Astronomy:SN 2021afdx
 Image of the host Cartwheel Galaxy | |
| Event type | Supernova |
|---|---|
| Spectral class | Type IIb |
| Date | Asteroid Terrestrial-impact Last Alert System |
| Instrument | 23 November 2021 |
| Constellation | Sculptor |
| Right ascension | 00h 37m 41.1368s |
| Declination | −33° 42′ 58.712″ |
| Epoch | J2000 |
| Distance | 500 Mly |
| Host | Cartwheel Galaxy |
| Progenitor type | Yellow Supergiant[1] |
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
- ↑ 1.0 1.1 "VizieR J/ApJ/942/L18" (in en). https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/942/L18.
- ↑ "Bright Supernovae - 2021.". https://www.rochesterastronomy.org/sn2021/index.html.
- ↑ "The Stellar Circle of Life" (in en). https://telescope.live/blog/stellar-circle-life.
- ↑ "2021afdx | Transient Name Server". https://www.wis-tns.org/object/2021afdx.
- ↑ 5.0 5.1 Hosseinzadeh, Griffin; Sand, David J.; Jencson, Jacob E.; Andrews, Jennifer E.; Shivaei, Irene; Bostroem, K. Azalee; Valenti, Stefano; Szalai, Tamás et al. (2023-01-01). "JWST Imaging of the Cartwheel Galaxy Reveals Dust Associated with SN 2021afdx". The Astrophysical Journal Letters 942 (1): L18. doi:10.3847/2041-8213/aca64e. ISSN 2041-8205. Bibcode: 2023ApJ...942L..18H.
- ↑ Engesser, M.; Smith, K.; Chen, T.; Smartt, S.; Pierel, J.; Gomez, S.; Coelln, S. V.; Temim, T. et al. (August 2022). "Detection of SN 2021afdx in JWST images of the Cartwheel Galaxy" (in en). Transient Name Server AstroNote 155: 1. Bibcode: 2022TNSAN.155....1E. https://ui.adsabs.harvard.edu/abs/2022TNSAN.155....1E/abstract.
- ↑ Lazaro, Enrico de (2022-03-07). "Astronomers Spot Type II Supernova in Cartwheel Galaxy | Sci.News" (in en-US). https://www.sci.news/astronomy/cartwheel-galaxy-sn-2021afdx-10599.html.
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