Star formation in the inner Galaxy from near and far infrared observations

Details Star formation in the inner Galaxy from near and far infrared observations Star formation in the inner Galaxy from near and far infrared observations

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....84..220s&link_type=abstract

Astronomy and Astrophysics, vol. 84, no. 1-2, Apr. 1980, p. 220-227.

Astronomy and Astrophysics

Astronomy

19

Galactic Evolution, Infrared Astronomy, Milky Way Galaxy, Star Formation, B Stars, Far Infrared Radiation, Near Infrared Radiation, O Stars, Red Giant Stars, Star Formation Rate, Stellar Luminosity

Scientific paper

Available near- and far-infrared surveys of the galactic plane are compared and analysed to deduce the emission of the Galaxy as a function of the galactocentric distance. An excess of stars in both evolution phases, mainly located in a 5-6 kpc 'ring', is required to account for the observations. Based on usual star evolution tracks, it is shown that the red giant stars are more numerous (by a factor 5 or so) that can be explained by the present OB star formation rate. Possible interpretations of this discrepancy are either a steeper initial mass function in the inner galaxy, or, a star formation rate having decreased with time by a factor 5 to 10 in the last 1 billion yr.

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