Hong Kong researchers together with colleagues from Spain and France showed that the rapidly expanding nebula with an extremely hot star Wolf – Rayna in the center is suitable for all signs corresponds to SN 1181 – one of the brightest well-known supernovae. The article of scientists has been published in The Astrophysical Journal Letters.
Between February 4 and 6, 1181, Chinese and Japanese astronomers noticed in brightness comparable to Saturn Star, which remained noticeable for six months. They managed to fix its position on the sky, but the location of the remainder of one of the eight supernovae, which could be observed with the naked eye, remained unknown for more than 900 years.
Now astrophysics from the University of Hong Kong, together with colleagues from Spain and France, found that Outdoor amateur astronomers In 2013, the PA 30 nebula will expand with extremely high speed – 1,100 kilometers per second. It implies that about a thousand years ago an explosion occurred on the place of the nebula – which corresponds to the events of 1181. In the center of the nebula, astronomers discovered Wolf star – Rayna – representatives of the type of very massive and very bright stars – the factory name of the star Parker – turned out to be one of the hottest all over the Milky Way.
“The historical messages have a” guest star “between two Chinese constellations – Chuanzhe and Huagai. Parker’s star is well suited at position,” Albert Zestrae said.
It is assumed that the star residue and the nebula was formed in the collision of two white dwarfs, which led to a flash of a supernova subtype of the IAX – rather rare and relatively low-power phenomenon, low energy release at which the progenitor star is not completely destroyed.