Infrared lines as probes of galactic structure

Details Infrared lines as probes of galactic structure Infrared lines as probes of galactic structure

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..403h&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 403-414 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

2

Abundance, Galactic Mass, Galactic Structure, H Ii Regions, Infrared Spectra, Line Spectra, Forbidden Transitions, Infrared Astronomy, Mass Distribution, Milky Way Galaxy, Radio Sources (Astronomy)

Scientific paper

The status of infrared, optical and radio observations of H II regions is discussed. These measurements indicate changes in the abundances of O, N, and Ne relative to hydrogen by factors of three or more over the range from 14 kpc to 5 kpc in galactocentric radius. Particular attention is given to the infrared measurements of abundances, which provide a direct means to probe the structure of our galaxy. The implications of the abundance gradient results for galactic nucleosynthesis are discussed. The perspective of infrared measurements in such studies, and the future directions of infrared spectroscopy for exploring galactic structure, are investigated.

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