Infrared mapping of the Galactic plane. IV - The Galactic center

Details Infrared mapping of the Galactic plane. IV - The Galactic center Infrared mapping of the Galactic plane. IV - The Galactic center

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1812l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Sept. 1985, p. 1812-1819.

Astronomy and Astrophysics

Astronomy

18

Galactic Nuclei, Infrared Astronomy, Milky Way Galaxy, Astronomical Maps, Brightness, Emission Spectra, H Ii Regions

Scientific paper

Mid-infrared observations of the galactic center region were obtained at 4, 11, 20, and 27 microns on three rocket-borne experiments. The diffuse emission around the galactic center can be separated into three components: (1) a foreground emission from the galactic disk and the 4-5 kpc ring, (2) a spheroidal component surrounding the center, due to unresolved stellar sources of T greater than 2000 K, and (3) a diffuse elliptical component immediately surrounding the galactic center. The color temperatures of (1) and (3) are consistent with an interpretation of a two-component source of emission from warm dust (about 400 K) characteristic of circumstellar dust shells and cooler dust from extended low-density H II regions. Current models for the infrared emission from interstellar grains cannot reproduce the present spectral distribution in the mid-infrared.

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