K2 Ultracool Dwarfs Survey – V. High superflare rates on rapidly rotating late-M dwarfs
| dc.contributor.author | Paudel, Rishi R. | |
| dc.contributor.author | Gizis, J. E. | |
| dc.contributor.author | Mullan, D. J. | |
| dc.contributor.author | Schmidt, S. J. | |
| dc.contributor.author | Burgasser, A. J. | |
| dc.contributor.author | Williams, P. K. G. | |
| dc.contributor.author | Youngblood, A. | |
| dc.contributor.author | Stassun, K G | |
| dc.date.accessioned | 2022-02-09T15:26:19Z | |
| dc.date.available | 2022-02-09T15:26:19Z | |
| dc.date.issued | 2019-04-04 | |
| dc.description.abstract | We observed strong superflares (defined as flares with energy in excess of 10³³ erg) on three late-M dwarfs: 2MASS J08315742+2042213 (hereafter 2M0831+2042; M7 V), 2MASS J08371832+2050349 (hereafter 2M0837+2050; M8 V), and 2MASS J08312608+2244586 (hereafter 2M0831+2244; M9 V). 2M0831+2042 and 2M0837+2050 are members of the young (∼700 Myr) open cluster Praesepe. The strong superflare on 2M0831+2042 has an equivalent duration (ED) of 13.7 h and an estimated energy of 1.3 × 1035 erg. We observed five superflares on 2M0837+2050, on which the strongest superflare has an ED of 46.4 h and an estimated energy of 3.5 × 10³⁵ erg. This energy is larger by 2.7 orders of magnitude than the largest flare observed on the older (7.6 Gyr) planet-hosting M8 dwarf TRAPPIST-1. Furthermore, we also observed five superflares on 2M0831+2244 which is probably a field star. The estimated energy of the strongest superflare on 2M0831+2244 is 6.1 × 10³⁴ erg. 2M0831+2042, 2M0837+2050, and 2M0831+2244 have rotation periods of 0.556 ± 0.002, 0.193 ± 0.000, and 0.292 ± 0.001 d, respectively, which we measured by using K2 light curves. We compare the flares of younger targets with those of TRAPPIST-1 and discuss the possible impacts of such flares on planets in the habitable zone of late-M dwarfs. | en_US |
| dc.description.sponsorship | The material in this paper is based upon work supported by the National Aeronautics and Space Administration (NASA) under award Nos. NNX15AV64G, NNX16AE55G and NNX16AJ22G. RRP acknowledges support from University of Delaware Dissertation Fellowship program. Some/all of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate. This work has made use of data from the European Space Agency (ESA) mission Gaia (https: //www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web /gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of the VizieR catalogue access tool,CDS, Strasbourg, France. The original description of the VizieR service was published in A&AS 143, 23. This work made use of the http://gaia-kepler.fun crossmatch database created by Megan Bedell. | en_US |
| dc.description.uri | https://academic.oup.com/mnras/article/486/1/1438/5427921 | en_US |
| dc.format.extent | 10 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2rwrb-s8uo | |
| dc.identifier.citation | R R Paudel, J E Gizis, D J Mullan, S J Schmidt, A J Burgasser, P K G Williams, A Youngblood, K G Stassun, K2 Ultracool Dwarfs Survey – V. High superflare rates on rapidly rotating late-M dwarfs, Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 1, June 2019, Pages 1438–1447, https://doi.org/10.1093/mnras/stz886 | en_US |
| dc.identifier.uri | https://doi.org/10.1093/mnras/stz886 | |
| dc.identifier.uri | http://hdl.handle.net/11603/24158 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Oxford University Press | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | en_US |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | K2 Ultracool Dwarfs Survey – V. High superflare rates on rapidly rotating late-M dwarfs | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-8090-3570 | en_US |