Metal-poor stars spectroscopy. II (Axer+, 1995)

Details Metal-poor stars spectroscopy. II (Axer+, 1995) Metal-poor stars spectroscopy. II (Axer+, 1995)

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..33000751a&link_type=abstract

VizieR On-line Data Catalog: J/A+A/300/751. Originally published in: 1995A&A...300..751A

Physics

Stars: Metal-Deficient, Stars: Masses, Stars: Distances

Scientific paper

Models of post-main sequence stellar evolution of VandenBerg & Bell have been applied to determine spectroscopic masses and distances for metal-poor stars. Careful consideration of the most important error sources published in more recent papers such as VandenBerg for the first time allow us to draw firm statistical conclusions. It is shown that the evolutionary calculations qualitatively fit to the observed stellar parameters whereas quantitatively they predict too high ages for metal-poor stars. As an important result we confirm that evolutionary sequences need to be calibrated with respect to their metal abundance in order to use their absolute predictions of temperature and luminosity. In our spectroscopic analyses the strong dependence between surface gravity and abundances determined from Fe I lines restricts the accuracy of Fe abundances in subgiants to 0.1 dex at best. The most remarkable result of our evolutionary and kinematic investigations of halo stars refers to the large fraction of slightly evolved subgiants among the so-called subdwarfs. Since conventional photometric approaches often assume that the great majority of metal-poor stars are dwarfs this results in distances that are systematically too low for their samples. (4 data files).

Affiliated with

Also associated with

No associations

Rating

Metal-poor stars spectroscopy. II (Axer+, 1995) 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 Metal-poor stars spectroscopy. II (Axer+, 1995), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal-poor stars spectroscopy. II (Axer+, 1995) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-838638