Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10

Details Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10 Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10

2003-02-24

arxiv.org/abs/astro-ph/0302475v2

Astron.Astrophys.404:483-494,2003

Astronomy and Astrophysics

Astrophysics

12 pages, 8 figures, Accepted version of A&A paper - revised nomenclature. Higher resolution figures available from ftp://ft

Scientific paper

10.1051/0004-6361:20030503

We present Gemini-N GMOS and CFHT MOS spectroscopy of Wolf-Rayet candidates in the Local Group dwarf galaxy IC10 that were previously identified by Massey et al. and Royer et al. From the present spectroscopic survey, the WC/WN ratio for IC10 remains unusually high, given its low metallicity, although none of the WC9 stars suspected from narrow-band imaging are confirmed. Our spectroscopy confirms 9 newly discovered Wolf-Rayet candidates from Royer et al., whilst spectral types of 14 Wolf-Rayet stars previously observed by Massey & Armandroff are refined here. In total, there are 26 spectroscopically confirmed Wolf-Rayet stars in IC~10. All but one of the fourteen WC stars are WC4-6 stars, the exception being # 10 from Massey et al., a broad-lined, apparently single WC7 star. There are a total of eleven WN stars, which are predominantly early WN3-4 stars, but include a rare WN10 star, #8 from Royer et al. #5 from Massey et al. is newly identified as a transition WN/C star. Consequently, the WC/WN ratio for IC10 is 14/11=1.3, unusually high for a metal-poor galaxy. Re-evaluating recent photometric data of Massey & Holmes, we suggest that the true WC/WN ratio may not be as low as 0.3. Finally, we present ground-based finding charts for all confirmed WR stars, plus HST/WFPC2 charts for twelve cases.

Affiliated with

Also associated with

No associations

Rating

Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-544773