Bidirectional Motion Observed in the Compact Symmetric Object 1946+708

Details Bidirectional Motion Observed in the Compact Symmetric Object 1946+708 Bidirectional Motion Observed in the Compact Symmetric Object 1946+708

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pnas...9211381t&link_type=abstract

Proceedings of the National Academy of Sciences of the United States of America, Volume 92, Issue 25, pp. 11381-11384

Computer Science

5

Scientific paper

We present the first direct measurements of bidirectional motions in an extragalactic radio jet. The radio source 1946+708 is a compact symmetric object with striking S-symmetry identified with a galaxy at a redshift of 0.101. From observations 2 years apart we have determined the velocities of four compact components in the jet, the fastest of which has an apparent velocity of 1.09 h-1c. By pairing up the components, assuming they were simultaneously ejected in opposite directions, we derive a 1σ lower limit on the Hubble constant, H_0 > 42 km.s-1.Mpc-1.

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