Supergiant star BeatleJuss small, closer than first thought

Supergiant star BeatleJuss small, closer than first thought

Credit: Alma (ESO / NAOJ / NRAO) / E. O’Gorman / P. Carvela

A new study by an international team of researchers has revealed that it will be another million years until the giant red star Batalzuez dies in a fiery explosion.

Dr. Australian Australian National University (ANU). The study, led by Meredith Joyce, gives the Beatles a new lease on life, but also shows that it is closer and closer to Earth than previously thought.

Dr. Joyce says that the supergiant – which is part of the Orion constellation – has long fascinated scientists. But lately, he’s been behaving strangely.

“It’s usually one of the brightest stars in the sky, but we’ve observed two drops in the brightness of the Battlesews since late 2019,” said Dr. Joyce.

“Speculation about this is likely to explode. But our study offers a different explanation.

“We know that the first obscure event involved a cloud of dust. We found that the second minor event was probably due to a starbeat.”

Researchers were able to use hydrodynamic and seismic modeling to learn more about the physics that drive these beats – and to get a clear idea of ​​what stage of life it is facilitated.

According to Dr. Shing-Chi Lang, co-author of the University of Tokyo, the analysis “confirms that the pressure waves, the sound waves, are the reason for the beating of the BattleJues.”

“It’s burning helium in its roots at the moment, which means it’s nowhere near explosions,” said Dr. Joyce said.

“We will look at about 100,000 years before the eruption.”

The co-author of the Concoli Observatory in Budapest, Dr. Lazli Molner says the study also found out how big the Battlegeus is, and how far it is from Earth.

“The actual body size of the betalus has remained a bit of a mystery – previous studies suggest it may be higher than the orbit of Jupiter. Our results say that the betalus extends only up to two-thirds of its radius, 750 times the radius of the Sun.” Molner said.

“Once the physical size of the star, we were able to determine the distance from the Earth. Our results show that it is only 530 light years from us – 25 percent closer than previously thought.”

The good news is that the Batalus is too far from Earth to explode here, which has a significant impact here.

Dr. “It’s still a really big deal when the supernova is gone. And this is our closest candidate. We rarely get a chance to study what happens to this before the stars explode,” Joyce said.

The study was funded by The Qawwali Institute for Physics and Mathematics at the University (WPI), University of Tokyo and facilitated by the ANU Distinguished Visitor Program. It involved researchers from the United States, Hungary, Hong Kong and the United Kingdom, as well as Australia, Australia and Japan.

This has been published in the study Astrophysical Journal.

The rendering continues, falling to an intensity of 1.506

More info:
Meredith Joyce et al. Standing on the Giants’ Shoulders: New Mass and Distance Estimates for Betalages by Evolutionary, Astrosymic and Hydrodynamic Simulations Combined with MESA, Astrophysical Journal (2020). DOI: 10.3847 / 1538-4357 / ABB 8 dB

Provided by the Australian National University

Testimonial: Supergiant Star Battlegez Small, Closer to First Thinking (2020, 16 October) from 16 October October 2020

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