Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B

Details Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B

1996-03-05

arxiv.org/abs/astro-ph/9603019v2

Astronomy and Astrophysics

Astrophysics

14 pages, latex, AASTEX, figures not included, full text plus figures available at http://brian.la.asu.edu/ or at ftp://bria

Scientific paper

We present preliminary non-grey model atmospheres and interiors for cool brown dwarfs. The resulting synthetic spectra are compared to available spectroscopic and photometric observations of the coolest brown dwarf yet discovered, Gl229B (Nakajima \etal, 1995). Despite recognized shortcomings of current methane opacities, we find that the model spectra provide an excellent fit to most of the spectral features of the brown dwarf. We confirm the presence of methane absorption and the substellar nature of Gl229B. These preliminary models set an upper limit for the effective temperature of 1000~K. We also compute the evolution of brown dwarfs with solar composition and masses from 0.02 to 0.065 $\msol$. While uncertainties in the age of the system yield some undetermination for the mass of Gl229B, the most likely solution is $m\approx 0.04-0.055 \msol$. In any case, we can set an upper limit $m= 0.065\msol$ for a very unlikely age $t=10$ Gyr.

Affiliated with

Also associated with

No associations

Rating

Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B 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 Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthetic Spectra and Mass Determination of the Brown Dwarf Gl229B will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-365966