Variability in brown dwarfs: atmospheres and transits

Details Variability in brown dwarfs: atmospheres and transits Variability in brown dwarfs: atmospheres and transits

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.485..261c&link_type=abstract

In: Proceedings of the First Eddington Workshop on Stellar Structure and Habitable Planet Finding, 11 - 15 June 2001, Córdoba, S

Astronomy and Astrophysics

Astronomy

2

Brown Dwarfs, Planetary Systems, Habitable Zones, Infrared Astronomy

Scientific paper

We have obtained series of continuous differential photometry in the J and KS bands for several L-type dwarfs. We intend to search for photometric variability in order to: - investigate the variability amplitude associated to atmospheric changes in time-scales from minutes to several hours, - investigate rotation periods through light curve modulation due to superficial inhomogeneities, - set constraints on the frequency of flares in these fully convective objects, - search for transits of brown dwarfs and planetary companions in very close orbits (including habitable zones). First results obtained for the brown dwarf 2M1146+22 are presented.

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