Astronomy:SN 2023ixf
 Supernova 2023ixf as seen on 20 May 2023 05:58 UT | |
| Spectral class | Type II-L supernova (single massive star) |
|---|---|
| Date | 19 May 2023 17:27[1] |
| Constellation | Ursa Major |
| Right ascension | 14h 03m 38.6s[2] |
| Declination | +54° 18′ 42.1″[2] |
| Epoch | J2000 |
| Distance | 21 Mly (6.4 Mpc)[2] |
| Host | Pinwheel Galaxy (M101) NGC 5461[3] |
| Progenitor | Supergiant (M=–4.66)[4] |
| Peak apparent magnitude | 10.8 (on 22 May 2023)[5][6] |
SN 2023ixf is a type II-L[7][8] (core collapse) supernova located in the Pinwheel Galaxy (M101). 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 is 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 can be seen in telescopes as small as 114 mm (4.5 in)[3] and should remain visually visible with backyard telescopes for a few months.[10] The last supernova this close to Earth was SN 2014J in Messier 82, roughly 12 million light-years from Earth. The supernova started to fade on around 10 June 2023.[11]
| 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]
References
- ↑ "Discovery certificate for object 2023ixf". Transient Name Server. https://www.wis-tns.org/object/2023ixf/discovery-cert.
- ↑ 2.0 2.1 2.2 2.3 2.4 "AstroNote 2023-119". Transient Name Server. https://www.wis-tns.org/astronotes/astronote/2023-119.
- ↑ 3.0 3.1 3.2 Bob King (2023-05-22). "Bright Supernova Blazes in M101, the Pinwheel Galaxy". Sky & Telescope. https://skyandtelescope.org/astronomy-news/bright-supernova-blazes-in-m101-the-pinwheel-galaxy/. Retrieved 2023-05-23.
- ↑ 4.0 4.1 "Detection of candidate progenitor of SN 2023ixf in HST archival data". Astronomer's Telegram. 2023-05-23. https://www.astronomerstelegram.org/?read=16050.
- ↑ 5.0 5.1 David Bishop. "2023ixf (ZTF23aaklqou)". https://www.rochesterastronomy.org/supernova.html#2023ixf. Retrieved 2023-05-22.
- ↑ 6.0 6.1 "2023-141: Amateur Follow-up observations in bands V & B". Transient Name Server. https://www.wis-tns.org/astronotes/astronote/2023-141.
- ↑ G., Bianciardi; M., Ciccarelli A.; G., Conzo; M., D'Angelo; S., Ghia; M., Moriconi; Z., Orbanić; N., Ruocco et al. (2023). "Multiband Photometry Evolution in the First Weeks of SN 2023ixf, a possible II-L Subtype Supernova". Transient Name Server Astronote 213: 1. Bibcode: 2023TNSAN.213....1B.
- ↑ "VSX : Detail for SN 2023ixf". https://www.aavso.org/vsx/index.php?view=detail.top&oid=2387467.
- ↑ "ZTF Pre-Discovery Forced Photometry of SN 2023ixf". Transient Name Server. https://www.wis-tns.org/astronotes/astronote/2023-120.
- ↑ Kelly Kizer Whitt (2023-05-20). "New supernova! Closest in a decade". Earthsky. https://earthsky.org/todays-image/supernova-in-m101-pinwheel-galaxy-closest-in-a-decade-how-to-see/. Retrieved 2023-05-21.
- ↑ "AAVSO Magnitude Plot". AAVSO. https://www.aavso.org/LCGv2/index.htm?DateFormat=Calendar&RequestedBands=&view=api.delim&ident=000-BPQ-019&fromjd=2459988.920458&tojd=2460188.920458&delimiter=@@@.
- ↑ List of supernovae sorted by Magnitude for 2014 (David Bishop)
- ↑ List of supernovae sorted by Magnitude for 2011 (David Bishop)
External links
- Supernova Discovered in Nearby Spiral Galaxy M101, Astronomy Picture of the Day (NASA)
- AAVSO: magnitude plot
 |  |
