NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-19 T05:34:24 PDT
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For refcode 1995PASJ...47..725I:
Retrieve 96 NED objects in this reference.
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NED Abstract

Copyright by Astronomical Society of Japan. 1995PASJ...47..725I Search for High Rotation Measures in Extragalactic Radio Sources I. Multi-Channel Observations at 10 Ghz Makoto INOUE Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano, 384-13 Hiroto TABARA and Tatsuji KATO Faculty of Education, Utsunomiya University, Mine, Utsunomiya, Tochigi 321 and Ko Aizu Katahira 3-24-3, Asao-ku, Kawasaki, Kanagawa 215 (Received 1995 June 2; accepted 1995 October 26) Abstract Multi-channel polarimetry has been performed to detect high rotation measure (RM) at 3 cm using the Nobeyama 45-m telescope. The high RM candidates of 96 radio sources were selected to be observed, and RMs of 35 sources were derived from the observations. Since the four channels are set contiguously from 2.84 cm to 3.31 cm, (AM] can be derived uniquely up to 15000 rad m^-2^ by this polarimeter. We found that there exist sources with RM of several thousands rad m^-2^. In fact, 5 sources have |RM| > 1000 rad m^-2^. On the other hand, all sources observed are well within this system limits, and therefore we suggest the observed upper limit of |RM| is around 5000 rad m^-2^ extragalactic radio sources, even taken into account the redshift of sources. Key words: Galaxies: active - Galaxies: magnetic fields - Polarization - Radio sources
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