Astronomy:SN 2020tlf
 Light curves for SN 2020tlf in four photometric bands, plotted from data published by Jacobson-Galán et al. (2022)[1] | |
| Event type | Type IIn |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 40m 10.03s[1] |
| Declination | 42° 46′ 39.45″[1] |
| Epoch | J2000 |
| Distance | 36.8±1.29 million pc[1] |
| Redshift | 0.008463±0.0003[1] |
| Host | NGC 5731 |
| Progenitor type | Red supergiant |
| Peak apparent magnitude | 15.89[1] |
SN 2020tlf was a Type II supernova that occurred 120 million light years away in the galaxy NGC 5731. The supernova marked the first time that a red supergiant star had been observed before, during, and after the event,[2][1] being observed up to 130 days before.[2] The progenitor star was between 10 and 12 solar masses.
Observations
The star was first observed by the Pan-STARRS telescope in the summer of 2020, with other telescopes such as ATLAS also observing it. It was initially believed that red supergiants were quiet before their demise; however, SN 2020tlf was observed emitting bright, intense radiation and ejecting massive amounts of gaseous material.[3]<ref>Specktor, Brandon (January 11, 2022). "Scientists watched a star explode in real time for the first time ever". Live Science. https://www.livescience.com/first-supernova-real-time-observations. Retrieved February 14, 2022.{{cbignore} rvations were also made throughout the electromagnetic spectrum, such as in the X-ray, ultraviolet, infrared and radio wave spectrums.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Jacobson-Galán, W. V.; Dessart, L.; Jones, D. O.; Margutti, R.; Coppejans, D. L.; Dimitriadis, G.; Foley, R. J.; Kilpatrick, C. D. et al. (January 6, 2022). "Final Moments. I. Precursor Emission, Envelope Inflation, and Enhanced Mass Loss Preceding the Luminous Type II Supernova 2020tlf". The Astrophysical Journal 924 (1): 15. doi:10.3847/1538-4357/ac3f3a. Bibcode: 2022ApJ...924...15J.
- ↑ 2.0 2.1 Gough, Evan (February 7, 2022). "Astronomers Watch a Star Die and Then Explode as a Supernova – For the Very First Time". SciTechDaily. https://scitechdaily.com/astronomers-watch-a-star-die-and-then-explode-as-a-supernova-for-the-very-first-time/. Retrieved February 14, 2022.
- ↑ Anderson, Paul (January 14, 2022). "Dying star's explosive end seen by astronomers". EarthSky. https://earthsky.org/space/dying-stars-explosive-end-supernova-sn-2020tlf/. Retrieved February 14, 2022.
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