SN 386
| Supernova SN 386 | |
|---|---|
| Observation data | |
| Supernova type | Type II |
| Remnant type | Shell |
| Host galaxy | Milky Way |
| Constellation | Sagittarius |
| Right ascension | 18h 11.5m[1] |
| Declination | −19° 25′[1] |
| Discovery date | April/May 386 |
| Other SNe | |
| Preceded by | SN 185 |
| Succeeded by | SN 393 |
SN 386 refers to an AD 386 transient astronomical event that was likely a Type II supernova. Supernova remnant G11.2-0.3, a circularly symmetric supernova remnant observed in modern times in the constellation Sagittarius, is likely from SN 386.[2][3] The distance was estimated to be about 16,000 light years away from Earth.
G11.2-0.3 consists of a spherical shell, contains a dense, rotating dead star at its center. It is believed to be formed from the central 65ms X-ray pulsar and pulsar wind nebula (PWN).[4] According to Chandra, the radio data is consistent with association of the supernova remnant with the "guest star" reported by Chinese astronomers nearly 2,000 years ago. The pulsar at nearly the very center of G11.2-0.3 also supports the idea that this debris field could have been created around the time of the Chinese observations.[5]
References
- 1 2 Galactic SNRs: Detailed Listings
- ↑ Clark, D. H.; Stephenson, F. R. (1976). "Which Historical New Stars were Supernovae?" (PDF). Q. J. R. Astron. Soc. 17: 290. Bibcode:1976QJRAS..17..290C.
The position of the star AD 386 corresponds very well with that of the SNR G11.2–0.3, and this leads us to make the tentative suggestion that this source is the remnant of the star.
- ↑ Kaspi, V. M.; Roberts, M. E.; Vasisht, G.; Gotthelf, E. V.; Pivovaroff, M.; Kaawai, N. (10 October 2001). "Chandra X-Ray Observations of G11.2–0.3: Implications for Pulsar Ages". The Astrophysical Journal 560: 372. arXiv:astro-ph/0107292. Bibcode:2001ApJ...560..371K. doi:10.1086/322515.
The supernova remnant G11.2–0.3 has received considerable observational attention because of the possibility that it is associated with a 'guest star' witnessed by Chinese astronomers in the year A.D. 386 (Clark & Stephenson 1977).
- ↑ Roberts, Mallory (April 2002). G11.2-0.3 the Remnant of SN 386 AD: Is it too good to be true?. Albuquerque, New Mexico: American Physical Society/American Astronomical Society.
- ↑ NASA/CXC/Eureka Scientific/M.Roberts et al, A Textbook Supernova Remnant