CNO at the surface of low and intermediate MS stars

Details CNO at the surface of low and intermediate MS stars CNO at the surface of low and intermediate MS stars

2002-10-31

arxiv.org/abs/astro-ph/0210685v1

Astronomy and Astrophysics

Astrophysics

Invited review at the conference "CNO in the Universe", St-Luc, Switzerland, September 10-14, 2002. To be published in ASP Con

Scientific paper

Recent studies of spectral lines of the CNO elements in the Sun and unevolved disk and halo stars show that most published abundance data may be affected by systematic errors due to inadequate 1D modelling of stellar atmospheres. This raises doubts about previously derived trends of CNO abundances as a function of [Fe/H]. In this review we concentrate on abundance ratios derived from weak spectral features with similar dependences on temperature and pressure, which ratios are then relatively insensitive to 3D model atmosphere effects and to effective temperature and surface gravity. The recent controversy about the trend of [O/Fe] vs. [Fe/H] is discussed, new results for C/O ratios as determined from forbidden lines and high excitation neutral lines are presented, and N/C ratios derived from NH and CH lines are commented on.

Affiliated with

Also associated with

No associations

Rating

CNO at the surface of low and intermediate MS stars 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 CNO at the surface of low and intermediate MS stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CNO at the surface of low and intermediate MS stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-577723