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The Hypervelocity Star sailed out of the Milky Way may have an unusual origin



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The stars are heavy. Heavy things need more energy to move. Therefore, when accelerating the solar mass to approximately 568 km / s (or 353 miles / s), mix. Scientists generally believed that some of the hypervelocity stars we found – the term meaning stars moving much faster than the typical "background" speed in the Milky Way galaxy – was pushed into the galaxy's void between shooter A *, a super-black black hole in our galaxy's center. Approximately 60 million kilometers in diameter, shooter A * is really a good thing (gravitationally).

But at least one star, Sagittarius A * is not a culprit. LAMOST-HVS-1, a star with a mass of 8.3 suns, was removed from the Bird Trail's inner disc about 33 million years ago and the speed was 551-587 km / s. It's much faster than most stars – for example, the Sun is moving at a speed of ~ 220 km / s, or less than half the speed of LAMOST-HVS-1. It is believed that a star can gain such a speed in two ways: either it was part of a binary pair and survived its partner's supernova, or involved in complex gravitational interactions between several bodies as part of a star cluster. 19659004]  LAMOST-HVS-1

Supernova displacement is simpler – at least as much as anything that involves the explosive mass of a star can be described as simple. a few stars or different LAMOST-HVS-1 configuration of stars and black holes is that, although we thought this star was sailed from Sagittarius A *, it seems that it comes from the Spiral Hand of the Milky Way Norma. However, there are no known massive star groups in this field that would really create high speeds.

And history becomes unfamiliar. LAMOST-HVS-1 is not just a hipervelocity star, is a huge hipervelocity star that is no longer associated with the Bird Path. The estimated weight is about eight times higher than the Sun, so an incredible amount of energy would be taken to throw the star out of the spiral arm of Norma.

"This discovery is changing our approach to the rapidly changing origins of stars," said Monica Valluri, Professor of Astronomy at the University of Michigan. "The fact that the trajectory of this massive, fast-moving star appears on the disk rather than in the center of the galaxy indicates that the extremely extreme environment required to expel the fast moving stars can occur elsewhere than the supermassive black holes. 19659004] The team does not yet have a model to accurately determine how gravitational interaction in the LAMOST-HVS-1 front yard could initially displace the galaxy void, but hopes that future research will lead to more data from the star. It is a sign that gravitational interaction around the stars can cause unusual effects that we thought could only be caused by superhuman black holes. [19659012]