Parallaxes and physical properties of 11 mid-to-late T dwarfs

Details Parallaxes and physical properties of 11 mid-to-late T dwarfs Parallaxes and physical properties of 11 mid-to-late T dwarfs

2010-10-06

arxiv.org/abs/1010.1135v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

11 pages, 6 figures, accepted for publication in A&A

Scientific paper

We present parallaxes of 11 mid-to-late T dwarfs observed in the UKIRT Infrared Deep Sky Survey. We use these results to test the reliability of model predictions in magnitude-color space, determine a magnitude-spectral type calibration, and, estimate a bolometric luminosity and effective temperature range for the targets. We used observations from the UKIRT WFCAM instrument pipeline processed at the Cambridge Astronomical Survey Unit. The parallaxes and proper motions of the sample were calculated using standard procedures. The bolometric luminosity was estimated using near- and mid-infrared observations with two different methods. The corresponding effective temperature ranges were found adopting a large age-radius range. We show the models are unable to predict the colors of the latest T dwarfs indicating the incompleteness of model opacities for NH3, CH4 and H2 as the temperature declines. We report the effective temperature ranges obtained.

Affiliated with

Also associated with

No associations

Rating

Parallaxes and physical properties of 11 mid-to-late T dwarfs 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 Parallaxes and physical properties of 11 mid-to-late T dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parallaxes and physical properties of 11 mid-to-late T dwarfs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-427672