Observational test of the CH cation oscillator strengths

Details Observational test of the CH cation oscillator strengths Observational test of the CH cation oscillator strengths

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...495..189w&link_type=abstract

Astronomy and Astrophysics, Volume 495, Issue 1, 2009, pp.189-194

Astronomy and Astrophysics

Astrophysics

7

Ism: Molecules, Ism: Abundances

Scientific paper

We revise measurements of the positions and oscillator strengths using spectral features in the CH+ A-X system, and by using high-resolution, echelle spectra of 36 stars and assuming that its wavelength and oscillator strength as given in the literature for the (0, 0) transition, i.e. 4232.548 Å and 0.00545 respectively, are correct. The recommended oscillator strengths of the lines at 3957.689, 3745.308, 3579.024, and 3447.077 Å are found to be (in units of 10-5) 342, 172, 75, and 40, respectively. The estimated column densities of the CH cation toward the observed targets are also presented.

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