Researchers have discovered a whole new kind of black hole – one that’s not only sleeping but also seems to be born without the explosion of a dying star.
Researchers mentioned not so long ago that the black hole is totally different from all the different recognized black holes. It is “X-ray silent”, which means that it does not emit very effective X-rays. The presence of X-rays would suggest that dark space was engulfing nearby materials with its strong gravitational pull. And this black hole was not born in some kind of explosion called a supernova.
Black holes are dense objects with a gravity so solid that not even smoothness can escape them.
The newly discovered black hole has a mass no less than 9 times greater than our solar. It was found in the Tarantula Nebula, a massive fuel cloud in the Large Magellanic Cloud galaxy. It lies approximately 160,000 mild years from Earth. A light 12 month is the soft space that moves in 12 months.
A really bright and sizzling blue star with a mass 25 times that of the solar orbits with the black hole in a stellar wedding. This dual system is called VFTS 243. Researchers imagine the companion star will turn out to be a black hole and become part of another after an extended period of time.
Dormant black holes are considered relatively widespread. But they are difficult to find because they bear little or no relation to their surroundings. Many of the proposed candidates were ruled out with further research, including by the group members who found this one.
Tomer Shenar of the University of Amsterdam was the main creator of the research published in Nature Astronomy.
Shenar described the problem of finding dormant black holes saying, “We have identified a needle in a haystack.”
Study co-author Kareem El-Badry of the Harvard & Smithsonian Center for Astrophysics said: “This is the first such object discovered after astronomers have been researching for decades.
The researchers used six years of observations from the Very Large Telescope of the European Southern Observatory mainly based in Chile.
Astronomers say there are different kinds of black holes. Smaller ones, like the one just discovered, are called stellar-mass black holes. There are also intermediate-mass black holes in addition to the supermassive black holes that would exist in the middle of most galaxies.
The collapse of large stars into black holes is often assumed to be related to a robust supernova explosion. In this case, a star perhaps 20 times the mass of our sun blew some of its material into the house, then collapsed in on itself without an explosion.
The shape of its orbit with its companion proves the absence of an explosion.
“The system’s orbit is almost perfectly circular,” Shenar said.
If a supernova had occurred, the engine of the explosion would have pushed the newly formed dark space into a Random route and created a elliptical reasonably than a round orbit, Shenar added.
Study co-author Julia Bodensteiner of the European Southern Observatory in Munich mentioned that black holes can pull in huge amounts of tissue if there’s something nearby.
“Usually we detect them if they receive material from a companion star, a process we call accretion,” Bodensteiner said.
Shenar added, “In so-called dormant black hole systems, the companion is far enough away that material does not accumulate around the black hole to heat up and emit X-rays. Instead, it is immediately swallowed up. through the black hole.
I am John Russell.
Will Dunham reported this story for Reuters. John Russell adapted it for VOA Learning English.
words in this story
sleeping – adj. not currently doing something; not energetic but able to become energetic
stellar – adj. of or referring to celebrities
companion – nm an individual or animal you spend time with (usually used figuratively)
a needle in a haystack – idiom something that can be very difficult to find as it is hidden among many different issues
astronomer – nm a scientist researching stars, planets and different objects in the outer house
Random – adj. chosen or accomplished without plan or design
elliptical – adj. formed as a flattened circle