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From Wikipedia, the free encyclopedia

AT2018hyz
Event typeTidal disruption event
ConstellationSextans
Right ascension10h 06m 50.871s
Declination+01° 34′ 34.08″[1]
Distance665 million light years (204 Mpc)[1]
Redshift0.04573[1]

AT2018hyz is a tidal disruption event (TDE) that was discovered in 2018 by the All Sky Automated Survey for SuperNovae (ASASS-SN).[1]

History

In 2022, astronomers announced the discovery of radio emission from AT2018hyz using the Very Large Array (VLA), MeerKAT, and the Australia Telescope Compact Array (ATCA), despite no radio emission detected earlier.[2] The emission is still rising rapidly, and has been interpreted as an outflow of material that was "burped" several years after the initial TDE from the accretion disk of the supermassive black hole, traveling at up to half the speed of light.[3] Alternately, it has been proposed that the delayed radio emission from AT2018hyz could be due to an off-axis astrophysical jet, which launched promptly when the black hole was consumed (similar to the TDE Swift J1644+57), and emission only became visible later when it entered our line of sight.[4]

See also

References

  1. ^ a b c d "AT 2018hyz | Transient Name Server". www.wis-tns.org.
  2. ^ Cendes, Y.; Berger, E.; Alexander, K. D.; Gomez, S.; Hajela, A.; Chornock, R.; Laskar, T.; Margutti, R.; Metzger, B.; Bietenholz, M. F.; Brethauer, D.; Wieringa, M. H. (1 October 2022). "A Mildly Relativistic Outflow Launched Two Years after Disruption in Tidal Disruption Event AT2018hyz". The Astrophysical Journal. 938 (1): 28. arXiv:2206.14297. Bibcode:2022ApJ...938...28C. doi:10.3847/1538-4357/ac88d0.
  3. ^ "'We've Never Seen Anything Like This Before:' Black Hole Spews Out Material Years After Shredding Star | Center for Astrophysics | Harvard & Smithsonian". www.cfa.harvard.edu. Retrieved 7 May 2024.
  4. ^ Matsumoto, Tatsuya; Piran, Tsvi (2 May 2023). "Generalized equipartition method from an arbitrary viewing angle". Monthly Notices of the Royal Astronomical Society. 522 (3): 4565–4576. arXiv:2211.10051. doi:10.1093/mnras/stad1269.
This page was last edited on 13 May 2024, at 04:35
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