Open AccessA mini‐survey for variability in early L dwarfs
Author(s) -
Clarke F. J.,
Oppenheimer B. R.,
Tinney C. G.
Publication year - 2002
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 - 10.1046/j.1365-8711.2002.05691.x
Subject(s) - physics , photometry (optics) , astrophysics , brown dwarf , astronomy , stars
We report differential I ‐band photometry of four early L dwarfs, obtained to study variability. We detect variability on a time‐scale of hours in two objects, 2MASS 0746425+200032 (at a level of 0.007 mag = 6.5σ) and 2MASS 1108307+683017 (0.012 mag; 5σ). We also place upper limits of 0.02 mag (1σ) on the variability of two others.