Other
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..622f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, Feb. 1990, p. 622-637.
Other
74
Astronomical Catalogs, Fabry-Perot Spectrometers, H Alpha Line, H Ii Regions, Supernova Remnants, Angular Velocity, Milky Way Galaxy, Northern Hemisphere
Scientific paper
The radial velocity and linewidth of H-alpha emission from 284 objects listed in Galactic H II region catalogs were observed using a Fabry-Perot spectrometer. A few of these objects are supernova remnants or planetary nebula. The rest of this sample encompasses most of the H II regions that are visible optically from the Northern Hemisphere. These observations are compared to previous H-alpha observations as well as to radio recombination line and CO observations. The average radial-velocity difference V(CO) - V(H-alpha) is 0.50 + or - 0.48 km/s and the (1-sigma) dispersion is 6.44 km/s. The implications of these values are discussed in terms of a very simple kinematic and extinction H II region model. Total H-alpha luminosities for the sample are estimated, and the Galactic H II region luminosity function is compared to that recently found for other galaxies.
Dahl Geoff P.
Fich Michel
Treffers Richard R.
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