Observational evidence of optical variability in L dwarfs

dc.contributor.author	Maiti, M
dc.date.accessioned	2007-06-16T04:56:22Z
dc.date.available	2007-06-16T04:56:22Z
dc.date.issued	2007-04
dc.identifier.citation	Astronomical Journal, Vol. 133, pp. 1633 - 1644	en
dc.identifier.uri	http://hdl.handle.net/2248/1644
dc.description.abstract	The results of quasi-simultaneous continuous monitoring of six L dwarfs in the R and I bands are presented. A careful analysis of the data shows that the object 2MASSW J0036+1821 is variable in the I and R bands. The amplitudes of our variable object were found to be 0.010 in the I band and 0.030 in the R band. Interestingly, while 2MASSW J0036+1821 was variable in the I band, it remained nonvariable in the R band, and vice versa. As most of the previous variability search programs of L dwarfs were carried out in the I band, this is the first evidence of this type of strange phenomena. The time evolution and rapid formation of dust on a macroscopic scale can plausibly produce this type of nonperiodic random variability	en
dc.format.extent	934507 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	The American Astronomical Society	en
dc.relation.uri	http://www.iop.org/EJ/abstract/1538-3881/133/4/1633	en
dc.subject	stars: low-mass	en
dc.subject	brown dwarfs	en
dc.subject	stars: rotation	en
dc.subject	stars: variables	en
dc.title	Observational evidence of optical variability in L dwarfs	en
dc.type	Article	en