Hydrogen recombination lines at decimetric wavelengths from the direction of the Galactic Centre
Open Access
- 1 October 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 180 (4) , 731-747
- https://doi.org/10.1093/mnras/180.4.731
Abstract
H166α lines have been measured at 21 positions within 1° of the galactic centre. H192α and 241β spectra from the direction of Sgr A are also presented. The observations usually show narrow low-velocity emission lines, probably from gas in the line of sight, and broad lines which are presumably from the central part of the Galaxy. The latter show evidence of an expanding or contracting disk of ionized gas at positive longitudes within 70 parsecs of Sgr A. Some H166α emission may be associated with the H I rotating nuclear disk.Keywords
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