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SN 386
SN 386 is a type II supernova exploded around year 369 AD. SNR G11.2-0.3, the circularly symmetric supernova remnant of SN 386 was observed nearby constellation Sagittarius. The distance was estimated to be about 16,000 light years away from Earth.
"In the third month, in the spring of the 11th year of Thai Ho reign period of Chin dynasty (24 March – 22 April 369AD), a guest star was seen in the Western Wall of the Purple Palace (Tzu Kung Hsi Yuan, or the intersection of Draco, Ursa Major and Lynx). In the 7th month, it disappeared (19 October – 17 September 369AD)."
Chin Sui, Thung Chi, Wen Hsien, Thung Khao (China)〔Xi Ze-xong and Bo Sh-ren (1965) ‘Ancient Novae and Supernovae Recorded in the Annals of China, Korea, and Japan and the their Significance in Radioastronomy’ Acta Astronomic& Sinica (NASA), Vol. 13, No. 1/〕
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).〔Roberts, Mallory, G11.2-0.3 the Remnant of SN 386 AD: Is it too good to be true?〕 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.〔NASA/CXC/Eureka Scientific/M.Roberts et al, A Textbook Supernova Remnant〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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