Positional coincidence between an H2O maser and a plasma torus in NGC 1052

Details Positional coincidence between an H2O maser and a plasma torus in NGC 1052 Positional coincidence between an H2O maser and a plasma torus in NGC 1052

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..242..406s&link_type=abstract

Astrophysical Masers and their Environments, Proceedings of the International Astronomical Union, IAU Symposium, Volume 242, p.

Astronomy and Astrophysics

Astrophysics

Galaxies: Active, Galaxies: Individual(Ngc 1052), Galaxies: H2O Maser

Scientific paper

We present VLBA observation towards the nucleus of a nearby radio galaxy NGC 1052. In NGC 1052, two-sided jet structure and a dense plasma circumnuclear torus with a radius of 0.7 pc have been found around the central mass. It emits a H2O megamaser, which is redshifted with respect to the systemic velocity of the galaxy (1491 kms-1) with a large velocity width of 100 kms-1 (FWHM). The maser gas is found at the inner jet components of both the approaching and receding jets. The maser gas is positionally coincident with a plasma torus. The maser gas in NGC 1052 could be explained as a circumnuclear torus or disk, as found for the nucleus of NGC 4258.

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