2MASS Brown Dwarfs and the Substellar Mass Function

Details 2MASS Brown Dwarfs and the Substellar Mass Function 2MASS Brown Dwarfs and the Substellar Mass Function

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.5517r&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #55.17; Bulletin of the American Astronomical Society, Vol. 30, p.901

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Analysis of a complete sample of brown dwarf candidates with (J-K) > 1.30 and K < 14.5, drawn from 2MASS observations of 420 square degrees, or 1 percent of the sky, confirms 17 sources as extremely cool, meta-M dwarfs. Five of the 17 have detectable (> 2 Angstroms equivalent width) lithium absorption in Keck LRIS spectra, implying masses of less than 0.07 solar masses. While none of these objects has a measured parallax, we have compared the observed effective temperature and lithium-depletion distributions against predictions based on Monte Carlo simulations. The latter use the recent Burrows et al theoretical calculations to model brown dwarf characteristics (L(M, t), Temp(M, t)), and, based on a variety of assumed mass functions and star-formation histories, predict the (K, (J-K)) colour-magnitude diagram described by local brown dwarfs. These simulations can be "observed" with 2MASS-equivalent filter. This paper presents the initial results from comparisons between the models and reality.

Affiliated with

Also associated with

No associations

Rating

2MASS Brown Dwarfs and the Substellar Mass Function 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 2MASS Brown Dwarfs and the Substellar Mass Function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 2MASS Brown Dwarfs and the Substellar Mass Function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1364907