Extragalactic sources with asymmetric radio structure II. further observations of the quasar B2 1320 + 299 |
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| Authors: | T J Cornwell D J Saikia P Shastri L Feretti G Giovannini P Parma C J Salter |
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| Institution: | (1) National Radio Astronomy Observatory, Post Box 0, 87801 Socorro, New Mexico, USA;(2) Nuffield Radio Astronomy Laboratories, Jodrell Bank, SKI1 9DL Macclesfield, Cheshire, UK;(3) Istituto di Radioastronomia, Via Irnerio 46, I-40126 Bologna, Italy;(4) Institut de Radioastronomie Millimetrique, Avenida Divina Pastora 7, 18012 Nucleo Central, Granada, Spain;(5) Present address: Radio Astronomy Centre, Tata Institute of Fundamental Research, Post Box 1234, 560012 Bangalore |
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| Abstract: | We present VLA A-array observations at λ20, 6 and 2 cm and B-array observations at λ20 and 6 cm of the quasar B2 1320 + 299,
which has a very unusual radio structure. In addition to a component, A, coincident with the quasar, there are two lobes of
radio emission, B and C, on the same side of A. These are located at distances of -25 and 50 arcsec respectively from A. The
present observations show that A has a flat-spectrum component coincident with the quasar and a weak outer component at a
distance of-4 arcsec along PA - 100°. The morphology of B resembles a head-tail type of structure with its tail towards the
north-east. The magnetic field lines in component B appear to follow the bend in the tail. Component C exhibits some extension
towards the north-west. We discuss the possible nature of B2 1320 + 299 and suggest that while A appears to be an independent
source, the relation between B and C, if they are associated at all, is unclear. Deep optical observations are essential to
help clarify the situation. |
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| Keywords: | extragalactic radio sources quasars radio structure quasars linear polarization |
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