ASASSN-19bt

ASASSN-19bt

Object type	Tidal disruption event
Observation data (Epoch J2000)
Constellation	Volans
Right ascension	07h 00m 11.546s [1]
Declination	−66° 02′ 24.14″ [1]
Redshift	0.0262

ASASSN-19bt was a tidal disruption event (TDE) known for being the first such event discovered. It was discovered by the All Sky Automated Survey for SuperNovae (ASAS-SN) project, with early-time, detailed observations by the TESS satellite. It was first detected on January 21, 2019, and reached peak brightness on March 4. ^{[2] [3] [4]}

The black hole which caused the TDE has a mass of around 6 million suns and is in the 16th magnitude galaxy 2MASX J07001137-6602251 in the constellation Volans at a redshift of 0.0262, around 375 million light years away. ^{[2] [5]}

Observations in UV light made with NASA's Neil Gehrels Swift Observatory showed a drop in the temperature of the tidal disruption from around 71,500 to 35,500 degrees Fahrenheit (40,000 to 20,000 degrees Celsius) over a few days. This is the first time such an early temperature drop has been seen in a tidal disruption event. ^[3] The transient resulting from the tidal disruption event has been cataloged as AT 2019ahk. ^[1]

References

1. "AT 2019ahk". Transient Name Server.
2. Holoien, Thomas W.-S.; Vallely, Patrick J.; Auchettl, Katie; Stanek, K. Z.; Kochanek, Christopher S.; French, K. Decker; Prieto, Jose L.; Shappee, Benjamin J.; Brown, Jonathan S.; Fausnaugh, Michael M.; Dong, Subo; Thompson, Todd A.; Bose, Subhash; Neustadt, Jack M. M.; Cacella, P.; Brimacombe, J.; Kendurkar, Malhar R.; Beaton, Rachael L.; Boutsia, Konstantina; Chomiuk, Laura; Connor, Thomas; Morrell, Nidia; Newman, Andrew B.; Rudie, Gwen C.; Shishkovsky, Laura; Strader, Jay (2019). "Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS". The Astrophysical Journal. 883 (2): 111. arXiv: 1904.09293 . Bibcode:2019ApJ...883..111H. doi: 10.3847/1538-4357/ab3c66 . S2CID   128307681.
3. Garner, Rob (2019-09-25). "TESS Spots Its 1st Star-shredding Black Hole". NASA. Retrieved 2019-09-28.
4. "NASA's TESS Mission Spots Its 1st Star-shredding Black Hole - NASA". 2019-09-26. Retrieved 2025-04-14.
5. Kazmierczak, Scott Wiessinger and Jeanette (2019-09-26). "NASA Scientific Visualization Studio | TESS Catches Its First Star-destroying Black Hole". NASA Scientific Visualization Studio. Retrieved 2025-04-14.