First Results from a Study of DIBs with Thousands of High-Quality Massive-Star Spectra. Issue Volume 9:Issue S297(2013) (21st February 2014)

• Record Type: Journal Article
• Authors: Apellániz, J. Maíz; Sota, A.; Barbá, R. H.; Morrell, N. I.; Pellerin, A.; Alfaro, E. J.; Simón-Díaz, S.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S297(2013)
• Page Start: 117
• Page End: 120
• Publication Date: 2014-02-21
• Subjects: line: identification, -- line: profiles, -- surveys, -- stars: early-type, -- ISM: lines and bands; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313015706
• Languages: English
• ISSNs: 1743-9213

Abstract

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.