a Mini-Survey of Magnetic Activity in L and T Brown Dwarfs

Details a Mini-Survey of Magnetic Activity in L and T Brown Dwarfs a Mini-Survey of Magnetic Activity in L and T Brown Dwarfs

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1648a&link_type=abstract

Chandra Proposal ID #06200570

Physics

Chandra Proposal Id #06200570

Scientific paper

We propose a mini-survey of magnetic activity in L and T brown dwarfs in the X-rays with Chandra and in the radio with the VLA and ATCA. Our mini-sample includes two L and one T brown dwarfs. Our Chandra exposures will reach X-ray luminosities down to log Lx/Lbol = -4. Our targets are close, old (~1 Gyr) brown dwarfs, whose Halpha emission should not be contaminated by any accretion mechanism as in young brown dwarfs. With this Chandra proposal, we aim at detecting X-rays during quiescence or flares. Coordination with the VLA and ATCA radio telescopes is proposed as well. Even if undetected, upper limits will provide strong constraints for models of magnetic activity at the very bottom of the main sequence.

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