VLT Spectroscopy of Blue Supergiants in IC 1613
Authors:
- Fabio BresolinFBFabio Bresolin
- Miguel A. UrbanejaMUMiguel A. Urbaneja
- Wolfgang GierenWGWolfgang Gieren
- Grzegorz PietrzyńskiGPGrzegorz Pietrzyński
- Rolf‐Peter KudritzkiRKRolf‐Peter Kudritzki
- 20 December 2007
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 671 (2) , 2028-2039
Abstract
We present multi-object spectroscopy of young, massive stars in the Local Group galaxy IC 1613. We provide the spectral classification and a detailed spectral catalog for 54 OBA stars in this galaxy. The majority of the photometrically selected sample is composed of B- and A-type supergiants. The remaining stars include early O-type dwarfs and the only Wolf-Rayet star known in this galaxy. Among the early B stars we have serendipitously uncovered 6 Be stars, the largest spectroscopically confirmed sample of this class of objects beyond the Magellanic Clouds. We measure chemical abundances for 9 early-B supergiants, and find a mean oxygen abundance of 12+log(O/H)=7.90 +/- 0.08. This value is consistent with the result we obtain for two HII regions in which we detect the temperature-sensitive [OIII]4363 auroral line.Comment: 17 pages, accepted for publication in the Astrophysical JournaKeywords
All Related Versions
This publication has 55 references indexed in Scilit:
- The ARAUCARIA Project: VLT‐FORS Spectroscopy of Blue Supergiants in NGC 3109—Classifications, First Abundances, and KinematicsThe Astrophysical Journal, 2007
- Effects of metallicity, star-formation conditions, and evolution in B and Be starsAstronomy & Astrophysics, 2006
- The Araucaria Project: VLT Spectra of Blue Supergiants in WLM— Classification and First AbundancesThe Astrophysical Journal, 2006
- On the α‐Element Abundance Gradients in the Disk of the Sculptor Spiral Galaxy NGC 300The Astrophysical Journal, 2005
- Understanding B-type supergiants in the low metallicity environment of the SMCAstronomy & Astrophysics, 2004
- Quantitative Spectral Analysis of Early B-Type Supergiants in the Sculptor Galaxy NGC 300The Astrophysical Journal, 2003
- Detailed kinematic study of the ionized and neutral gas in the complex of star formation in the galaxy IC 1613Astronomy Letters, 2003
- Spectroscopy of Blue Supergiants in the Spiral Galaxy NGC 300The Astrophysical Journal, 2002
- Observations of stellar objects at a shell boundary in the star-forming complex in the galaxy IC 1613Astronomy Reports, 2002
- The Distance of the Local-Group Galaxy IC 1613 Obtained from Baade's Work on its Stellar ContentThe Astrophysical Journal, 1971