Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.171..659c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 171, June 1975, p. 659-696. Research supported by the Association of Co
Astronomy and Astrophysics
Astronomy
40
Galactic Nuclei, Galactic Radiation, H Lines, Hydrogen Clouds, Milky Way Galaxy, Radio Galaxies, Microwave Emission, Radio Astronomy, Radio Telescopes, Velocity Distribution
Scientific paper
A survey of the 21-cm neutral hydrogen line is described which was conducted at Jodrell Bank to study known emission features out of the galactic plane at high sensitivity, to search for gas at even greater velocities, and to seek further evidence for the distance and motions of the material relative to the center. The data are presented in the form of contour maps of antenna temperature as a function of galactic latitude and velocity and of galactic longitude and velocity. Six new high-velocity emission features are detected, all lying out of the galactic plane, and H I column densities are calculated for all the surveyed features. Nine previously studied features in the galactic disk are described in detail together with six previously studied and six newly detected features outside the galactic plane. From the fair degree of symmetry in the distribution of the high velocity gas as a whole about the nucleus, it is suggested that the features are associated with the central galactic region, and the extremely broad profile and geometric configuration of one of the new features suggests expulsion from the nuclear region.
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