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2.2 and 1300 μm observations of a complete sample of southern quasars

Show simple item record Chini R. en Kreysa E. en Wargau W.F. en 2012-11-01T16:31:40Z 2012-11-01T16:31:40Z 1997 en
dc.identifier.citation Astronomy and Astrophysics en
dc.identifier.citation 318 en
dc.identifier.citation 1 en
dc.identifier.issn 46361 en
dc.description.abstract We present 2.2 and 1300 μm data of a complete sample of optically selected southern quasars. All objects have 1300 μm flux densities below ≈ 20 mJy (3σ), except QSO 0448 - 392 which shows a faint signal of ≈ 40 mJy. These results clearly indicate that previously claimed detections at Jy level must have been erroneous. The 2.2 μm data allow the determination of the spectral turnover at short wavelengths and define the spectral slope between IR and radio wavelengths. The sample can be divided into two categories of 7 radio-loud and 10 radio-quiet quasars. The radio-loud quasars have redshifts between z = 1.3 and 3.2 and their energy distributions do not differ significantly from nearby quasars; the emission from cm to mm wavelengths is due to synchrotron radiation. The analysis of the radio-quiet quasars does not show any conclusive evidence for thermal components apart from QSO 0530-379 where the FIR emission is probably dominated by thermal radiation from dust. en
dc.language.iso en en
dc.subject Galaxies: ISM; Infrared: galaxies; Quasars: general; Radiation mechanisms: non thermal; Radio continuum: galaxies en
dc.title 2.2 and 1300 μm observations of a complete sample of southern quasars en
dc.type Article en

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