The H II region - Molecular cloud complex SH 2-269: an optical and millimeter wavelength study

Details The H II region - Molecular cloud complex SH 2-269: an optical and millimeter wavelength study The H II region - Molecular cloud complex SH 2-269: an optical and millimeter wavelength study

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...113..118h&link_type=abstract

Astronomy and Astrophysics, vol. 113, no. 1, Sept. 1982, p. 118-128.

Astronomy and Astrophysics

Astrophysics

17

H Ii Regions, Interstellar Gas, Molecular Clouds, Stellar Evolution, Cosmic Dust, Electron Density Profiles, Hydrogen Ions, Infrared Radiation, Interstellar Masers, Millimeter Waves, Radial Velocity, Visible Spectrum

Scientific paper

The results of a study of the galactic H II region Sh 2-269 and its associated molecular cloud, which is a region of ongoing star formation, is presented. Several narrow-band photographs and spectra near H(alpha) were obtained and analyzed quantitatively, and the molecular cloud was observed in several molecular lines and mapped in (C-13)O (J equals 1 to 0). A high velocity ionized gas that is associated with an H2O/OH/IR source is ejected from the nebula with a blueshift velocity of about 200 km/sec with respect to the main optical lines of the H II region. The action of a windy star embedded in the molecular cloud probably causes this ejection. Dust is found to be concentrated mainly in a dark band dividing the nebula, as well as toward the most excited zones of the nebula. In addition, the combined observational data have been used to propose a model for the H II region Sh 2-269.

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