Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1407r&link_type=abstract
American Astronomical Society, AAS Meeting #211, #14.07; Bulletin of the American Astronomical Society, Vol. 39, p.760
Astronomy and Astrophysics
Astronomy
Scientific paper
Determining the luminosity function of different regions of the Milky Way is essential to our understanding of Galactic evolutionary processes. As part of an ongoing research project at Ball State University, we have used CaH photometry to distinguish between M dwarfs and M giants in Kaptyn's Selected Area 109 (SA109). The presence of CaH in the spectra of M dwarfs, and its absence in M giants, is a physical signature of the greater gravitational surface pressure in M dwarfs. Thus, plotting the similar R-I colors of M stars, against the discriminating CaH-r colors between M types, gives us a clear classification method. We present the results for data from the SARA telescope for half of the fields which comprise the whole square degree of SA109. With a limiting magnitude near R=15 we identified numbers of early M dwarfs similar to predictions using the luminosity function for nearby stars. This project was funded by a partnership between the NSF grant AST-0552798, REU, DoD ASSURE programs and Ball State University.
Jordan Thomas M.
Mace Gregory N.
Robertson Thomas H.
No associations
LandOfFree
The Luminosity Function of Early M Dwarf Stars in Selected Area 109 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 Luminosity Function of Early M Dwarf Stars in Selected Area 109, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Luminosity Function of Early M Dwarf Stars in Selected Area 109 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1474980