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First Results from a Study of DIBs with Thousands of High-Quality Massive-Star Spectra

Published online by Cambridge University Press:  21 February 2014

J. Maíz Apellániz ,
A. Sota ,
R. H. Barbá ,
N. I. Morrell ,
A. Pellerin ,
E. J. Alfaro  and
S. Simón-Díaz
J. Maíz Apellániz
Affiliation:
Instituto de Astrofísica de Andalucía-CSIC, Spain email: [email protected]
A. Sota
Affiliation:
Instituto de Astrofísica de Andalucía-CSIC, Spain email: [email protected]
R. H. Barbá
Affiliation:
Universidad de La Serena, Chile
N. I. Morrell
Affiliation:
Las Campanas Observatory, Chile
A. Pellerin
Affiliation:
Mount Allison University, Canada
E. J. Alfaro
Affiliation:
Instituto de Astrofísica de Andalucía-CSIC, Spain email: [email protected]
S. Simón-Díaz
Affiliation:
Instituto de Astrofísica de Canarias, Spain
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Abstract

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We are using five different surveys to compile the largest sample of diffuse interstellar band (DIB) measurements ever collected. GOSSS is obtaining intermediate-resolution blue-violet spectroscopy of ~2500 OB stars, of which 60% have already been observed and processed. The other four surveys have already collected multi-epoch high-resolution optical spectroscopy of 700 OB stars with different telescopes, including the 9 m Hobby-Eberly Telescope in McDonald Observatory. Some of our stars are highly-extinguished targets for which no good-quality optical spectra have ever been published. For all of the targets in our sample we have obtained accurate spectral types, measured non-DIB ISM lines, and compiled information from the literature to calculate the extinction. Here we present the first results of the project, the properties of twenty DIBs in the 4100-5500 Å range. We clearly detect a couple of previously elusive DIBs at 4170 Å and 4591 Å; the latter could have coronene and ovalene cations as carriers.

Keywords

line: identificationline: profilessurveysstars: early-typeISM: lines and bands
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 117 - 120
Copyright
Copyright © International Astronomical Union 2014 

References

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