4C 02.27: what is inside a double-double radio quasar?

2010/12/14 by S. Frey, Frey, S., Z. Paragi +1
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #astro-ph.CO

paper · pdf · doi:10.48550/arxiv.1012.2992

4 pages, 2 figures, to appear in the proceedings of the 10th European VLBI Network Symposium (September 20-24, 2010, Manchester, UK). Proceedings of Science (http://pos.sissa.it), PoS(10th EVN Symposium)077

arxiv created 2010/12/14 · arxiv updated 2010/12/15

Abstract

Recently Jamrozy et al. (2009) identified 4C 02.27 (J0935+0204) as the first possible example of a double-double radio source which is optically identified with a quasar (i.e. not a galaxy), at the redshift of z=0.649. The overall projected angular size of the radio source reaches about 1.5', with a prominent "core" component in the centre. The two opposite pairs of radio lobes might indicate two periods of episodic activity. We report on our short exploratory 1.6-GHz Very Long Baseline Interferometry (VLBI) observations of the innermost radio structure of the quasar, conducted with the electronic European VLBI Network (e-EVN) on 2009 September 30. These revealed a milliarcsecond-scale compact source which is the base of the approaching one of the two symmetric relativistic jets currently supplying the hot spots in the inner pair of the arcsecond-scale radio lobes in 4C 02.27.

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