Ultra-cool dwarfs (UCD) are stellar or substellar objects of spectral class M with masses no more than
Detection of new UCD flares and their detailed study is necessary to better understand the origin of these events and their interactions between the magnetic fields and the surfaces of ultracool stars.
One of the tools that can helpdetection of new outbreaks on UCD is GWAC. It is one of the main ground objects of the planned Space Variable Objects Monitor (SVOM) satellite, a joint Sino-French satellite mission dedicated to detecting and studying gamma-ray bursts (GRBs).
Now a group of astronomers led by Li-PingXinya from the National Astronomical Observatory of the Chinese Academy of Sciences (CAS) reports the discovery of a powerful flare on SDSS J013333.08 + 003223.7 — UCD spectral class M9. It was spotted 471 light years away. The flare appeared to be more powerful than typical flares usually recorded on UCD.
According to the study, bolometricThe energy of the superflare ranged from 55.6 to 92.5 decillion ergs, making it one of the most powerful flares on ultra-cold stars. Its magnetic strength was estimated at 3.6-4.7 kG. The total flow duration from onset to resting level was calculated to be approximately 14,465 seconds.
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