Astronomers have found a star who survived a meeting with a black hole

Astronomer Andrew king from the University of Leicester (UK) made a hypothesis of why a small black hole GSN 069 has a very unusual property – every 9 hours extend from it, a powerful flash of x-rays. For black holes, these effects are not uncommon, but the norm – but with such regularity scientists faced for the first time. King suggested that the reason for the star that survived the first encounter with a black hole and is now doomed to a long, but very unusual the death around her.

Black hole GSN 069 is 250 million light years away and is thought to be small – its mass is only 400 000 times greater than the Sun. The mysterious flashes were observed from the two spacecraft, their periodicity is confirmed. King believes that we are witnessing a process of “feeding” – when a star in orbit around a black hole close to it, of its substance is transferred to the accretion disk of the hole, which is accompanied by a flash.

Probably, once the local red giant was too close, and the black hole at once swallowed up a huge portion of its matter, leaving only a small core is a white dwarf. He was captured by the hole and now circling in an orbit about 15 times farther than the event horizon. Star over and over again loses part of its substance, its density becomes less, and it gradually increases in size.

King estimates that a takeover will last for a billion years, during which we can observe very interesting effects. Now the white dwarf mass of 0.21 from the sun, but as the loss of substances it will weigh, as a planet, and then completely turns into a huge sparse cloud of gas. To escape his fate, but you can dream up, as a highly developed civilization sets on the star station of observation to be able to study a black hole from close range in a relatively safe environment.

Leave a Reply

Your email address will not be published. Required fields are marked *


Physicists have learned to turn plastic bottles in supercapacitors

Scientists from the University of California, riverside have developed a technology to produce components for supercapacitors from regular waste. We are talking about polyethylene terephthalate or PET, which is made most of plastic bottles. This material is from an economic point of view is significantly superior to high-tech raw materials, like graphene or carbon nanotubes. […]

Looks like a screwdriver of the XXI century

Recently Techcult wrote about the drill of the XXI century with a touchscreen and lasers. But the screwdriver is traditionally considered to be more simple, reliable and very straightforward tool. What similar high-tech screwdriver advanced Italian production? And it is similar to the Kinetic device Driver. Kinetic Driver designed by the Italian designer Giacomo Di […]

Our Solar system is most similar to space croissant

The sun emits powerful electromagnetic winds that envelop the planet in our solar system like a giant bubble. This magnetic bubble is called the heliosphere and protects the planet from dangerous space radiation. Scientists have long believed that the heliosphere is in the form of a comet – with a distinct nose and long flowing […]

Some homemade masks turned out to be more dangerous than no

Despite the fact that the industry has recovered from the shock of the first days of the pandemic COVID-19 and now produces enough facial masks of different types, most people in the world due to various reasons use homemade versions. Everyone understands that they are less effective than professional medical model, but the question is: […]