SIMBAD references

2000ApJ...531..219M - Astrophys. J., 531, 219-231 (2000/March-1)

Discovery of a nuclear gas bar feeding the active nucleus in Circinus.

MAIOLINO R., ALONSO-HERRERO A., ANDERS S., QUILLEN A., RIEKE M.J., RIEKE G.H. and TACCONI-GARMAN L.E.

Abstract (from CDS):

We report the discovery of gas inflow motions toward the active nucleus of the Circinus galaxy caused by the nonaxisymmetric potential of a nuclear gas bar. Evidence for dust associated with the bar comes from the HST/NICMOS H-K color map, whereas the streaming motions along the gas bar are seen in the velocity field of the H2 S(1) (1-0) emission line. The gas bar is about 100 pc long with a visual extinction in excess of 10 mag. Indication for the gaseous nature of this bar comes from the lack of a stellar counterpart even in the K band, where the extinction is greatly reduced.

We also use the NICMOS emission-line images (Paα, [Si VI], and [Fe II]) to study the innermost region of the ionization cones and the nuclear star-forming activity. We discuss the possible relationship of these components with the gaseous bar.


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Journal keyword(s): Galaxies: Active - galaxies: individual (Circinus) - Galaxies: Kinematics and Dynamics - Galaxies: Nuclei - Galaxies: Seyfert - Infrared: Galaxies

Simbad objects: 1

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