Spectral observations and physical modeling of Sharpless 121

Details Spectral observations and physical modeling of Sharpless 121 Spectral observations and physical modeling of Sharpless 121

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88.1470v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 88, Oct. 1983, p. 1470-1475.

Astronomy and Astrophysics

Astronomy

6

Astronomical Models, Astronomical Spectroscopy, Stellar Winds, Continuous Radiation, Data Reduction, H Ii Regions, Line Spectra, Molecular Clouds, Recombination Reactions

Scientific paper

The nature of the object Sharpless 121 has been the subject of considerable controversy. Four interpretations have been given of the earlier observations: H II region, planetary nebula, compact source inside a supernova remnant, and nearby object superposed over an extragalactic radio source. New observations were made of this object, using the 46-m telescope of the Algonquin Radio Observatory, to obtain the hydrogen recombination lines and continuum near 3327 MHz and near 10,522 MHz. These observations practically eliminate all but one of the earlier interpretations. The ensuing physical modeling enables the derivation of the basic physical parameters of this shell-type H II region, and an application of stellar-wind theory gives its dynamical parameters.

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