Stellar flares detected with the Next Generation Transit Survey-Reference-Cited by-同舟云学术

Stellar flares detected with the Next Generation Transit Survey

Published:2021-04-14 Issue:3 Volume:504 Page:3246-3264
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Jackman James A G¹²³^ORCID,Wheatley Peter J¹²^ORCID,Acton Jack S⁴,Anderson David R¹²^ORCID,Bayliss Daniel¹²^ORCID,Briegal Joshua T⁵,Burleigh Matthew R⁴,Casewell Sarah L⁴,Gänsicke Boris T¹²^ORCID,Gill Samuel¹,Gillen Edward⁵⁶^ORCID,Goad Michael R⁴,Günther Maximilian N⁷^ORCID,Henderson Beth A⁴,Hodgkin Simon T⁸,Jenkins James S⁹¹⁰^ORCID,Pugh Chloe¹,Queloz Didier⁵,Raynard Liam⁴^ORCID,Tilbrook Rosanna H⁴,Watson Christopher A¹¹,West Richard G¹^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. School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA

4. School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK

5. Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK

6. Astronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UK

7. Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

8. Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK

9. Departamento de Astronomıa, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Casilla 36-D, Santiago, Chile

10. Centro de Astrofísica y Tecnologías Afines (CATA), Casilla 36-D, Santiago, Chile

11. Astrophysics Research Centre, Queen’s University of Belfast, 1 University Road, Belfast BT7 1NN, UK

Abstract

ABSTRACT We present the results of a search for stellar flares in the first data release from the Next Generation Transit Survey (NGTS). We have found 610 flares from 339 stars, with spectral types between F8 and M6, the majority of which belong to the Galactic thin disc. We have used the 13-s cadence NGTS light curves to measure flare properties such as the flare amplitude, duration, and bolometric energy. We have measured the average flare occurrence rates of K and early to mid-M stars and present a generalized method to measure these rates while accounting for changing detection sensitivities. We find that field age K and early M stars show similar flare behaviour, while fully convective M stars exhibit increased white-light flaring activity, which we attribute to their increased spin-down time. We have also studied the average flare rates of pre-main-sequence K and M stars, showing they exhibit increased flare activity relative to their main-sequence counterparts.

Funder

University of Warwick

University of Leicester

Queen's University Belfast

University of Geneva

Deutsches Zentrum für Luft- und Raumfahrt

University of Cambridge

STFC

Space Telescope Science Institute

National Aeronautics and Space Administration

Leverhulme Trust

European Research Council