The nebula does not move slowly in the much -studied supernova Cassiopeia A. This was observed by astronomers from the University of Amsterdam and Harvard. The astrologers thought the rest had collided with something. Their information is made available for dissemination The Astrophysical Newspaper.
Cassiopeia The remnant of the constellation in the constellation Cassiopeia is about 11,000 light -years away from us. The first explosion on Earth needed light around 1670. However, there was so much gas and dust around the star that the explosion could be seen with the naked eye. or with standard telescopes. The Cassiopeia A nebula explosion is expanding at an average of 4,000 to 6,000 kilometers per second and has a temperature of about 30 million degrees Celsius. This may be an increase in the amount of gas burned by a star before it explodes. Cassiopeia A is about 16 years old.
19 years of data
The researchers, led by Jacco Vink (University of Amsterdam, Netherlands) analyzed 19 years of data from the Chandra X-ray Observatory. This is an American X-ray satellite with Dutch spectrometers orbiting the Earth in a high elliptic orbit.
Scientists in the western part of Cassiopeia A have found that the interior of the explosive nebula is not expanding, but is moving inward. The researchers also took measurements of the speed or deceleration of the external vibration wave. This external shaking wave changed speed to the west rather than slowing down as expected.
“Moving back west is two things,” says Jacco Vink. “Or if there’s a hole somewhere, a kind of vacuum, in a supernova, the heat wave will move quickly into space. From the observations of Vink and his colleagues, a group can be seen. Computer systems think that after a pounding, the vibration will be less fast and then faster. “As we measured,” said Vink.
The model was re -investigated by an Italian company partnered with Vink. They thought the shaking wave hit with a pile of gases. This shell was formed when a star that had not been blown away by various gases had blown away at the end of its life.
No contact was made between Vink and the Italians. The Italian team made the first results announced by Vink at a conference in 2019. “When we saw a speed bump and they predicted in their models, the puzzle pieces fell apart. , “said Vink.
Cassiopeia A is very popular these days. For example, NASA’s new X-ray satellite released its first image of the explosive star on Valentine’s Day. And the James Webb Space Telescope will turn its infrared eye on supernova remnants later this year.
NASA’s IXPE sends the first scientific image
Jacco Vink, Daniel J. Patnaude & Daniel Castro, The forward and revolutionary movement of Cassiopeia A. arXiv: 2201.08911v2 [astro-ph.HE], arxiv.org/abs/2201.08911. Approved for publication on The Astrophysical Newspaper
Presented by the Netherlands Research School for Astronomy
Directions: No similar expansion of Cassiopeia A (2022, March 28) Retrieved 28 March 2022 from https://phys.org/news/2022-03-ejection-nebula-supernova-cassiopeia-evenly.html
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