Positional Coincidence between Water Masers and a Plasma Torus in NGC 1052

Details Positional Coincidence between Water Masers and a Plasma Torus in NGC 1052 Positional Coincidence between Water Masers and a Plasma Torus in NGC 1052

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..340..119s&link_type=abstract

Future Directions in High Resolution Astronomy: The 10th Anniversary of the VLBA, ASP Conference Proceedings, Vol. 340. Edited

Astronomy and Astrophysics

Astronomy

Scientific paper

We present result of the VLBA observation toward a radio galaxy NGC 1052. In NGC 1052, double-sided jet structure and a dense plasma circumnuclear torus with a radius of 0.7 pc have been found around the central mass. From our observations, the jet structure in 2000 is similar to that in 1998, and the two jet structures in 1998 and 2000 support the sub-luminal motion with apparent velocity of 0.26c. The maser gas is positionally coincident with a plasma torus, and the position of the maser gas relative to the nucleus is stable from 1995 to 2000. The maser gas in NGC 1052 could be explained as a nuclear circumnuclear torus or disk like the situation found in the nucleus of NGC 4258.

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