Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey
| Autor: | Christopher A. Watson, Philipp Eigmüller, Matthew R. Burleigh, M. R. Goad, Richard G. West, Liam Raynard, James A. G. Jackman, Daniel Bayliss, Don Pollacco, Peter J. Wheatley, Sarah L. Casewell |
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| Rok vydání: | 2019 |
| Předmět: |
Extrasolare Planeten und Atmosphären
Physics Data products 010308 nuclear & particles physics FOS: Physical sciences Library science Astronomy and Astrophysics Astrophysics 01 natural sciences Infrared Processing and Analysis Center Astrophysics - Solar and Stellar Astrophysics stars: low-mass Space and Planetary Science Observatory 0103 physical sciences White light stars: flare stars: individual: ULAS J224940.13-011236.9 010303 astronomy & astrophysics Transit (satellite) Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | Monthly Notices of the Royal Astronomical Society: Letters. 485:L136-L140 |
| ISSN: | 1745-3933 1745-3925 |
| DOI: | 10.1093/mnrasl/slz039 |
| Popis: | We present the detection of a $\Delta V\sim$ -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 $3.4^{+0.9}_{-0.7}\times10^{33}$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. Comment: 5 pages, 2 figures, Accepted for Publication in the Monthly Notices of the Royal Astronomical Society |
| Databáze: | OpenAIRE |
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