2019MNRAS.485L.136J

Query : 2019MNRAS.485L.136J

2019MNRAS.485L.136J - Mon. Not. R. Astron. Soc., 485, L136-L140 (2019/May-1)

Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey.

JACKMAN J.A.G., WHEATLEY P.J., BAYLISS D., BURLEIGH M.R., CASEWELL S.L., EIGMULLER P., GOAD M.R., POLLACCO D., RAYNARD L., WATSON C.A. and WEST R.G.

Abstract (from CDS):

We present the detection of a ΔV ∼ -10 flare from the ultracool L2.5 dwarf ULAS J224940.13-011236.9 with the Next Generation Transit Survey (NGTS). The flare was detected in a targeted search of late-type stars in NGTS full-frame images and represents one of the largest flares ever observed from an ultracool dwarf. This flare also extends the detection of white-light flares to stars with temperatures below 2000 K. We calculate the energy of the flare to be 3.4+0.9–0.7×1033 erg, making it an order of magnitude more energetic than the Carrington event on the Sun. Our data show how the high-cadence NGTS full-frame images can be used to probe white-light flaring behaviour in the latest spectral types.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: flare - stars: individual: ULAS J224940.13-011236.9 - stars: low-mass

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J00540655-0031018 BD* 00 54 06.5846250888 -00 31 02.180997624           L2.2V 25 0
2 2MASS J05334148+0014348 BD* 05 33 41.48688 +00 14 34.8252           L0 13 0
3 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
4 SIPS J1232-0951 BD* 12 32 18.27456 -09 51 50.2632         16.97 L0 25 0
5 2MASS J19064801+4011089 BD* 19 06 48.0751379413 +40 11 08.590575770           L1 41 0
6 2MASS J22494010-0112372 LM* 22 49 40.11936 -01 12 37.0764           M12 6 0

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