Infrared and radio recombination line observations of K3-50

Details Infrared and radio recombination line observations of K3-50 Infrared and radio recombination line observations of K3-50

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...207..132r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 207, no. 1, Dec. 1988, p. 132-144. Research supported by ASTRON.

Astronomy and Astrophysics

Astrophysics

26

H Ii Regions, Infrared Spectra, Interstellar Matter, Radio Spectra, Absorption Spectra, Continuous Spectra, Galactic Radiation, Interstellar Extinction, Thermodynamic Equilibrium

Scientific paper

The galactic H II region K3-50 has been mapped in Brα infrared and 110α radio recombination lines with a resolution of about 5arcsec. Pressure broadening is found to be important in the compact components. The observed broad H110α lines imply true electron densities >105cm-3. Narrow line H110α(H I) emission from the partially ionized medium is observed towards K3-50 A (FWHM ≡ 4 km s-1) and Cl (ON3, FWHM ≡ 14 km s-1). The visual extinction Αv due to foreground material has been determined by comparing the radio continuum and Brα intensity. An extinction of Αv ≥ 190 mag is found towards the core of component Cl. In the direction of component Cl the Brα, 4 μm continuum and radio data suggest the presence of a disk of molecular material observed edge-on.

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