Journal Article

CN column densities and excitation temperatures

K. Słyk, A. V. Bondar, G. A. Galazutdinov and J. Krełowski

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 390, issue 4, pages 1733-1750
Published in print November 2008 | ISSN: 0035-8711
Published online October 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13871.x
CN column densities and excitation temperatures

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We analyse abundances and rotational temperatures of the interstellar CN molecule. We have calculated the column densities and excitation temperatures of the molecule along 73 lines of sight basing on our original measurements of the B2Σ+X2Σ+ (0,0) vibrational band recorded in high signal-to-noise ratio spectra and also for 88 directions based on measurements already available in literature. We compare the column densities obtained from different bands of CN molecule available to ground-based instruments. The obtained excitation temperatures in the analysed directions show always an excess over the cosmic microwave background radiation (CMBR) temperature.

Keywords: ISM: clouds; ISM: molecules

Journal Article.  9852 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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