Stellar flares detected with the Next Generation Transit Survey

被引：36

作者：

Jackman, James A. G. ^{[1
,2
,3
]}

Wheatley, Peter J. ^{[1
,2
]}

Acton, Jack S. ^{[4
]}

Anderson, David R. ^{[1
,2
]}

Bayliss, Daniel ^{[1
,2
]}

Briegal, Joshua T. ^{[5
]}

Burleigh, Matthew R. ^{[4
]}

Casewell, Sarah L. ^{[4
]}

Gansicke, Boris T. ^{[1
,2
]}

Gill, Samuel ^{[1
]}

Gillen, Edward ^{[5
,6
]}

Goad, Michael R. ^{[4
]}

Gunther, Maximilian N. ^{[7
,8
]}

Henderson, Beth A. ^{[4
]}

Hodgkin, Simon T. ^{[9
]}

Jenkins, James S. ^{[10
,11
]}

Pugh, Chloe ^{[1
]}

Queloz, Didier ^{[5
]}

Raynard, Liam ^{[4
]}

Tilbrook, Rosanna H. ^{[4
]}

Watson, Christopher A. ^{[12
]}

West, Richard G. ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[2] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[3] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[4] Univ Leicester, Sch Phys & Astron, Leicester LE1 7RH, Leics, England

[5] Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England

[6] Queen Mary Univ London, Astron Unit, Mile End Rd, London E1 4NS, England

[7] MIT, Dept Phys, Cambridge, MA 02139 USA

[8] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[9] Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[10] Univ Chile, Dept Astron, Camino Observ 1515,Casilla 36-D, Santiago, Chile

[11] Ctr Astrofis & Tecnol Afines CATA, Casilla 36-D, Santiago, Chile

[12] Queens Univ Belfast, Astrophys Res Ctr, 1 Univ Rd, Belfast BT7 1NN, Antrim, North Ireland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 504卷 / 03期

基金：

美国国家科学基金会; 美国国家航空航天局; 欧洲研究理事会;

关键词：

stars: flare; stars: rotation; starspots; ACTIVITY-ROTATION RELATIONSHIP; K2 ULTRACOOL DWARFS; WHITE-LIGHT FLARES; EARTH-LIKE PLANET; X-RAY-EMISSION; M-STARS; SUNSPOT ROTATION; COOL STARS; GAIA DR2; KEPLER;

D O I：

10.1093/mnras/stab979

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：3246 / 3264

页数：19

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