4 suitable targets. The extensions are most likely due to the host galaxies of these QSOs, with luminosities of at least 3-7% of the QSO luminosity. The most likely values for the luminosity of the host galaxies lie in the range 6-18% of the QSO luminosity. Our observations show that, if the extensions we have detected are indeed galaxies, extraordinary massive and luminous galaxies are not only a characteristic of radio-loud objects, but of QSOs as an entire class.
dc.descriptionuuencoded compressed postscript. The preprint is also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html
dc.identifierhttps://arxiv.org/abs/astro-ph/9510047
dc.identifierhttp://arxiv.org/abs/astro-ph/9510047
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/10161
dc.subjectAstrophysics
dc.titleGalaxies at z=2: extensions around radio-quiet QSOs
dc.typetext

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