Sunday , December 5 2021

Scientists detect gravitational waves from 4 new collisions & # 39; Black Holes



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The astronomisti now caught more observations of gravity waves than can count on their fingers & # 39;.

Scientists with the gravity wave observatories of the LIGO and Virgo report four & # 39; & # 39 new sets; these ripples in spacetime. Those additions bring the total number to 11, the researchers say in a study published on 3 & # 39; & # 39 in December; arXiv.org, which marks great progress since the first detection of gravitational waves in 2015SN: 3/5/16, p. 6).

All but one of the 11 group & # 39; waves were stirred at & # 39; of & # 39 violent collisions; two black holes. The one remaining discovery & # 39 ;, & # 39 reported in, in October 2017, was instead comes from smashup of & # 39; two stellar corpses called neutron stars (SN: 11/11/17, p. 6).

The observations are beginning to reveal how often these waves jiggle the cosmos, and of hidden cosmic figures soluble properties to the face. For example, the data indicate that black holes can merge more often earlier in the universe story, researchers report in a study put on another 3 & # 39; December fil-arXiv.org. The team also concluded that few mergers involving black holes greater than about 50 times the sun's mass.

"There is strong evidence that those true [larger] black holes are missing, "says a member of the LIGO Daniel Holz, astrofiżjista at the University & # 39; Chicago. theoretical physical Some have predicted that the dearth of & # 39; bulky black holes, based on the & # physical 39, stellar explosions produce kożmiku neck.

The black holes that bring the records to produce one of the new sets & # 39; & # 39 rigors; space & # 39; time. The combined mass of the behemoths that qbidet was the biggest spettata, b & # 39; one black hole weighing about 50 times the mass of the sun, and the other at 34 times the solar mass. Those ripples originated and more & # 39; away from any previous discovery: about 9 billion light years from Earth, give or take a few billion. "Striking b & # 39; in every possible way", says physical Emanuele Berti Johns Hopkins University, who was not involved in the research. "It's super interesting."

Two LIGO detectors – located in & # 39; Hanford, Wash., And Livingston, La., – and Virgo, near Pisa in Italy, derelict for promotions until next spring. Improving equipment can & # 39; doubling the number of & # 39; sightings of gravitational waves, says Holz. "We will get a whole bunch more."

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