When black holes or neutron stars collide in the universe, the gravitational waves emanating from them can be observed. Ordinary telescopes do not see them, but detectors can detect them.
About two years ago on August 14, 2019, scientists had detected gravitational waves coming from far away in the universe. These waves were believed to be caused by the merger of two star systems, one with a black hole 23 times larger than the Sun and the other 2.6 times larger. Now scientists have raised the possibility that the second of these secondary objects may have been the heaviest neutron star or the lightest black hole. This study is published in Physical Review Letters.
gravitational wave puzzle
The University of Pisa, the University of Ferreira and the National Institute for Physics conducted a study to understand the source of this gravitational wave GW190814 which was detected by LIGO-Virgo. Researchers associated with the study told Phys.org, ‘According to our model, the density of giant neutron stars is so high that a transition from a phase of normal nuclear matter made up of neutrons, protons and other particles to a phase made of quarks is possible. Maybe there are strange quarks involved.’
Collision of this star with a black hole?
According to researchers, there are two groups of stars, one of which is a normal neutron star and the other is a strange quark star. When a neutron star transforms into a quark star, energy equivalent to a supernova explosion is released. During this study, when the mass of the second object of GW190814 was observed, it was found that it may belong to the same group of quark stars.
These waves give answers to many questions
When massive black holes or neutron stars collide, gravitational waves are produced. Since 2015, America’s Laser Interferometer Gravitational Wave Observatory (LIGO) and its European partner Virgo have tried to detect such signals. Scientists calculate from their sound where the collision may have happened. Sometimes the light emitted from it is visible to telescopes, so that it can be found out how fast they are going.