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INTERPRETATION OF THE LARGE-SCALE EMISSION FROM THE GALACTIC PLANE

Published online by Cambridge University Press:  14 August 2015

S. Drapatz
S. Drapatz*
Affiliation:
Max-Planck-Institut für Physik und Astrophysik Institut für Extraterrestrische Physik Garching, W.- Germany

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To obtain information on the large-scale structure of our Galaxy, one has to investigate the radiation in the short-wavelength and long-wavelength portion of the electromagnetic spectrum where attenuation throughout the whole galactic disk is very low: gamma-radiation on the one-hand side and infrared and radio radiation on the other side. But since most of the different modes of radiation are generated by interaction of two or more basic galactic constituents one derives only indirect information on a specific component. To come as close to a unique solution as possible the results of as many different spectral regions as possible should be combined. From this point of view it is very encouraging that infrared astronomy has been entering the field and will continue to contribute in the years to come. While gamma-radiation presents mainly information about the cosmic rays and the interstellar gas and radio astronomy about early-type stars and the interstellar gas, infrared astronomy has opened a new way to investigate a major fraction of the stellar population and the interstellar dust. The information is contained in the diffuse galactic emission, which is observed at low galactic latitudes with a field of view large enough to discriminate against point sources, i.e. the emission is averaged over typical dimensions of some 100 pc.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 96: Infrared Astronomy , 1981 , pp. 261 - 274
Copyright
Copyright © Reidel 1981 

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