A multiline, multiresolution VLA study of the ultracompact H II region G29.96-0.02

Details A multiline, multiresolution VLA study of the ultracompact H II region G29.96-0.02 A multiline, multiresolution VLA study of the ultracompact H II region G29.96-0.02

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..697a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 2, p. 697-704

Astronomy and Astrophysics

Astrophysics

22

H Ii Regions, Interstellar Matter, Line Spectra, Molecular Clouds, Morphology, Radio Spectra, Shock Waves, Spatial Resolution, Astronomical Models, Ionization, Nebulae, Stellar Winds, Very Large Array (Vla)

Scientific paper

A non-local thermodynamic equilibrium (non-LTE) analysis is presented for high spatial resolution observations of H 110 alpha, H 66 alpha, and H 42 alpha toward the cometary ultracompact (UC) H II region G29.96-0.02. We find a mean Taue approximately 6500 K and local ne approximately 5 x 104/cu cm in the leading arc and ne approximately 2 x 104/cu cm in the tail. Impact broadening is significant in H 110 alpha, implied by a reduction in the peak line amplitude by as much as 50% in the leading arc. The morphology of the line emission and the line profiles are consistent with a bow shock.

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