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Infrared observations of the nuclear region

Published online by Cambridge University Press:  14 August 2015

E. R. Wollman
E. R. Wollman*
Affiliation:
Kitt Peak National Observatory1)

Abstract

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Infrared observations have provided considerable information about the structure and energetics of the galactic center. The stellar bulge dominates the mass and luminosity of the nuclear region. The luminosity of the bulge is strongly peaked toward the center, even within the central parsec. Dust in the nuclear disk absorbs the power output of the central portion of the bulge and reemits it in the far infrared. Near the center, molecular clouds move in a plane apparently tilted toward the Sun. Within the central few parsecs, or core, the inclination may be as large as 45°. The total power output of the core is about twice that of the bulge population alone. The source of excess luminosity is uncertain, but evidence points to ongoing star formation associated with the Sgr A molecular complex.

Type
VI. THE GALACTIC NUCLEUS
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 367 - 375
Copyright
Copyright © Reidel 1979 

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