PKS 0116+082: An Optically Variable Compact Steep-Spectrum Source in an NLRG

Details PKS 0116+082: An Optically Variable Compact Steep-Spectrum Source in an NLRG PKS 0116+082: An Optically Variable Compact Steep-Spectrum Source in an NLRG

1997-03-26

arxiv.org/abs/astro-ph/9703177v1

Astronomy and Astrophysics

Astrophysics

24 pages, 6 figures, to appear in July 1997 ApJ

Scientific paper

10.1086/304328

Polarimetry of the narrow-line radio galaxy PKS 0116+082 at the W.M. Keck telescope shows that it has high and variable optical polarization, presumably due to synchrotron radiation. It is not a BL Lac object because it has strong narrow lines, and it is not an OVV quasar because it has no broad lines and the extended galaxy is prominent. VLA and VLBA images show that it is a compact steep-spectrum radio source with most of the emission coming from a region less than 100 milli-arcsec in size. Of the 25 compact steep-spectrum or gigahertz peaked-spectrum sources measured polarimetrically, four have high optical polarization. One of these has been observed only once but in the other three the polarization is variable. This gives an intriguing hint that variability may be a general property of these objects.

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