CO in NGC 1530, aperture synthesis of a barred spiral

Details CO in NGC 1530, aperture synthesis of a barred spiral CO in NGC 1530, aperture synthesis of a barred spiral

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995yera.conf...26r&link_type=abstract

The XXVIIth Young European Radio Astronomers Conference, ed. D.A. Green and W. Steffen, in association with Cambridge University

Astronomy and Astrophysics

Astronomy

Scientific paper

NGC 1530 is one of the largest barred spiral galaxies in the northern sky, with bright CO emission. It offers a chance to understand the basics of the kinematics of barred spirals. To trace molecular gas, we observed the CO J = 1 -> 0 line, with the IRAM Interferometer. After calibration of the data, we obtained mosaic images, with a synthesized beam of 4 arcsec, covering the entire bar, i.e. about 1.5 arcmin, in velocity channels 20 km/s wide, with a good signal to noise ratio. These maps agree with predictions of barred potential simulations, especially the fact that the strongest emission arises from twin peaks oriented perpendicular to the large scale stellar bar. This phenomenon can be explained by the crowding of gas streamlines near the inner Lindblad resonance.

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