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The 1.4-2.7 micron spectrum of the point source at the galactic centerThe spectrum of the 2-micron point source at the galactic center is presented over the range from 1.4 to 2.7 microns. The two-level-transition CO band heads are seen near 2.3 microns, confirming that the radiation from this source is due to a cool supergiant star. The heliocentric radial velocity is found to be - 173 (+ or -90) km/s and is consistent with the star being in orbit about a dense galactic nucleus. No evidence is found for Brackett-gamma emission, and no interstellar absorption features are seen. Upper limits for the column densities of interstellar H2, CH4, CO, and NH3 are derived.
Document ID
19770028843
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Treffers, R. R. (Arizona Univ. Tucson, AZ, United States)
Fink, U. (Arizona Univ. Tucson, AZ, United States)
Larson, H. P. (Arizona Univ. Tucson, AZ, United States)
Gautier, T. N., III (Arizona, University Tucson, Ariz., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1976
Publication Information
Publication: Astrophysical Journal
Volume: 209
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSG-7070
Distribution Limits
Public
Copyright
Other