Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-08-15
Astrophys.J. 577 (2002) L107-L110
Astronomy and Astrophysics
Astrophysics
9 pages, 4 figures, 2 tables. Accepted for publication in the Astrophysical Journal Letters
Scientific paper
10.1086/344241
We have discovered an Ofpe/WN9 (WN11 following Smith et al.) star in the Sculptor spiral galaxy NGC 300, the first object of this class found outside the Local Group, during a recent spectroscopic survey of blue supergiant stars obtained at the ESO VLT. The light curve over a five-month period in late 1999 displays a variability at the 0.1 mag level. The intermediate resolution spectra (3800-7200 A) show a very close resemblance to the Galactic LBV AG Car during minimum. We have performed a detailed non-LTE analysis of the stellar spectrum, and have derived a chemical abundance pattern which includes H, He, C, N, O, Al, Si and Fe, in addition to the stellar and wind parameters. The derived stellar properties and the He and N surface enrichments are consistent with those of other Local Group WN11 stars in the literature, suggesting a similar quiescent or post-LBV evolutionary status.
Bresolin Fabio
Gieren Wolfgang
Kudritzki Rolf Peter
Najarro Francisco
Pietrzynski Grzegorz
No associations
LandOfFree
Discovery and quantitative spectral analysis of an Ofpe/WN9 (WN11) star in the Sculptor spiral galaxy NGC 300 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 Discovery and quantitative spectral analysis of an Ofpe/WN9 (WN11) star in the Sculptor spiral galaxy NGC 300, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery and quantitative spectral analysis of an Ofpe/WN9 (WN11) star in the Sculptor spiral galaxy NGC 300 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-514760