Far-infrared observations of H II regions near the galactic center

Details Far-infrared observations of H II regions near the galactic center Far-infrared observations of H II regions near the galactic center

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..822g&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Mar. 15, 1978, p. 822-830.

Astronomy and Astrophysics

Astrophysics

71

Far Infrared Radiation, Galactic Nuclei, H Ii Regions, Milky Way Galaxy, Airborne Equipment, Astronomical Maps, Galactic Structure, Hydrogen Ions, Thermal Emission

Scientific paper

This paper presents and discusses far-infrared observations of nine H II regions within 1 deg of the galactic center, including Sgr A, Sgr B2, Sgr C, and G0.5-0.0. The far-infrared luminosity, color temperature, and optical depth of these regions and the ratio of infrared flux to radio-continuum flux lie in the range characteristic of spiral-arm H II regions. The far-infrared results are therefore consistent with the idea that the galactic-center H II regions are ionized by luminous early-type stars. Steep systematic gradients in far-infrared color temperature and optical depth are seen along the galactic plane between Sgr B2 and G0.5-0.0; the appearance of this area is similar to that of regions of star formation in the spiral arms.

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