SN 2023ixf

SN 2023ixf
Supernova 2023ixf as seen on 20 May 2023
Supernova
Datec. 21 million years ago
(detected 19 May 2023, 17:27 UTC by Kōichi Itagaki)[1]
ConstellationUrsa Major
Right ascension14h 03m 38.6s[2]
Declination+54° 18′ 42.1″[2]
EpochJ2000
Distancec. 21 million ly[2]
HostPinwheel Galaxy[3]
ProgenitorSupergiant (M=–4.66)[4]
Peak apparent magnitude10.8 (on 22 May 2023)[5][6]
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SN 2023ixf is a type II-L[7][8] (core collapse) supernova located in the Pinwheel Galaxy. It was first observed on 19 May 2023 by Kōichi Itagaki and immediately classified as a type II supernova.[2] Initial magnitude at discovery was 14.9.[2] After discovery, the Zwicky Transient Facility project found a precovery image of the supernova at magnitude 15.87 two days before discovery.[9] The supernova was about 21 million light-years from Earth and is expected to have left behind either a neutron star or black hole, based on current stellar evolution models.

The supernova is located near a prominent HII region, NGC 5461, in an outer spiral arm of the bright galaxy.[3]

By 22 May 2023, SN 2023ixf had brightened to about magnitude 11.[5][6] It could be seen in telescopes as small as 114 mm (4.5 in)[3] and remained visible with backyard telescopes for several months.[10] The supernova started to fade around 10 June 2023.[11]

The last supernova that close to Earth occurred 9 years previously: SN 2014J in Messier 82, roughly 12 million light-years from Earth.

Recently observed supernovae as bright as SN 2023ixf
Supernova Galaxy Distance Type Peak
apmag
SN 2023ixf Pinwheel Galaxy (M101) 21 Mly (6.4 Mpc) II 10.8
SN 2014J M82 (Cigar Galaxy) 12 Mly (3.7 Mpc) Ia 10.1[12]
SN 2011fe Pinwheel Galaxy (M101) 21 Mly (6.4 Mpc) Ia 9.9[13]

Before becoming a supernova, the progenitor star is believed to have been a supergiant with an absolute magnitude in the near-infrared (814nm) of MF814W = –4.66.[4]

  1. ^ Cite error: The named reference announcement was invoked but never defined (see the help page).
  2. ^ a b c d e "AstroNote 2023-119". Transient Name Server. Archived from the original on 2023-05-20. Retrieved 2023-05-20.
  3. ^ a b c Cite error: The named reference S&T20230522 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference progenitor was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference bishop was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference LCO was invoked but never defined (see the help page).
  7. ^ G., Bianciardi; M., Ciccarelli A.; G., Conzo; M., D'Angelo; S., Ghia; M., Moriconi; Z., Orbanić; N., Ruocco; I., Sharp; M., Uhlár; F, Walter (2023). "Multiband Photometry Evolution in the First Weeks of SN 2023ixf, a possible II-L Subtype Supernova". Transient Name Server Astronote. 213: 1. arXiv:2307.05612. Bibcode:2023TNSAN.213....1B.
  8. ^ "VSX : Detail for SN 2023ixf". www.aavso.org. Retrieved 2023-07-31.
  9. ^ "ZTF Pre-Discovery Forced Photometry of SN 2023ixf". Transient Name Server.
  10. ^ Cite error: The named reference Earthsky20230520 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference AAVSO was invoked but never defined (see the help page).
  12. ^ List of supernovae sorted by Magnitude for 2014 Archived 2023-05-30 at the Wayback Machine (David Bishop)
  13. ^ List of supernovae sorted by Magnitude for 2011 Archived 2023-05-30 at the Wayback Machine (David Bishop)