Astronomy:SN 2021hpr

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Short description: Supernova from a binary star system
SN 2021hpr
Spiral galaxy NGC 3147 is the host galaxy
Event typeSN Ia
DateApril 2, 2021
ConstellationDraco
Right ascension 10h 16m 38.620s[1]
Declination+73° 24′ 01.80″[1]
EpochJ2000
Distance45 Mpc
HostNGC 3147
ProgenitorBinary star
Peak apparent magnitude13.8[2]
[edit on Wikidata]

SN 2021hpr was a type Ia supernova located in the Constellation of Draco that occurred in the spiral galaxy NGC 3147 at a distance of about 45 Mpc.[3] Its discovery was reported by amateur astronomer Kōichi Itagaki on April 2, 2021.[4] The progenitor of this supernova was likely a star in a binary star system with a separation of ~15.84 AU.[5]

A light curve for SN 2021hpr showing the visual (v band) and near-infrared (i band) brightness, adapted from Barna et al. (2023)[6]

The expanding fireball produced by this supernova was homogeneous. This is likely due to the supernova ejecta interacting with its companion object and the surrounding circumstellar medium (CSM). The circumstellar medium was metal rich.[5][7]

References

  1. ↑ 1.0 1.1 "SN 2021hpr". IAU. https://www.wis-tns.org/object/2021hpr. 
  2. ↑ Bishop, David. "Bright Supernovae - SN 2021hpr". https://www.rochesterastronomy.org/sn2021/sn2021hpr.html. 
  3. ↑ Lim, Gu; Im, Myungshin; Paek, Gregory S. H.; Yoon, Sung-Chul; Choi, Changsu; Kim, Sophia; Wheeler, J. Craig; Thomas, Benjamin P. et al. (May 2023). "The Early Light Curve of the Type Ia Supernova 2021hpr in NGC 3147: Progenitor Constraints with the Companion Interaction Model" (in en). The Astrophysical Journal 949 (1): 33. doi:10.3847/1538-4357/acc10c. ISSN 0004-637X. Bibcode: 2023ApJ...949...33L. 
  4. ↑ Itagaki, K. (April 2021). "Transient Discovery Report for 2021-04-02". Transient Name Server Discovery Report (2021–998). https://www.wis-tns.org/object/2021hpr/discovery-cert. Retrieved 16 May 2025. 
  5. ↑ 5.0 5.1 Iskandar, Abdusamatjan; Wang, Xiaofeng; Esamdin, Ali; Zeng, Xiangyun; Pellegrino, Craig; Yan, Shengyu; Liu, Jialian; Filippenko, Alexei V. et al. (2025-05-08). "SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase" (in en). The Astrophysical Journal 984 (2): 160. doi:10.3847/1538-4357/adb3a4. ISSN 0004-637X. Bibcode: 2025ApJ...984..160I. 
  6. ↑ Barna, B.; Nagy, A. P.; Bora, Zs.; Czavalinga, D. R.; Könyves-Tóth, R.; Szalai, T.; Székely, P.; Zsíros, Sz. et al. (September 2023). "Three is the magic number: Distance measurement of NGC 3147 using SN 2021hpr and its siblings". Astronomy & Astrophysics 677: A183. doi:10.1051/0004-6361/202346395. Bibcode: 2023A&A...677A.183B. https://www.aanda.org/articles/aa/pdf/2023/09/aa46395-23.pdf. Retrieved 16 May 2025. 
  7. ↑ Zhang, Yu; Zhang, Tianmeng; Danzengluobu; Li, Zhitong; Zhao, Pinsong; Zhang, Bingqing; Du, Lin; Zhu, Yinan et al. (2022-07-01). "Optical Observations of the Nearby Type Ia Supernova 2021hpr". Publications of the Astronomical Society of the Pacific 134 (1037): 074201. doi:10.1088/1538-3873/ac7583. ISSN 0004-6280. Bibcode: 2022PASP..134g4201Z. https://validate.perfdrive.com/9730847aceed30627ebd520e46ee70b2/?ssa=15a1a96e-beff-48d7-89e3-76b43548b279&ssb=07946211490&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1088%2F1538-3873%2Fac7583&ssi=953dc06a-cnvj-4a8c-a69a-a560bd75fd5c&ssk=botmanager_support@radware.com&ssm=43555782408374349106072354080510&ssn=47e6173043c1a1bad978a2d3d6d0ea42256fb246c587-2fb4-42d8-a4d8e4&sso=41a8b209-c9dc2461ec1c1481ccf31db84fe434fe1337477f22289a4b&ssp=51464078881747363514174735974912179&ssq=66842623907668017175439076829284746591350&ssr=MjA4LjgwLjE1My4xMDk=&ssu=&ssv=&ssw=&ssx=eyJfX3V6bWYiOiI3ZjYwMDBhNWVmNTVkMi1lMDQ1LTQwN2ItODZmZC1kYjE1MmEyNjJkZDQxNzQ3MzM5MDc2ODQxMC0zZTY3YjM3ZTQzMDNiY2M1MTAiLCJ1em14IjoiN2Y5MDAwZGJkNzZmZDgtMjE0OC00ZWMxLTgwNjItYzVhYjJkMzZiYzE0MS0xNzQ3MzM5MDc2ODQxMC05ZDc0YTE2ZjBjNWMwMWJkMTAiLCJyZCI6ImlvcC5vcmcifQ==. 



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