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

作者：Burningham Ben^*; Hardcastle M; Nichols J D; Casewell S L; Littlefair S P; Stark C; Burleigh M R; Metchev S; Tannock M E; van Weeren R J; Williams W L; Wynn G A

来源：Monthly Notices of the Royal Astronomical Society, 2016, 463(2): 2202-2209.

DOI：10.1093/mnras/stw2065

• surveys
• brown dwarfs
• stars: low-mass

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 h 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.

• 出版日期2016-12-1