Imaging polarimetry with the Very Large Telescope: recent results on field brown dwarfs

Francois Menard; Xavier Delfosse; Jean-Louis Monin; Nicholas Peretto

doi:10.1117/12.459359

14 February 2003 Imaging polarimetry with the Very Large Telescope: recent results on field brown dwarfs

Francois Menard, Xavier Delfosse, Jean-Louis Monin, Nicholas Peretto

Proceedings Volume 4843, Polarimetry in Astronomy; (2003) https://doi.org/10.1117/12.459359
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We present optical linear polarimetry of 9 ultra cool field dwarfs. The linear polarisation of each L dwarf we measured is less than 0.2 percent. Three dwarfs have polarisations compatible with zero, two are marginal detections, and three have significant polarisation. Due to their small distance, an insterstellar origin for the detected polarisation can be safely ruled out. Our detections confirm that dust is present in the atmosphere of these L dwarfs and that the scattering geometry is not symmetric.

Citation Download Citation

Francois Menard, Xavier Delfosse, Jean-Louis Monin, and Nicholas Peretto "Imaging polarimetry with the Very Large Telescope: recent results on field brown dwarfs", Proc. SPIE 4843, Polarimetry in Astronomy, (14 February 2003); https://doi.org/10.1117/12.459359

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