A new study shows that dark matter is a mysterious matter that exerts gravity but does not emit light. In fact, it may be composed of a large number of ancient black holes formed at the beginning of the universe.
This conclusion comes from the analysis of gravitational waves or ripples. Time and space, Is composed of black holes and Neutron Star.
Ripples-marked with GW190425 with GW190814 -Detected in 2019 by the Laser Interferometer Gravity Wave Observatory (LIGO) in Washington and Louisiana and the Virgo Interferometer near Pisa, Italy. Previous analysis has shown that ripples are caused by collisions between black holes and our sun between 1
But this will cause one of the objects in each collision to be called a solar-mass black hole by astrophysicists, whose mass is about the mass of the sun.
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The lead author of the study, Volodymyr Takhistov of the University of California, Los Angeles, said: “Black holes of mass are very mysterious, which is unpredictable by conventional astrophysics, such as star explosions or supernovae. Crush large stars into black holes.” Angelis told Live Science in an email.
Instead, the authors made recommendations in a study published in the study on February 16. Medical letter, These solar-mass black holes may be “primitive” black holes produced during the “big bang”. Takostov said they may have formed after neutron stars were converted into black holes-they swallowed primitive black holes, or after absorbing some of the proposed dark matter, the mysterious matter that generates gravity would not interact with light.
Primordial black hole
Primitive black holes (if they exist) are likely to be produced in large numbers within the first second of the Big Bang about 13.77 billion years ago. They could have been in various sizes- The smallest will be micro And the biggest Tens of thousands of times the mass of the sun..
Calculations show that the smallest molecules now emit quantum particles through a process called Hawking radiation, thereby “evaporating”, so that only primitive black holes with a mass greater than 10^11 kilograms (approximately the mass of an asteroid) exist. Today.
Some astrophysicists believe that if they do exist, these ancient black holes may form a huge halo of “dark matter” in peripheral galaxies.
Researchers want to know whether they can distinguish between primitive black holes and black holes formed by black holes. Neutron Star, The faint remnants of supernovae are left behind when their parent stars explode after consuming all the hydrogen in the nucleus Fusion reaction.
Astrophysicists have calculated that stars smaller than five times the mass of the sun collapsed, leaving behind a neutron star of ultra-dense matter, and our sun’s mass is about the size of a city. Life Science Report.
According to this theory, the gravity of certain neutron stars will continue to attract dark matter particles. This new study shows that eventually their gravitational pull will become so great that the neutron star and dark matter will collapse together into a black hole.
Another option proposed by the study is that the neutron star may attract and merge with an original black hole, and then the black hole sinks at the center of gravity of the neutron star and is expelled from the surrounding matter until only the black hole remains.
Takhistov and his colleagues believe that black holes transformed from neutron stars must follow the same mass distribution as the neutron star from which they originated, depending on the size of their parent star.
The study authors wrote that with this in mind, they reviewed the data of about 50 gravity wave detections so far and found that only two GW190425 and GW190814 involved objects of suitable mass were primitive black holes.
The study is not conclusive: the two collisions may still involve neutron stars of the detected masses, or black holes transformed from neutron stars of these sizes. The author writes, but it is theoretically believed that the mass distribution of neutron stars in the universe makes this unlikely.
Takistov said: “Our work has carried out a powerful test to understand their origin and relationship with dark matter.” “In particular, the test shows that black holes are significantly heavier than about 1.5 solar masses, which is extremely low. It may be’transformed’ into a black hole by the destruction of a neutron star.”
This study shows that if this is the case, it indicates that primordial black holes may indeed exist, and they may be part of dark matter.
Takhistov said that with more gravity wave detection, the method will become more accurate: “The test is statistical in nature, so collecting more data will help better understanding.”
Originally published in “Life Science”.