Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.186..453c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 186, Feb. 1979, p. 453-472. Research supported by the Association of Co
Astronomy and Astrophysics
Astronomy
13
Galactic Nuclei, Hydrogen Clouds, Milky Way Galaxy, Neutral Gases, Astronomical Maps, Galactic Structure, H Lines, Radio Astronomy, Symmetry
Scientific paper
Results are presented for a survey of the innermost region of the Galaxy, within 1 deg of latitude and longitude of the galactic center, in the 21-cm line of neutral hydrogen with an angular resolution of 13 x 13 arcmin and a velocity resolution of 7.3 km/s. Latitude-velocity maps for various longitudes and longitude-velocity maps for various latitudes are provided, and the distribution and kinematics of the neutral gas in the galactic nucleus are studied. The major H I features appearing in the longitude-velocity maps are discussed, along with the emission from the nuclear disk, feature XVI, and the molecular ring. The previously detected tilt of the nuclear disk is traced to within about 200 pc of the nucleus. The presence of both circular and noncircular motions in the nucleus is confirmed, and the possibility of posing a nonviolent alternative to the explosion hypothesis on the origin of the noncircular motion is considered.
Cohen Richard J.
Davies Rhodri D.
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