Volume 498, Number 3, May II 2009
|Page(s)||785 - 791|
|Section||Interstellar and circumstellar matter|
|Published online||25 March 2009|
Excitation temperature of and broadening of the 6196 Å diffuse interstellar band*
Centre for Astronomy, Nicolaus Copernicus University, Gagarina 11, 87-100 Toruń, Poland e-mail: [kazmierczak;jacek]@astri.uni.torun.pl
2 Institute of Theoretical Physics and Astrophysics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland e-mail: email@example.com
3 Nicolaus Copernicus Astronomical Center, Rabiańska 8, 87-100 Toruń, Poland e-mail: firstname.lastname@example.org
4 Korea Astronomy and Space Science Institute, ICAP, 61-1, Hwaam-dong, Yuseong-gu, Daejeon, 305-348, Republic of Korea e-mail: email@example.com
5 International Centre for Astronomical and Medico-Ecological Research, Terskol, Russia e-mail: firstname.lastname@example.org
Accepted: 22 February 2009
This paper presents a finding of the correlation between the width of a strong diffuse interstellar band at 6196 Å and the excitation temperature of C2 based on high resolution and high signal-to-noise ratio spectra. The excitation temperature was determined from absorption lines of the Phillips and Mulliken systems. The width and shape of the narrow 6196 Å DIB profile apparently depend on the C2 temperature, being broader for higher values.
Key words: ISM: molecules / ISM: general
© ESO, 2009
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