Neutral hydrogen in the vicinity of the radio source Sagittarius B2

Details Neutral hydrogen in the vicinity of the radio source Sagittarius B2 Neutral hydrogen in the vicinity of the radio source Sagittarius B2

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pazh....6..759a&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 6, Nov.-Dec. 1980, p. 759-762.) Soviet Astronomy Letters, vol. 6, Nov.-Dec. 1980, p. 40

Astronomy and Astrophysics

Astronomy

Absorption Spectra, Hydrogen Clouds, Interstellar Gas, Milky Way Galaxy, Neutral Gases, Radio Sources (Astronomy), Cosmic Dust, Gas Flow, Mass Distribution, Radial Velocity

Scientific paper

The H I cloud around the Sgr B2 gas-dust complex has been observed in a telescope at 21-cm wavelength. At the altitude of Sgr B2, the beamwidth measured 2.6 x 55 arcmin, the resolution in the radial velocity was 6.3 km/sec, and drift curves of the source transitting the antenna beam were recorded at 3.1 km/sec intervals. It is found that the cloud measures 40 pc across; its HI 1 mass is approximately 1500 solar masses, and its kinetic temperature is less than 20 K. The rotational velocity at the edge of the cloud is 20 km/sec. It is also found that the cloud has no radial motion of 5 km/sec or more and is most likely to have the shape of a shell whose thickness is about half its radius.

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