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Astronomers unravel the 900-year-old cosmic mystery surrounding the famous Chinese supernova of 1181AD

Figure 1. (a) WISE false color image of Pa 30. Blue and green represent 11 μm emission and red represents 22 μm. Here, the level of the 22 μm component is adjusted to enhance the ring-shaped function. (B) In this false color image, green represents WISE 11 μm (as shown in the left panel), red represents WISE 22 μm (adjusted to indicate extended emission), and emission from the central star is highlighted by blue from GALEX. The XMM-Newton contour (10 levels, linear scale) that appears shows that most of the X-ray radiation originates from the core of the nebula. In the XMM-Newton contour map, a point light source in the background is displayed on the west side of CS. (C) 2.1 m KPNO [O iii] Image rebinned stacking from individual frames to enhance low surface brightness, diffusion shell. The green cross in the center of the image indicates the location of the CS. Panels (a)-(c) are reproduced with the same angular scale and orientation. For a Pa30 Gaia distance of 2.30 ± 0.14 kpc, a 45-inch angular scale is equivalent to approximately 100,000 au.

According to an international team of astronomers, the 900-year-old cosmic mystery surrounding the origin of the famous supernova first discovered in China in 1181AD has finally been solved.

According to a new study published today (September 15, 2021), a faint, rapidly expanding cloud (or nebula) called Pa30 Milky WayKnown as Parker’s Star, it fits the profile, location, and age of historic supernovae.

In the past millennium (since 1006), the Milky Way had only five bright supernovae. Of these, the Chinese supernova, also known as the “Chinese Guest Star” of 1181AD, remains a mystery.It was originally seen and documented by Chinese and Japanese astronomers in 2012.NS A century that was as bright as a planet Saturn And it remained visible for 6 months. They also recorded the approximate location of the sightings in the sky, but the confirmed debris of the explosion has not even been confirmed by modern astronomers. The other four supernovae are all well-known in modern science and include the famous Nebula.

These 12 sourcesNS The explosion of the century remained a mystery until this latest discovery made by a team of international astronomers from Hong Kong, Britain, Spain, Hungary and France, including Professor Albert Gilstra of the University of Manchester. In a new treatise, astronomers found that the Pa 30 nebula is expanding at an extreme rate of over 1,100 km / s (at this rate, it only takes five minutes to travel from Earth to the Moon. ). They use this speed to derive an age of about 1,000 years. This matches the event in 1181AD.

Professor Zijlstra, a professor of astrophysics at the University of Manchester, explains: Parker’s stars fit well in that position. This means that both age and location are adapted to the events of 1181. “

Pa30 and Parker’s Star were previously proposed as a result of the merger of the two white dwarfs. Such events are thought to lead to a rare and relatively faint type of supernova called the “Iax supernova”.

Professor Zijlstra said: “Only about 10% of supernovae are of this type and are not well understood. The fact that SN 1181 was faint but faded very slowly fits this type. This fits us. Is the only such event where can study both the remaining nebulae and fused stars, and can also have an explanation for the explosion itself. “

The fusion of the remaining stars, white dwarfs, and neutron stars causes extreme nuclear reactions, forming heavy, neutron-rich elements such as gold and platinum. Professor Zijlstra said: “A combination of all this information, such as age, location, event brightness, and previously recorded 185-day period, shows that Parker’s Star and Pa30 correspond to SN 1181. The only type Iax supernova made. It could be the remaining stars and nebula. It’s great to be able to solve both historical and astronomical mysteries. “

See also: Andreas Ritter, Quentin A. Parker, Fotoini Lykou, Albert A. Zijlstra, Martín A. Guerrero, Pascal LeDu, “The Wreckage and Origin of the Historical Supernova 1181AD,” September 15, 2021 Astrophysical Journal..
DOI: 10.3847 / 2041-8213 / ac2253

Astronomers unravel the 900-year-old cosmic mystery surrounding the famous Chinese supernova of 1181AD Astronomers unravel the 900-year-old cosmic mystery surrounding the famous Chinese supernova of 1181AD

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