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dc.contributor.authorButler, Rayen
dc.date.accessioned2011-03-10T16:56:53Zen
dc.date.available2011-03-10T16:56:53Zen
dc.date.issued2007en
dc.identifier.citationC. Lane, G. Hallinan, R. T. Zavala, R. F. Butler, R. P. Boyle, S. Bourke, A. A...(2007)Rotational Modulation of M/L Dwarfs due to Magnetic Spots,en
dc.identifier.urihttp://hdl.handle.net/10379/1730en
dc.description.abstractWe find periodic I-band variability in two ultracool dwarfs, TVLM 513-46546 and 2MASS J00361617+1821104, on either side of the M/L dwarf boundary. Both of these targets are short-period radio transients, with the detected I-band periods matching those found at radio wavelengths (P=1.96 hr for TVLM 513-46546, and P=3 hr for 2MASS J00361617+1821104). We attribute the detected I-band periodicities to the periods of rotation of the dwarfs, supported by radius estimates and measured $v$ sin $i$ values for the objects. Based on the detected period of rotation of TVLM 513-46546 (M9) in the I-band, along with confirmation of strong magnetic fields from recent radio observations, we argue for magnetically induced spots as the cause of this periodic variability. The I-band rotational modulation of L3.5 dwarf 2MASS J00361617+1821104 appeared to vary in amplitude with time. We conclude that the most likely cause of the I-band variability for this object is magnetic spots, possibly coupled with time-evolving features such as dust clouds.en
dc.formatapplication/pdfen
dc.language.isoenen
dc.subjectAstrophysicsen
dc.titleRotational Modulation of M/L Dwarfs due to Magnetic Spotsen
dc.typeArticleen
dc.local.publishedsourcehttp://arxiv.org/pdf/0709.1045en
dc.description.peer-reviewedpeer-revieweden
dc.local.authorsC. Lane, G. Hallinan, R. T. Zavala, R. F. Butler, R. P. Boyle, S. Bourke, A. Antonova, J. G. Doyle, F. J. Vrba and A. Goldenen
dc.local.arxivid0709.1045en
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