NOAO >   Observing Info >   Approved Programs >   2018A-0219

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Program Information for 2018A-0219


PI: Jacqueline Faherty, American Museum of Natural History, jfaherty@amnh.org
Address: Department of astrophysics, American Museum of Natural History, New York, New York 10023 USA

CoI: Ben Burningham, University of Hertfordshire
CoI: Elieen Gonzales, American Museum of Natural History
CoI: Stuart Littlefair, University of Sheffield

Title: Weather and aurorae on one of the Sun’s nearest neighbours

Abstract: We will use SOAR/Spartan to flux calibrate our spectro-photometric timeseries to be obtained with VLT/X-Shooter in February 2018. These observations will, for the first time, combine wide full optical to near- infrared wavelength coverage and good spectral resolution ($Rsim 2000$) with spectro-photometric accuracy to provide the most detailed picture of weather and aurorae in an extra-solar context yet obtained. WISE~J104915.57-531906.1AB (Luhman 16AB) is a late-L+early-T binary at a heliocentric distance of just 2~pc. Both components display rotational photometric variability at the $sim% level which has been attributed to inhomogeneous dust clouds. New spectro-photometry for other, warmer, brown dwarfs has suggested that previously unrecognised auroral emission may give rise to the observed photometric variability. We will characterise the spectral variability with unparalleled precision and thus determine the relative contributions from dust weather and aurorae, and disentangle particle size effects from cloud depth and spatial coverage variability.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  SOAR/Spartan -- 1n on Feb 23 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0219

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