Now showing items 1-4 of 4
Phase connecting multi-epoch radio data for the ultracool dwarf tvlm 513-46546
(EDP Sciences, 2010-11-19)
Context. Radio data obtained for the ultracool dwarf TVLM 513-46546 has indicated a rotation period of approximate to 1.96 h via regular radio pulses, but how stable is this period. This has major implications regarding ...
Rotational modulation of the radio emission from the m9 dwarf tvlm 513−46546: broadband coherent emission at the substellar boundary?
(IOP Publishing, 2006-12-10)
The Very Large Array was used to observe the ultracool rapidly rotating M9 dwarf TVLM 513-46546 simultaneously at 4.88 and 8.44 GHz. The radio emission was determined to be persistent, variable, and periodic at both ...
Modelling the radio pulses of an ultracool dwarf
(EDP Sciences, 2010-11-30)
Context. Recently, unanticipated magnetic activity in ultracool dwarfs (UCDs, spectral classes later than M7) has emerged from a number of radio observations. The highly (up to 100%) circularly polarized nature and high ...
Confirmation of the electron cyclotron maser instability as the dominant source of radio emission from very low mass stars and brown dwarfs
(IOP Publishing, 2008-09-01)
We report on radio observations of the M8.5 dwarf LSR J1835+3259 and the L3.5 dwarf 2MASS J00361617+ 1821104, which provide the strongest evidence to date that the electron cyclotron maser instability is the dominant ...