SN_1895B

SN 1895B

SN 1895B

Supernova in the constellation Centaurus

Not to be confused with the star HD 119921 with a Bayer designation of "z Centauri".

SN 1895B was a supernova event in the irregular dwarf galaxy NGC 5253, positioned 16″ east and 23″ north of the galactic center.[1] It is among the closest known extragalactic supernova events.[4] The supernova was discovered by Williamina Fleming on December 12, 1895 after noticing an unusual spectrum on a photographic plate taken July 18, 1895, and was initially given the variable star designation Z Centauri.[2][6] The light curve is consistent with an event that began ~15 days before the discovery plate was taken,[4] and this indicates the supernova reached a peak visual magnitude of up to 8.49±0.03.[2]

A light curve for Z Centauri, adapted from Leibundgut et al. (1991)[7]
Quick Facts Event type, Date ...

After the light faded, the remnant has remained undetected at any wavelength,[4] including X-ray and radio.[2] This suggests the expanding remnant is meeting a low density of surrounding interstellar material, which would be consistent with certain double white dwarf merger scenarios. The remnant is expected to reach peak radio emission around the year 2195, and it may become detectable at that time.[4]

References

  1. [1]
    Barbon, R.; Buondi, V.; Cappellaro, E.; Turatto, M. (2008). Asiago Supernova Catalogue. Bibcode:2008yCat....1.2024B. {{cite book}}: |work= ignored (help)
  2. [2]
    Schaefer, Bradley E. (July 1995). "The Peak Brightness of SN 1895B in NGC 5253 and the Hubble Constant". Astrophysical Journal Letters. 447: L13. Bibcode:1995ApJ...447L..13S. doi:10.1086/309549. S2CID 227285055.
  3. [3]
    Freedman, Wendy L.; et al. (May 2001). "Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant". The Astrophysical Journal. 553 (1): 47–72. arXiv:astro-ph/0012376. Bibcode:2001ApJ...553...47F. doi:10.1086/320638. S2CID 42100478.
  4. [4]
    Cendes, Y.; et al. (May 2020). "Thirty Years of Radio Observations of Type Ia SN 1972E and SN 1895B: Constraints on Circumstellar Shells". The Astrophysical Journal. 894 (1): 16. arXiv:2001.03558. Bibcode:2020ApJ...894...39C. doi:10.3847/1538-4357/ab6b2a. S2CID 210157144. 39.
  5. [5]
    "SN 1895B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-12-01.
  6. [6]
    "List of Supernovae". Central Bureau for Astronomical Telegrams. International Astronomical Union. Retrieved 22 September 2013.
  7. [7]
    Leibundgut, B.; Tammann, G. A.; Cadonau, R.; Cerrito, D. (September 1991). "Supernova studies. VII. an atlas of light curves of supernovae type I." Astronomy & Astrophysics Supplement Series. 89: 537–589. Bibcode:1991A&AS...89..537L. Retrieved 5 December 2021.
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