Fireworks display from rare dying star is unlike anything astronomers have seen.
. That star had a surface temperature of roughly 200,000 kelvin, with a stellar wind travelling outward at 16,000 kilometres per second — roughly 5% of the speed of light. “Stars simply don’t have 16,000-kilometre-per-second winds,” Fesen says. Speeds of 4,000 kilometres per second aren’t unheard of, he says — but 16,000 is wild.
The Crab Nebula is a more standard example of a supernova remnant, in which a dying star ejects a chaotic web of gas and dust.The data they collected not only helped to confirm that Pa 30 is indeed what’s left of the supernova observed in 1181, but also yielded an image of the remnant unlike any other. It contains hundreds of fine filaments radiating outwards.
Anthony Piro, an astronomer at Carnegie Observatories in Pasadena, California, thinks these findings crystallize at least one path through which a type Iax can form. But it is different from the previously favoured scenario, in which a white dwarf siphons material from a companion.
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