Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey-Reference-Cited by-同舟云学术

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

Published:2019-03-19 Issue:1 Volume:485 Page:L136-L140
ISSN:1745-3925
Container-title:Monthly Notices of the Royal Astronomical Society: Letters
language:en
Short-container-title:

Author:

Jackman James A G¹²^ORCID,Wheatley Peter J¹²^ORCID,Bayliss Daniel¹²^ORCID,Burleigh Matthew R³,Casewell Sarah L³,Eigmüller Philipp⁴⁵,Goad Mike R³,Pollacco Don¹²,Raynard Liam³^ORCID,Watson Christopher A⁶,West Richard G¹²^ORCID

Affiliation:

1. Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK

2. Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK

3. Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK

4. Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany

5. Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany

6. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, UK

Abstract

Abstract 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 $3.4^{+0.9}_{-0.7}\times 10^{33}$ 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.

Funder

University of Warwick

University of Leicester

University of Geneva

University of Cambridge

Science and Technology Facilities Council

University of California

Jet Propulsion Laboratory

California Institute of Technology

National Aeronautics and Space Administration

Publisher

Oxford University Press (OUP)