Chrome Extension
WeChat Mini Program
Use on ChatGLM

Minutes-duration Optical Flares with Supernova Luminosities.

NATURE(2023)

Cited 3|Views58
No score
Abstract
In recent years, certain luminous extragalactic optical transients have been observed to last only a few days 1 . Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks 2 . Some short-duration transients, most notably AT2018cow (ref. 3 ), show blue optical colours and bright radio and X-ray emission 4 . Several AT2018cow-like transients have shown hints of a long-lived embedded energy source 5 , such as X-ray variability 6 , 7 , prolonged ultraviolet emission 8 , a tentative X-ray quasiperiodic oscillation 9 , 10 and large energies coupled to fast (but subrelativistic) radio-emitting ejecta 11 , 12 . Here we report observations of minutes-duration optical flares in the aftermath of an AT2018cow-like transient, AT2022tsd (the ‘Tasmanian Devil’). The flares occur over a period of months, are highly energetic and are probably nonthermal, implying that they arise from a near-relativistic outflow or jet. Our observations confirm that, in some AT2018cow-like transients, the embedded energy source is a compact object, either a magnetar or an accreting black hole.
More
Translated text
Key words
Astrophysical Flashes,Type Ia Supernovae,Supernovae,Pulsar Timing,Stellar Astrophysics
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined