Volume 479, Number 1, February III 2008
|Page(s)||149 - 154|
|Section||Interstellar and circumstellar matter|
|Published online||12 December 2007|
Relation between CH cation and neutral/molecular hydrogen
Department of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072 Bydgoszcz, Poland e-mail: firstname.lastname@example.org
2 Korea Astronomy and Space Science Institute, Optical Astronomy Division, 61-1 Hwaam-Dong, Yuseong-Gu, Daejeon 305-348, Korea e-mail: email@example.com
3 Special astrophysical observatory, Nizhnij Arkhyz 369167, Russia e-mail: firstname.lastname@example.org
4 Center for Astronomy, Nicolaus Copernicus University, Gagarina 11, Pl-87-100 Toruń, Poland e-mail: email@example.com
Accepted: 28 November 2007
Observations of interstellar absorption bands of CH+ molecule at 3957 and 4232 Å were applied to determine column densities toward 53 stars. The targets were selected because the atomic and molecular hydrogen column densities are published. The data on CH+ were acquired using four echelle spectrographs situated in both the Northern and Southern hemispheres. Spatial relations between column densities of CH+ and those of molecular, atomic and total hydrogen show large scatter, suggesting there is no relation between abundances of methylidyne cation and hydrogen in any form.
Key words: ISM: molecules / ISM: abundances
© ESO, 2008
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