Wednesday , June 23 2021

Gravitational wave astronomers define definitions of major black hole joints



Scientists look at screens that display in the LIGO data control room.

LIGO scientists have observed more gravitational waves.Credit: David Rider / Getty Images via Bloomberg

Astronomers have released a new series of gravitational waves – the sparkle of space-time cosmic events.

The aircraft consists of four unified black holes, including a large unification, opened in 2017, which produces over 80 times the black hole of the array.

The research was published on the Web site of the collaborative work of the Laser Interferometer Gravity Wave Observatory (LIGO) and appeared on the array repository on December 3rd.

LIGO identified the first gravity waves in 2015 and informed them of the other waves since the black-hole joining. The final version of the data leads to the combined cache of 10 black-hole joints and the collision of two neutron stars. This phenomenon has helped eliminate space secrets from radio telescopes from the Observatory of Space Gamma radiation.

All 11 events were seen in two LIGO interferometers in Louisiana and Washington. Two of them were seen in the city of Vigo, which he called a sensational observatory in Italy.

In August 2017, observers were particularly happy: apart from the neutron stars, they saw four black-hole joints this month. For the first time, Virgora identified August 14 and launched neutron star search on August 17, and then on August 18 saw another association. "Then I quit smoking," said Joe van den Brand, a physician from the National Institute for Nuclear and Energy Physics at the National Institute of Nuclear Physics (Nikhef) in Amsterdam and representative of the Solidarity Organization.

The international LIGO-Virgo co-operation for the catalog integration revised the data from the events that were discovered in real time in 2015 and at the beginning of 2016, the events that began in late 2016 and ended in 2017.

In particular, the team of data analysis techniques improved since October 2015 – after the first LIGO detection on September 14 – less than a month – the bonavid black and white joint. Previously, they described it as a "candidate" event.

The group also conducted an "independent" analysis and found incidents that had not been previously detected. Physicist Karsten Danzmann of Max Planck's Gravitation Physics Institute in Hanover, Germany, says: "We have decided to wait until the self-analysis is complete, and we must publish all the dark holes in one direction."

According to online data, there is a 80-day mass monster, called GW170729, according to the date. It was determined by a low level of reliability than others, but the group decided to add it to the directory. "GW170729 is still a real event," says Cole Miller, an astrophysicist at the University of Maryland at Colley. This is not a part of cooperation.

In addition to 11 cases, the catalog for the first time opens more than ten "marginal" triggers. These events are at least two interferometer signals, but it is not sufficient to know as an astrophysical potential event.

Changes in the LIGO-Virgo procedure make it relaxed for collaboration to trigger the event and to be explicitly disclosed. Miller says that it will be beneficial to the rest of the astronomy community. "This will allow them to take further action."

According to van den Brand, since the start of 2019, the third power unit has been trying to complete its work to invest its third energy. From September 2017, three detectors are designed for updates that should increase their overall sensitivity almost twice. This means that they have to increase their controlling volumes and their detection rates by eight factors.

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