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

Jackman, James A. G. and Wheatley, P. and Bayliss, Daniel and Burleigh, M. and Casewell, Sarah L. and Eigmüller, Philipp and Goad, M and Pollacco, D. and Raynard, L. and Watson, C. and West, Richard G. (2019) Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey. Monthly Notices of the Royal Astronomical Society: Letters, 485 (1), L136-L140. Oxford University Press. DOI: 10.1093/mnrasl/slz039 ISSN 1745-3925

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Abstract

We present the detection of a ∆V ̃ -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}× 10^{33} 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.

Item URL in elib:https://elib.dlr.de/127789/
Document Type:Article
Title:Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jackman, James A. G.epartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Wheatley, P.Dept. of Physics, University of Warwick, United KingdomUNSPECIFIED
Bayliss, DanielUniversity of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, UKUNSPECIFIED
Burleigh, M.Dept. of Physics and Astronomy, University of Leicester, United KingdomUNSPECIFIED
Casewell, Sarah L.Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Goad, MDepartment of Physics & Astronomy, University of LeicesterUNSPECIFIED
Pollacco, D.Department of Physics, University of Warwick, Coventry CV4 7AL, UKUNSPECIFIED
Raynard, L.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, LE1 7RH, UKUNSPECIFIED
Watson, C.Astrophysics Research Centre, Queens University Belfast, United KingdomUNSPECIFIED
West, Richard G.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Date:2019
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society: Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:485
DOI :10.1093/mnrasl/slz039
Page Range:L136-L140
Publisher:Oxford University Press
ISSN:1745-3925
Status:Published
Keywords:stars: flare, stars: individual: ULAS J224940.13-011236.9, stars: low-mass, Astrophysics - Solar and Stellar Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Project PLATO
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Eigmüller, Dr. Philipp
Deposited On:14 Jun 2019 08:12
Last Modified:31 Jul 2019 20:25

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