ASASSN-16ae: A POWERFUL WHITE-LIGHT FLARE ON AN EARLY-L DWARF

作者：Schmidt, Sarah J.^*; Shappee, Benjamin J.; Gagne, Jonathan; Stanek, K. Z.; Prieto, Jose L.; Holoien, Thomas W. -S.; Kochanek, C. S.; Chomiuk, Laura; Dong, Subo; Seibert, Mark; Strader, Jay

来源：Astrophysical Journal Letters, 2016, 828(2): L22.

DOI：10.3847/2041-8205/828/2/L22

• brown dwarfs
• stars: chromospheres
• stars: flare
• stars: individual (SDSS J053341.43+001413.1)
• stars: low-mass

We report the discovery and classification of SDSS J053341.43+001434.1 (SDSS0533), an early-L dwarf first discovered during a powerful Delta V < -11 magnitude flare observed as part of the ASAS-SN survey. Optical and infrared spectroscopy indicate a spectral type of L0 with strong H alpha emission and a blue NIR spectral slope. Combining the photometric distance, proper motion, and radial velocity of SDSS0533 yields three-dimensional velocities of (U, V, W) = (14 +/- 13, -35 +/- 14, -94 +/- 22) km s(-1), indicating that it is most likely part of the thick disk population and probably old. The three detections of SDSS0533 obtained during the flare are consistent with a total V-band flare energy of at least 4.9 x 10(33) erg (corresponding to a total thermal energy of at least E-tot > 3.7 x 10(34) erg), placing it among the strongest detected M dwarf flares. The presence of this powerful flare on an old L0 dwarf may indicate that stellar-type magnetic activity persists down to the end of the main sequence and on older ML transition dwarfs.

• 出版日期2016-9-10
• 单位北京大学