Interstellar molecular lines in the direction of the young star TY CrA

Details Interstellar molecular lines in the direction of the young star TY CrA Interstellar molecular lines in the direction of the young star TY CrA

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97.1099c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, April 1989, p. 1099-1109.

Astronomy and Astrophysics

Astronomy

32

Absorption Spectra, Early Stars, Interstellar Matter, Line Spectra, Molecular Spectra, Echelle Gratings, H Ii Regions, Interstellar Extinction, Photochemical Reactions

Scientific paper

Echelle data for the CN, CH, and CH(+) lines along the line of sight to TY CrA, a young star in a very young star forming region, are discussed. The molecular abundances of CN and CH are low in comparison to those of HD 29647. The results suggest that CH(+) is formed in a weak shock that may be associated with the local cloud collapse. The large abundances of CH(+) and CH imply a shock with a velocity of about 10 km/s (seen at an angle from the normal to the shock front of about 70 deg) and a radiation-field-enhancement factor of about 3-5.

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