قالب وردپرس درنا توس
Home / Science / Celebrity star Betelgeuse is smaller and closer to us than we thought

Celebrity star Betelgeuse is smaller and closer to us than we thought



Betel nut. Betel nut. Betel nut.

ALMA (ESO / NAOJ / NRAO) / E. Ogman / P. Kevela

If you experience the creepy sensation of someone breathing under the neck, it may be Betelgeuse.Notorious star-an exciting subject Supernova discussion At the beginning of this year-may be closer to the earth than we thought.

Betel nut is a red super giant. Compared with the size of our sun, it is terrible. A study published this week in the Astrophysical Journal revealed some new methods for calculating the mass and distance of stars, and gave us an estimate of when a star might become a supernova.

Since the end of 201

9, the star has experienced some strange dimming and brightening events, and speculation surrounding the explosion of Betelgeuse has accelerated. Dust cloud caused one of these events. Lead author Meridith Joyce said in a statement from the Australian National University (ANU) on Friday: “We found that the second smaller event may have been caused by the pulsation of stars.”

The scientific team used modeling methods to classify the pulsations and traced them to what Liang Chengzhi, a co-author of the University of Tokyo, called “pressure waves-essentially sound waves. This activity helps researchers figure out the position of a star in its life cycle.

Scientists have previously estimated the size of Betelgeuse compared to our solar system, but new research has revised this estimate.

that

As a result, Betelgeuse will not be in danger of supernova anytime soon. It may take 100,000 years to reach that stage.this is Consistent with the recommendations of other scientists.

This research also shakes our understanding of the size of stars. “The actual physical size of Betelgeuse is a bit mysterious-early research suggests that it may be larger than Jupiter’s orbit. Our results show that Betelgeuse only extends to two thirds of its radius, with a radius of 750 times the sun”, Konkoly Observatory, Budapest Said the co-author Laszlo Molnar.

With the help of Betelgeuse’s size, the team can more accurately calculate its distance from the earth, making it about 530 light years away from the earth, which is close to 25% of the previously known distance. That is still far enough that the earth will not be harmed by Betelgeuse’s future explosion.

Joyce said: “When a supernova explodes, this is still a big problem. This is our closest candidate. It provides us with a rare opportunity to study what happens to stars like this before they explode. ”


Source link