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SN 185

Possible supernova event located in Centaurus-Circinus

Field	Value
name	Supernova SN 185
image	Image:RCW 86.jpg
caption	Infrared images from NASA's Spitzer Space Telescope and WISE are combined with X-ray data from the Chandra X-ray Observatory and ESA's XMM-Newton Observatory in this image of RCW 86.
epoch	J2000
type	Type Ia?
SNRtype	Shell
host	Milky Way
constellation	Circinus and Centaurus
ra
dec
gal	G315.4−2.3
discovery	7 December 185
mag_v	"as much as −8"
distance	2800 parsec
predecessor	None known
successor	SN 386
notes	Ancient records of SN 185 may be the earliest written description of a supernova.

SN 185 was a transient astronomical event observed in the year AD 185, likely a supernova. The transient occurred in the direction of Alpha Centauri, between the constellations Circinus and Centaurus, centered at RA Dec , in Circinus. This "guest star" was observed by Chinese astronomers in the Book of Later Han (後漢書),{{Cite journal |doi-access=free

History

The Book of Later Han gives the following description:

In the 2nd year of the epoch Zhongping [中平], the 10th month, on the day Guihai [癸亥] [December 7, Year 185], a 'guest star' appeared in the middle of the Southern Gate [南門] an asterism consisting of [ε Centauri and α Centauri], The size was half a bamboo mat. It displayed various colors, both pleasing and otherwise. It gradually lessened. In the 6th month of the succeeding year it disappeared.

The gaseous shell RCW 86 is probably the supernova remnant of this event and has a relatively large angular size of roughly 45 arc minutes |access-date=2006-05-24}}

Infrared observations from NASA's Spitzer Space Telescope and Wide-field Infrared Survey Explorer (WISE) reveal how the supernova occurred and how its shattered remains ultimately spread out to great distances. The findings show that the stellar explosion took place in a hollowed-out cavity, allowing material expelled by the star to travel much faster and farther than it would have otherwise. |access-date=2011-10-25 |archive-date=2019-06-17 |archive-url=https://web.archive.org/web/20190617105712/https://www.nasa.gov/mission_pages/spitzer/news/spitzer20111024.html |url-status=dead

Differing modern interpretations of the Chinese records of the guest star have led to quite different suggestions for the astronomical mechanism behind the event, from a core-collapse supernova to a distant, slow-moving comet{{cite journal |url-access=subscription

Gallery

File:Iotw2236a - RCW 86.jpg||alt=The SMARTS 0.9-meter Telescope has captured an echo of the past in this image. RCW 86 is a literal shell of its former self, the gaseous remnant of a supernova.

References

Ye, Fan. "Book of the Later Han".
《後漢書·卷十二·天文下》："中平二年十月癸亥，客星出南門中，大如半筵，五色喜怒稍小，至後年六月消。占曰：‘為兵。’至六年，司隸校尉袁紹誅滅中官，大將軍部曲將吳匡攻殺車騎將軍何苗，死者數千人。"
"Dynastic Vibes".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

185 centaurus circinus supernova-remnants supernovae astronomical-objects-known-since-antiquity historical-supernovae

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