Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.386.2003g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 386, Issue 4, pp. 2003-2008.
Astronomy and Astrophysics
Astronomy
4
Ism: Lines And Bands
Scientific paper
High-resolution echelle spectra of five reddened OB stars are used to analyse details of the profiles of diffuse interstellar bands (DIBs) at 4726, 4735, 5418, 5850, 6196, 6376, 6379 Å together with the well studied 5797, 5780 and 6614 ones. All targets do not show Doppler splitting in the interstellar CH 4300 band with the applied resolving power R = 115000. The profiles of DIBs differ from object to object except 5418 which looks invariant in our sample: the DIB is a good candidate for further study of possible isotopic effect. We also found that the width of bands at 5797 and 6614 Å probably is more sensitive to the temperature (and density) effects than that of other DIBs in the sample, though almost all diffuse bands are narrowest in most ζ-type object (HD179406) of the sample. On the other hand, it can be just peculiar effect as in a case of unusual line of sight HD147889 which demonstrates very broad 5780 and 6614 Å diffuse bands what hardly can be explained by temperature effects.
Based on data collected at the European Southern Observatory (ESO) 3.6-m telescope and the HARPS spectrograph (R = 115000).
E-mail: gala@kasi.re.kr (GAG); glocurto@eso.org (GLC); jacek@astri.uni.torun.pl (JK)
Galazutdinov G. A.
Krełowski Jacek
Lo Curto Gaspare
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