Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..nes.b1001c&link_type=abstract
American Physical Society, 2002 Joint Spring Meeting of the New England , abstract #B1.001
Astronomy and Astrophysics
Astronomy
Scientific paper
Quasars are brilliant and violent nuclei of distant galaxies, whose energy output exceeds that of entire normal galaxies by factors of 10-100. A small fraction of the most powerful quasars are observed to eject well-collimated jets of relativistic plasma which extend out to distances of a few million light years or more. These jets are believed to be powered by the accretion of matter onto a supermassive black hole of 10^8 to 10^9 solar masses in the nucleus. For over two decades, the Brandeis Radio Astronomy Group has been studying the quasar jet phenomenon from radio to X-ray wavelengths, and with resolution up to 100 times better than that achieved by the Hubble Space Telescope. In particular, we have focused on studies of the jet magnetic fields through mapping the polarized emission, and on following motions close to the black hole where structures are found to be moving at apparent velocities that exceed the speed of light. In this presentation, we highlight our group's most current research activities.
Cheung Teddy
Roberts David H.
Wardle John F. C.
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