A sample of radio-loud QSOs at redshift ~ 4

J. Holt,C. R. Benn,M. Vigotti,M. Pedani,R. Carballo,J. I. Gonzalez-Serrano,K.-H. Mack,B. Garcia

Monthly Notices of the Royal Astronomical Society（2004）

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摘要

We obtained spectra of 60 red, star-like objects (E 1 mJy. Eight are quasi-stellar objects (QSOs) with redshift z > 3.6. Combined with our earlier pilot search, our sample of 121 candidates yields a total of 18 z > 3.6 QSOs (10 of these with z > 4.0). 8 per cent of candidates with S1.4 GHz ...

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关键词

quasars: emission lines,quasars: general,early Universe,radio continuum: galaxies

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