in the media landscape in recent years and despite the riddles that still surround them and which touch on very deep questions about theoretically they are commonly considered in astrophysics and in . We even study their emissions of gravitational waves during collisions with others relativistic compressions. Most recently, we even got along images of their surroundings that betray the existence of what is believed to be one which is the very definition of a black hole when it is a closed surface.
but the doubt of their presence in certain corners of and is becoming increasingly difficult to justify. What with the early 1960s, when only a handful of visionaries, such as John Wheeler, took these solutions off of seriously even did not do.
The first candidates for the title of black holes were nevertheless flushed out during the 1970s, in the form of awhere a star-sized hole, i.e. produced by the gravity of a probably at least 30 sunbeams, also happened to be a strong source of x-rays upon accretion from its compact star.
This substance, while falling in a spiral towards the black hole, actually forms a compact disc in which viscous frictional forces between the spirals ofadjacent emerge from to the point of producing a bright hot plasma in the X-ray region.
Black holes are among the most opaque objects in the universe. Fortunately, however, they are among the most attractive, and it is by their exaggerated appeal that we can discover them. Giant black holes are the most monstrous ogres in the cosmic zoo, but they are not weapons of mass destruction. The rays of matter they produce would have helped ignite the first stars and form the first galaxies. Hubert Reeves and Jean-Pierre Luminet, specialists in modern cosmology, answer all your questions. Visit the site to find out more. © ECP Group, YouTube
However, we know that the majority of stars form binary systems, so we must expect that there are a certain number of thesein the Milky Way. However, it is also possible that the distance between a star-shaped black hole from its host star is such that no appreciable transfer of matter occurs. So no and no X-ray emission, for example because the star has not yet become one which has expanded to flow over what is called its Roche-lap, named after the mathematician, and 19th century Frenche century.
The first emerging tip of a population of dormant black holes
This kind of black star hole is said to be ”and so far no one had been discovered. That has just changed thanks to an international team of astronomers who used the Flames instrument for their discovery (Fiber Large Array Multi Element Spectrograph) on the VLT of as the researchers explain in an article published in .
To do this, they had to turn their gaze away from the VLTof the Tarantula located in , a neighboring galaxy to our own. Six years of observations were needed for the team led by Tomer Shenar, who began this research at the University of Leuven in Belgium and who is now a Marie-Curie Fellow at the University of Amsterdam, in the Netherlands.
The sleeping black hole candidate has been christened VFTS 243. It contains at least nine times the mass of oursand orbits a hot blue star that weighs 25 times the mass of the Sun. Remarkably, it is not accompanied by noticeable traces of remnants from an explosion of suggesting that as one thinks, a gravitationally collapsing star can sometimes directly turn into a black hole without going through the supernova stage.
” The star that formed the black hole of the VFTS 243 appears to have completely collapsed with no sign of a previous explosionTomer Shenar explains in an ESO statement, in which he adds, Evidence for this “direct collapse” scenario has emerged recently, but our study undoubtedly provides one of the most direct indications. This has enormous consequences for the origin ofblack holes in the cosmos. »
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