First results from a study of DIBs with thousands of high-quality massive-star spectra

DOI: 
10.1017/S1743921313015706
Publication date: 
01/02/2014
Main author: 
Apellániz J.M.
IAA authors: 
Apellániz, J.M.;Sota, A.;Alfaro, E.J.
Authors: 
Apellániz J.M., Sota A., Barbá R.H., Morrell N.I., Pellerin A., Alfaro E.J., Simón-Díaz S.
Journal: 
Proceedings of the International Astronomical Union
Publication type: 
Article
Volume: 
9
Pages: 
117-120
Number: 
Abstract: 
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. Copyright © International Astronomical Union 2014.
Database: 
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2014IAUS..297..117M/abstract
ADS Bibcode: 
2014IAUS..297..117M
Keywords: 
ISM: lines and bands; line: identification; line: profiles; stars: early-type; surveys