VLA synthesis of H I absorption toward SGR A

Details VLA synthesis of H I absorption toward SGR A VLA synthesis of H I absorption toward SGR A

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...126..341l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 2, Oct. 1983, p. 341-351.

Astronomy and Astrophysics

Astronomy

57

Galactic Nuclei, Hydrogen Clouds, Interstellar Gas, Molecular Clouds, Radiation Absorption, Radio Astronomy, Angular Resolution, Astronomical Maps, Carbon Monoxide, Kinematics, Spectral Resolution

Scientific paper

Synthesis maps of the H I absorption in Sgr A using the VLA at 12 arcsec angular resolution in the velocity range of -300 km/s to 250 km/s with 6 km/s spectral resolution are presented. New (C-12)O emission maps taken over a 5 arcmin x 5 arcmin region around Sgr A with 45 arcsec spacings of the 66 arcsec beam of the 36-foot telescope on Kitt Peak are presented. A good correspondence between the H I and CO kinematics and the morphology is shown, implying that the H I absorption arises in most cases in molecular clouds, that the observable absorption patterns are manifestations of column-density variations, and that the distribution of the CO gas toward Sgr A is very asymmetrical, most lying closer to the sun than Sgr A itself.

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