A Search for Pulsation in Brown Dwarfs

Details A Search for Pulsation in Brown Dwarfs A Search for Pulsation in Brown Dwarfs

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..372c&link_type=abstract

NOAO Proposal ID #2007B-0372

Physics

Scientific paper

Brown dwarfs constitute a crucial link between the processes of star formation and planet formation. To date, however, observational methods to determine important properties such as mass and age are lacking. Pulsation in brown dwarfs and very low mass stars is a newly suggested phenomenon that offers unprecedented opportunities to probe the interiors and evolution of these objects. We propose to identify pulsating substellar objects at a range of masses and ages. The CTIO 0.9-m telescope and CFCCD are ideally suited to this enterprise, and we will acquire precise time-series photometry on a sample of confirmed brown dwarfs in the young σ Orionis cluster. With hints of variability reported on the appropriate short timescales, these objects are some of the most promising candidates in a potential new class of pulsators. We aim to fully characterize light-curve periodicities down to millimagnitude amplitudes, and ultimately use the results to provide fundamental constraints on the interiors and properties of brown dwarfs.

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