Other
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..556r&link_type=abstract
Astrophysical Journal, Part 1, vol. 220, Mar. 1, 1978, p. 556-567. NSF-supported research;
Other
64
Far Infrared Radiation, Galactic Nuclei, Star Distribution, Stellar Evolution, Stellar Luminosity, Astronomical Maps, Cosmic Dust, Early Stars, Galactic Clusters, Ground Stations
Scientific paper
Ground-based and airborne infrared observations of the Galactic center near Sgr A are presented. The principal results include: (1) A map at 56 microns (28-arcsec beam FWHM) which shows a ridge of emission in which are immersed two peaks, one at the infrared cluster and another 1 arcmin to the southwest. Early-type stars may produce much of the luminosity seen as thermally reradiated far-infrared flux. (2) A map of the infrared cluster at 34 microns (8.5-arcsec beam) which indicates that the distribution at this wavelength is similar to that at 21 microns, with most of the compact sources which emit at wavelengths shorter than 20 microns emitting relatively weakly at 34 microns. (3) A map at 10 microns which combines observations obtained with 1.5-, 2.3-, 3-, 5.5-, and 20-arcsec beams and shows for the first time the extended 10-micron structure, including the southwestern component, in relation to the cluster of compact sources. Most of the compact 10-micron sources have the structure and spectra to be expected if a luminous object is embedded in a tenuous dust cloud.
Harper Doyal A.
Rieke George H.
Telesco Charles M.
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