DOI:
10.1017/S1743921313015706
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
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.
URL:
https://ui.adsabs.harvard.edu/#abs/2014IAUS..297..117M/abstract
Keywords:
ISM: lines and bands; line: identification; line: profiles; stars: early-type; surveys