Sensitive Radio Observations of High Redshift Dusty QSOs

We present sensitive radio continuum imaging at 1.4 GHz and 4.9 GHz of seven high redshift QSOs selected for having a 240 GHz continuum detection, which is thought to be thermal dust emission. We detect radio continuum emission from four of the sources: BRI 0952-0115, BR 1202-0725, LBQS 1230+1627B,...

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Bibliographic Details
Published in:arXiv.org 1999-09
Main Authors: Yun, M S, Carilli, C L, Kawabe, R, Tutui, Y, Kohno, K, Ohta, K
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astronomical models
Continuum radiation
Emission
Empirical analysis
Galaxies
Galaxy distribution
Gravitational lenses
Luminosity
Massive stars
Radio astronomy
Radio jets (astronomy)
Radio observation
Radio sources (astronomy)
Red shift
Spectra
Spectral energy distribution
Star & galaxy formation
Star formation
Starburst galaxies
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Summary:We present sensitive radio continuum imaging at 1.4 GHz and 4.9 GHz of seven high redshift QSOs selected for having a 240 GHz continuum detection, which is thought to be thermal dust emission. We detect radio continuum emission from four of the sources: BRI 0952-0115, BR 1202-0725, LBQS 1230+1627B, and BRI 1335-0417. The radio source in BR 1202-0725 is resolved into two components, coincident with the double mm and CO sources. We compare the results at 1.4 GHz and 240 GHz to empirical and semi-analytic spectral models based on star forming galaxies at low redshift. The radio-to-submm spectral energy distribution for BR 1202-0725, LBQS 1230+1627B, and BRI 1335-0417 are consistent with that expected for a massive starburst galaxy, with implied massive star formation rates of order 1000 solar masses per year (without correcting for possible amplification by gravitational lensing). The radio-to-submm spectral energy distribution for BRI 0952-0115 suggests a low-luminosity radio jet source driven by the AGN.
ISSN:2331-8422
DOI:10.48550/arxiv.9909361