The Near Infrared NaI Doublet Feature in M Stars

Details The Near Infrared NaI Doublet Feature in M Stars The Near Infrared NaI Doublet Feature in M Stars

1996-10-29

arxiv.org/abs/astro-ph/9610243v1

Astronomy and Astrophysics

Astrophysics

9 pages, (TeX file) + 7 Figures in Postscript format. Accepted for publication in The Astrophysical Journal

Scientific paper

10.1086/303907

The NaI near-infrared doublet has been used to indicate the dwarf/giant population in composite systems, but its interpretation is still a contentious issue. In order to understand the behaviour of this controversial feature, we study the observed and synthetic spectra of cool stars. We conclude that the NaI infrared feature can be used as a dwarf/giant discriminator. We propose a modified definition of the NaI index by locating the red continuum at 8234 angstrons and by measuring the equivalent width in the range 8172-8197 angstrons, avoiding the region at lambda > 8197 angstrons, which contains VI, ZrI, FeI and TiO lines. We also study the dependence of this feature on stellar atmospheric parameters.

Affiliated with

Also associated with

No associations

Rating

The Near Infrared NaI Doublet Feature in M 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 The Near Infrared NaI Doublet Feature in M Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Near Infrared NaI Doublet Feature in M Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-575365