Open AccessMulticolour time series photometry of 2MASS 1207−3932
Author(s) -
Koen C.
Publication year - 2008
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2008.13616.x
Subject(s) - physics , photometry (optics) , astrophysics , amplitude , sky , astronomy , accretion disc , light curve , stars , optics
Time series photometry in VRI of the young brown dwarf Two‐Micron All‐Sky Survey (2MASS) J1207334−393254 is presented. Variability in I is insignificant, but amplitudes up to ∼0.2 mag in R , and ∼0.55 mag in V , are seen within a single night. There is also microvariability on time‐scales of an hour or so, which appears to be present in data from all the three filters. There may be a non‐sinusoidal periodicity of about half a day in the V and R data. A likely explanation for the variability is the presence of accretion hot spots.