Detection of HI with Non-circular Velocities in the Barred Spiral NGC 1784

Details Detection of HI with Non-circular Velocities in the Barred Spiral NGC 1784 Detection of HI with Non-circular Velocities in the Barred Spiral NGC 1784

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.0706r&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #07.06; Bulletin of the American Astronomical Society, Vol. 31, p.1379

Astronomy and Astrophysics

Astronomy

Scientific paper

We present 21cm observations of NGC 1784 taken with the D configuration of the Very Large Array. NGC 1784 is an SBc(rs)I-II system. The bar in this system is bright and narrow. The arms are faint and knotty. We find a partial ring of HI on the west side of the galaxy. This ring is 80 km/s out of phase with circular mothion. We also find that the HI velocity field is decidedly non-circular. These properties may be the result of an interaction with a minor galaxy. However, no such companion is either observed or catalogued.

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