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Infrared Background Starlight: Observations and Galaxy Models

Published online by Cambridge University Press:  08 February 2017

G. G. Fazio ,
T. M. Dame  and
S. Kent
G. G. Fazio
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden St. Cambridge, MA 02138 USA
T. M. Dame
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden St. Cambridge, MA 02138 USA
S. Kent
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden St. Cambridge, MA 02138 USA

Abstract

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The near-infrared region of the spectrum is a particularly advantageous window for observing the distribution of old, evolved stars in the galactic disk and bulge. These stars are important because they provide an excellent tracer of the overall stellar mass distribution. At shorter wavelengths extinction is a serious problem, and at longer wavelengths the flux is dominated by dust emission. A summary of the large-scale diffuse near-infrared observations of the Galaxy is presented, as is a summary of the results obtained from these data on the structure of the galactic disk and bulge. The importance of combining CO and near-infrared maps of similar resolution to determine a three-dimensional model of galactic extinction is demonstrated. The Spacelab-2 Infrared Telescope (IRT) data are used in conjunction with a proposed galactic model to make preliminary measurements of the global scale parameters of the Galaxy.

Type
II. Galactic Background Starlight from UV to IR: Observations and Models
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 35 - 47
Copyright
Copyright © Kluwer 1990 

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