Fine structure of profiles of weak diffuse interstellar bands

Free access article

Issue		A&A Volume 396, Number 3, December IV 2002


Page(s)		987 - 991
Section		Diffuse matter in space
DOI		http://dx.doi.org/10.1051/0004-6361:20021299

A&A 396, 987-991 (2002)
DOI: 10.1051/0004-6361:20021299

Fine structure of profiles of weak diffuse interstellar bands

G. Galazutdinov^{1, 2, 3}, W. Stachowska¹, F. Musaev^{1, 2, 3}, C. Moutou⁴, G. Lo Curto⁵ and J. Krelowski¹

¹ Center for Astronomy, Nicholas Copernicus University, Gagarina 11, 87-100 Torun, Poland
    e-mail: jacek@astri.uni.torun.pl; wiolka@astri.uni.torun.pl
² Special Astrophysical Observatory, Nizhnij Arkhyz 369167, Russia
    e-mail: gala@sao.ru; faig@sao.ru
³ Isaac Newton Institute of Chile, SAO Branch
⁴ Laboratorie d'Astrophysique de Marseille, Traverse du Siphon, Les trois Lucs, BP 8, 13376 Marseille Cedex 12, France
    e-mail: Claire.Moutou@oamp.fr
⁵ European Southern Observatory, Alonso De Cordova 3107, Vitacura, Santiago, Chile
    e-mail: glocurto@eso.org

(Received 17 July 2002 / Accepted 2 September 2002)

Abstract
We present a very high resolution ( $R=120\,000$ -220 000) analysis of profiles of selected diffuse interstellar bands (DIBs): 4964, 4980, 4985, 5850 Å. The 4980 Å feature is a very weak one, yet some substructures are proved to be present, as well as within the profiles of another stronger ones where this phenomenon was found several years ago. The presence of substructures inside DIB profiles supports their molecular origin.

Key words: ISM: clouds, molecules

Offprint request: J. Krelowski, jacek@astri.uni.torun.pl

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