Radio continuum observations of the blister type H II region in MON R2

Details Radio continuum observations of the blister type H II region in MON R2 Radio continuum observations of the blister type H II region in MON R2

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152..387m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 2, Nov. 1985, p. 387-392.

Astronomy and Astrophysics

Astronomy

44

H Ii Regions, Infrared Astronomy, Interstellar Matter, Molecular Clouds, Radio Astronomy, Reflection Nebulae, Astronomical Models, Evolution (Development), Gas Ionization, Infrared Spectra, Morphology, Radio Observation

Scientific paper

Radio observations at 1.3 and 6 cm wavelength with resolutions up to 1arcsec of the H II region in the Mon R2 molecular cloud are presented. The radio structure is very similar to that indicated by the 10 and 20 μm wavelength maps of the region obtained by Beckwith et al. (1976). The peak of the radio emission is located on the bright edge of an almost circular source, approximately 27arcsec in diameter. The position of the ionizing star (obscured at visible wavelengths) is derived from a comparison of the radio and IR maps, and is found to be displaced from the radio peak. The general morphology suggests an interpretation in terms of a "blister" type structure of the H II region with the 27arcsec diameter component still partially within the molecular cloud. Comparison of the observed structure with the predicted evolutionary patterns and expansion time scales of blisters indicates an advanced stage of the evolution.

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