SN 2021afdx

Last updated
SN 2021afdx
Cartwheel Galaxy JWST NIRCam+MIRI Full Res.png
Image of the host Cartwheel Galaxy
Event type Supernova
Type IIb
Date Asteroid Terrestrial-impact Last Alert System
Instrument23 November 2021
Constellation Sculptor
Right ascension 00h 37m 41.1368s
Declination −33° 42′ 58.712″
Epoch J2000
Distance500 Mly
Host Cartwheel Galaxy
Progenitor type Yellow Supergiant [1]
[ edit on Wikidata]

SN 2021afdx is a Type IIb supernova that exploded in the Cartwheel Galaxy, a ring galaxy located approximately 500 million light-years away in the constellation Sculptor. Discovered on 23 November 2021 by the Asteroid Terrestrial-impact Last Alert System (ATLAS), it is one of the few supernovae observed in detail with both ground-based telescopes and the James Webb Space Telescope (JWST). The event is notable for revealing an infrared echo from pre-existing circumstellar dust, providing key insights into dust production and heating mechanisms in core-collapse supernovae. [2] [1] [3] [4] [5]

Observation

SN 2021afdx was later observed by JWST during its Early Release Observations of the Cartwheel Galaxy in approximately 200 days post-explosion. [5] [6]

Follow-up spectroscopy conducted by the extended Public ESO Spectroscopic Survey for Transient Objects (ePESSTO+) using the FLOYDS spectrograph at the Las Cumbres Observatory confirmed its classification as a Type IIb supernova. [7]

References

  1. 1 2 "VizieR J/ApJ/942/L18". cdsarc.cds.unistra.fr. Retrieved 2025-11-30.
  2. ↑ "Bright Supernovae - 2021". www.rochesterastronomy.org. Retrieved 2025-11-30.
  3. ↑ "The Stellar Circle of Life". Telescope Live. Retrieved 2025-11-30.
  4. ↑ "2021afdx | Transient Name Server". www.wis-tns.org. Retrieved 2025-11-30.
  5. 1 2 Hosseinzadeh, Griffin; Sand, David J.; Jencson, Jacob E.; Andrews, Jennifer E.; Shivaei, Irene; Bostroem, K. Azalee; Valenti, Stefano; Szalai, Tamás; Burke, Jamison; Howell, D. Andrew; McCully, Curtis; Newsome, Megan; Gonzalez, Estefania Padilla; Pellegrino, Craig; Terreran, Giacomo (2023-01-01). "JWST Imaging of the Cartwheel Galaxy Reveals Dust Associated with SN 2021afdx". The Astrophysical Journal Letters. 942 (1): L18. arXiv: 2210.06499 . Bibcode:2023ApJ...942L..18H. doi: 10.3847/2041-8213/aca64e . ISSN   2041-8205.
  6. ↑ Engesser, M.; Smith, K.; Chen, T.; Smartt, S.; Pierel, J.; Gomez, S.; Coelln, S. V.; Temim, T.; Fox, O.; Rest, A.; Strolger, L.; Goel, A.; Gezari, S.; Angulo, R.; Dalrymple, K. (August 2022). "Detection of SN 2021afdx in JWST images of the Cartwheel Galaxy". Transient Name Server AstroNote. 155: 1. Bibcode:2022TNSAN.155....1E.
  7. ↑ Lazaro, Enrico de (2022-03-07). "Astronomers Spot Type II Supernova in Cartwheel Galaxy | Sci.News". Sci.News: Breaking Science News. Retrieved 2025-11-30.
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