Clouds of confusing dark matter hung like clothing around some black holes. The presence of such a garment can be seen in the gravitational waves that occur when a black hole merges with another object. It is written by a team of Amsterdam and Spanish astronomers An article on the pre-publication website Archive.
Eighty-five percent of the universe’s matter contains something we do not yet know. We know that this ‘dark matter’ is needed to explain the motions of stars and galaxies. But no one knows what kind of stuff it is. Searches have been in vain for years, including Particle physics experiments.
Over the years, physicists have developed a new approach to the universe: the way Gravitational waves. These waves arise in space time, for example, two black holes or Neutronenstern Move, collide, and merge with each other.
A group of astronomers including Gianfranco Bertone On Adam Coogan From the University of Amsterdam, I now suggest a way to search for dark matter using gravitational waves. These are clouds of dark matter hanging around a black hole.
These dark clothes do not directly affect the gravitational waves, but they do affect the way black holes move. Bradley Cavanaugh Of the Instituto di Fesica de Cantabria in Spain. ‘It mainly happens through the effect of dynamic friction. When a heavy object like a black hole moves through a cloud of particles, it experiences a kind of friction. ‘The cause of this conflict is the effects of gravity.
This friction affects the motion of rotating black holes or neutron stars. It also emits gravitational waves. It shows the final orbits of two black holes or neutron stars orbiting each other before the gravitational waves we can measure dissolve.
If one of the two is wearing dark clothes, they will curl up a little more before merging. So if you measure gravitational waves with fewer cycles than you expect, it is a sign of a dark matter wear.
Primitive black holes
Not sure if there are any darker clothes yet. But astronomers think there are two ways to fit a black hole into such a garment.
One possibility is that they formed around the so-called Primary black holes‘, Coogan e-mailed. These black holes would have formed after the Big Bang, when dark matter (perhaps) would have been more evenly distributed throughout the universe.
The existence of primitive black holes is still uncertain. If they exist, the dark matter near a primitive black hole will be gravitationally bound during its formation and will form dark clothing. This is comparable to the way the Moon connects to the Earth by gravity.
Do you know more? Read an interview with Gianfranco Bertone here, One of the authors of this study.
In the second case, the universe is a little older. “These are black holes that form in a cloud of dark matter,” Cavani said. ‘The black hole, at a high concentration of already dark matter, can form a dark layer all around.’
So you don’t get a dark dress like a black hole. If you have one, it’s hard to keep it. Clothing can be easily ripped off due to environmental disturbances. Kawana: ‘One question we would like to answer immediately is: How many black holes can measure dark clothing?’
Waiting for Lisa
The existence of dark clothing is still spec spec. If they exist, most current gravitational wave detectors will not be able to detect them, the researchers write. “To find a dark dress, we need a special system,” Cavani says. It is a black hole 100 to 100 thousand times larger than the Sun, with lighter black holes or neutron star spirals. Wears heavy black hole clothing.
“The frequency of the gravitational waves emitted by these special systems is very low for current gravitational wave detectors,” Cogan added. The Future LISA detector, Must be in space, they can be measured. ‘We will have to wait at least ten years for LISA. It gives us time to improve our theoretical models, so we will be ready when the measurements start. ‘
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