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:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
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, UK	UNSPECIFIED	UNSPECIFIED
Wheatley, P.	Dept. of Physics, University of Warwick, United Kingdom	UNSPECIFIED	UNSPECIFIED
Bayliss, Daniel	University of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Burleigh, M.	Dept. of Physics and Astronomy, University of Leicester, United Kingdom	UNSPECIFIED	UNSPECIFIED
Casewell, Sarah L.	Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Eigmüller, Philipp	UNSPECIFIED	https://orcid.org/0000-0003-4096-0594	UNSPECIFIED
Goad, M	Department of Physics & Astronomy, University of Leicester	UNSPECIFIED	UNSPECIFIED
Pollacco, D.	Department of Physics, University of Warwick, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Raynard, L.	Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Watson, C.	Astrophysics Research Centre, Queens University Belfast, United Kingdom	UNSPECIFIED	UNSPECIFIED
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, UK	UNSPECIFIED	UNSPECIFIED

Date:

2019

Journal or Publication Title:

Monthly Notices of the Royal Astronomical Society: Letters

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

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 Exploration

DLR - Research area:

Raumfahrt

DLR - Program:

R EW - Space Exploration

DLR - Research theme (Project):

R - Project PLATO (old)

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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