قالب وردپرس درنا توس
Home / Science / When black holes devour stars, it all depends on how you look at it – astronomy now

When black holes devour stars, it all depends on how you look at it – astronomy now



What astronomers see when a black hole devours a nearby star depends on the angle and orientation of the hole, as suggested by a new model. Image: Jane Lixin Dai

In typical galaxies, a black hole devours a nearby star every 1

0,000 years or so in a catastrophic frenzy known as the Tide Disruption Event, or TDE, which can produce tremendously powerful torches as falling material heats up to extreme temperatures , So far, only about two dozen TDEs have been confirmed, and they show a wide variety of radiation, from mostly X-rays to mostly visible and ultraviolet light.

Explaining this diversity was difficult, but astrophysicists at the University of Copenhagen Niels The Bohr Institute and the University of California Santa Cruz have developed a model that shows that the radiation observed in a TDE from the orientation of the black hole and the viewing angle.

"Only in the last decade have we been able to distinguish TDEs from other galactic phenomena, and the new model will provide us with the basic framework for understanding these rare events," said Enrico Ramirez-Ruiz of UC Santa Clara and the University of Copenhagen, co-author of a paper that describes the model in Astrophysical Journal Letters .

Lead author Jane Lixin Dai of the University of Copenhagen said: "It's interesting to see how materials get into the black hole under such extreme conditions." As the black hole freezes star gas, a large amount of radiation is emitted can observe the radiation and with it we can understand the physics and calculate the properties of the black hole, which makes it extremely interesting to go on tidal changes. "

Galaxies that host TDEs are randomly oriented from Earth's point of view. The new model combines general relativity, magnetic fields, radiation and gas hydrodynamics to show what astronomers can expect when looking at tidal events from different angles. Surveying projects are planned to significantly increase the number of confirmed TDEs

"We will see hundreds to thousands of tidal disturbance events in a few years," Dai said. "This will give us a lot of 'laboratories' to test our model and use it to learn more about black holes."


Source link