A LOFAR mini-survey for low-frequency radio emission from the nearest brown dwarfs

Ben Burningham, Martin Hardcastle, Jonathan Nichols, Sarah Casewell, Stuart Littlefair, Craig Stark, Matthew Burleigh, Stanimir Metchev, Megan Tannock, Reinout van Weeren, Wendy Louise Williams, Graham Wynn

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Abstract

We have conducted a mini-survey for low-frequency radio emission from some of the closest brown dwarfs to the Sun with rapid rotation rates: SIMP J013656.5+093347, WISEPC J150649.97+702736.0, and WISEPA J174124.26+255319.5. We have placed robust 3-sigma upper limits on the flux density in the 111 - 169 MHz frequency range for these targets: WISE 1506: < 0.72 mJy; WISE 1741: < 0.87 mJy; SIMP 0136: < 0.66 mJy. At 8 hours of integration per target to achieve these limits, we find that systematic and detailed study of this class of object at LOFAR frequencies will require a substantial dedication of resources.
Original languageEnglish
Pages (from-to)2202-2209
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume463
Issue number2
Early online date19 Aug 2016
DOIs
Publication statusPublished - 1 Dec 2016

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