LIGO Gravity Detector Detects Second Case of Collision of Two Neutron Stars

Scientists working at the LIGO Gravity Observatory have announced yet another discovery of gravitational waves caused by the collision of a pair of neutron stars. This event is the second in a row when scientists were able to understand the distortion parameters of the space-time continuum and determine with sufficient probability the form of the cataclysm of the above type that caused them.

Note that starting in 2015, gravitational waves were recorded only a few dozen times. Their sources are crushing collisions of space objects that release such an amount of energy that is enough to deform the “fabric” of space-time. Since such deformations propagate in space like waves, they reach the Earth over time and sensors like LIGO and Virgo can register them, measure the parameters of gravitational vibrations and determine the location of their source.

Most of the recorded “packets” of gravitational waves were generated by collisions and black hole fusion. But scientists have already recorded waves from a collision of a neutron star and a black hole, and a collision of two neutron stars. Moreover, the event of the latter type has already been registered for the second time.



A “packet” of passing gravitational waves was detected in April 2019 by the LIGO detector in Livingston in the United States. Having tracked the location of the source, the scientists pointed telescopes of observatories to this place from different places on the globe and investigated this space in the optical, radio, x-ray and gamma ranges. The second LIGO detector in Hanford at this point in time was off, and the signal of gravitational waves was too weak and was below the limits of the Italian Virgo detector.

Unfortunately, the last signal from a collision of neutron stars was not accompanied by signals in other ranges, like most of the other recorded signals. Nevertheless, the information contained in it has added quite a lot to our understanding of the nature of gravitational waves.

The unusual feature of the second recorded collision of neutron stars lies in the mass resulting from the fusion of a large neutron star. It exceeds the mass of the Sun by 3.4 times, and all other neutron stars formed as a result of such cases have a mass not exceeding 2.9 solar mass.

“First, the second recorded event associated with the two neutron star system allowed us to confirm the event recorded in 2017,” says Jo van den Brand, lead researcher, “In addition, from observations in In the usual ranges, we were aware of 17 systems with two neutron stars and the approximate masses of these neutron stars. caused such a discrepancy”.