Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-06-03
Astronomy and Astrophysics
Astrophysics
Accepted for publication in the ApJ, October 2000 (23 pages, 4 tables, 11 figures)
Scientific paper
10.1086/309491
The first stellar abundances in M31 are presented, based on Keck I HIRES spectroscopy and model atmospheres analyses of three A-F supergiants, 41-2368, 41-3712, and A-207. We also present the preliminary analysis of a fourth star, 41-3654. We find that the stellar oxygen abundances are in good agreement with those determined from nebular studies, even though the stars do {\it not} show a clear radial gradient in oxygen. The uncertainties in the stellar abundances are smaller than the range in the nebular results, making these stars ideal objects for further studies of the distribution of oxygen in M31. We show that the stars can be used to study the abundance distributions of other elements as well, including iron-group and heavier elements. The A-F supergiants also provide direct information on the metallicity and reddening of nearby Cepheid stars. We have examined the metallicity and reddening assumptions used for Cepheids within 1' of our targets and noted the differences from values used in the literature.
Kudritzki Rolf Peter
Lemke Michael
Lennon Daniel J.
McCarthy James K.
Przybilla Norbert
No associations
LandOfFree
Analysis of Four A-F Supergiants in M31 from Keck HIRES Spectroscopy 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 Analysis of Four A-F Supergiants in M31 from Keck HIRES Spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of Four A-F Supergiants in M31 from Keck HIRES Spectroscopy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-410375