Issue |
A&A
Volume 377, Number 3, October III 2001
|
|
---|---|---|
Page(s) | 1063 - 1067 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20011126 | |
Published online | 15 October 2001 |
The problem of C7^- as source of diffuse interstellar bands revisited
1
Special Astrophysical Observatory, Nizhnij Arkhyz 369167, Russia e-mail: faig@sao.ru
2
Center for Astronomy, Nicholas Copernicus University, Gagarina 11, 87-100 Toruń, Poland e-mail: nirski@astri.uni.torun.pl, jacek@astri.uni.torun.pl
Corresponding author: G. Galazutdinov gala@sao.ru
Received:
22
March
2001
Accepted:
8
August
2001
We used spectra of several bright, reddened stars, most
of them likely to be obscured by individual interstellar clouds,
to examine the proposition that may carry several diffuse
interstellar bands (DIBs) (Tulej et al. 1998). To search for the
broad features of the
B
X system we used low
resolution, very high
spectra, but even in heavily reddened
objects the predicted bands remain undetectable. High resolution
(
) spectra prove that the diffuse bands, found in close
vicinity of narrow lines belonging to the A
X system,
show variable strength ratios from object to object which proves
that they are not of the same origin. The paper brings thus
evidence that the
molecule does not cause any of the
detected DIBs.
Key words: ISM: clouds / ISM: molecules
© ESO, 2001
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