SN 2013fs

SN 2013fs
Spectral class IIP (was IIN )[1]
Date October 6, 2013
Constellation Pegasus
Right ascension 23h 19m 44.67s
Declination +10° 11′ 04.5″
Epoch J2000
Galactic coordinates 089.0254 -46.5583
Distance 160 Mly
Host NGC 7610
Progenitor Unknown
Progenitor type Red Supergiant[2]
Notable features Earliest detailed observations of a supernova ever made.

SN 2013fs is a supernova, located in the spiral galaxy NGC 7610, discovered by the Intermediate Palomar Transient Factory sky survey at Palomar Observatory in October 2013 (and originally named iPTF 13dqy).[3] It was discovered approximately three hours from explosion (first light) and was observed in ultraviolet and X-ray wavelengths, among others, within several hours.[2] Optical spectra were obtained beginning at six hours from explosion, making these the earliest such detailed observations ever made of a supernova.[2]

The star that produced SN 2013fs was a red supergiant with a mass 10 times the mass of our Sun, an effective temperature of 3,500 K, a radius 607[4] times the size of our sun, and no more than a few million years old when it exploded.[2] The star was surrounded by a relatively dense shell of gas shed by the star within the year before it exploded.[3] Radiation emitted by the supernova explosion illuminated this shell, which had a mass of approximately one-thousandth the mass of our sun, and its outer fringe was about 5 times the distance of Neptune from our sun.[2]

References

  1. ↑ "Bright Supernovae 2013". Rochester Astronomy. Retrieved 15 February 2017.
  2. 1 2 3 4 5 Perkins, Sid. "Exploding Star Yields its Secrets". Science. AAAS. Retrieved 15 February 2017.
  3. 1 2 Yaron, O.; Perley, D. A.; Gal-Yam, A.; Groh, J. H.; Horesh, A.; Ofek, E. O.; Kulkarni, S. R.; Sollerman, J.; Fransson, C.; Rubin, A.; Szabo, P.; Sapir, N.; Taddia, F.; Cenko, S. B.; Valenti, S.; Arcavi, I.; Howell, D. A.; Kasliwal, M. M.; Vreeswijk, P. M.; Khazov, D.; Fox, O. D.; Cao, Y.; Gnat, O.; Kelly, P. L.; Nugent, P. E.; Filippenko, A. V.; Laher, R. R.; Wozniak, P. R.; Lee, W. H.; et al. (2017). "Confined dense circumstellar material surrounding a regular type II supernova". Nature Physics. 13 (5): 510. arXiv:1701.02596. Bibcode:2017NatPh..13..510Y. doi:10.1038/nphys4025.
  4. ↑ Moriya, Takashi J; Yoon, Sung-Chul; Gräfener, Götz; Blinnikov, Sergei I (2017). "Immediate dense circumstellar environment of supernova progenitors caused by wind acceleration: Its effect on supernova light curves". Monthly Notices of the Royal Astronomical Society: Letters. 469: L108. arXiv:1703.03084. Bibcode:2017MNRAS.469L.108M. doi:10.1093/mnrasl/slx056.


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