Scientists can now catch Gravitational waves Better than before.
Although physicists only observed the first of these cosmic “chi” in 2015, subsequent improvements in the detector have provided more and more such signals for scientific research.twin Laser Interferometer Gravity Wave Observatory The Louisiana and Washington (LIGO) probes, plus a European probe named Virgo, are currently in another observation gap Coronavirus pandemic And the ongoing upgrade, but the scientists associated with the project spent a lot of time collating the data to create a new catalog that will be included in the first half of the third joint observation event (from April 2019 to September 201
Karsten Danzmann, director of the Max Planck Institute for Gravitational Physics in Germany, said: “One of the keys to the discovery of new gravitational wave signals approximately every five days for six months is the upgrade and improvement of the two LIGO detectors and the Virgo detector. .” Said in the statement.
In the image: Amazing discovery of neutron star impact, gravitational waves, etc.
He specifically pointed out new hardware such as lasers and mirrors, as well as new technologies to reduce background noise. “This increases the volume at which our detector can absorb, for example, the combined signal. Neutron Star Reduce four times! “Danziman said.
The researchers of the project said that better sensitivity allows scientists to capture more gravitational waves, but also more types of signals.
“When you look at the catalog, all events have one thing in common: they come from a combination of compact objects, such as Black hole Or neutron star. However, if you look closely, they are all completely different,” Frank Ohme, a physicist at the Max Planck Institute for Gravitational Physics in Germany, said in a statement: “We will get richer images of gravitational waves. source. These objects have a wide range of masses, from approximately the mass of our sun to more than 90 times its mass, some of them are closer to the earth, and some of them are far away. “
A few of the 39 tests included in the new version have made headlines, including the first Skewed black hole merger, The first observed merger created a Intermediate mass black hole, And is the first observed merger, which includes a Objects within the size range Between the neutron star and the black hole.
The researchers emphasized that this is not the only interesting detection method in this batch. One of the detections may represent a small black hole and a neutron star, Mixed merge Physicists have been waiting for observation. Serge Oszokin, another physicist at the institute, said: “Unfortunately, the signal is still very weak, so we cannot be completely sure.”
He added that another test represented the lightest black hole that scientists have observed so far, one of which is about six times the mass of the sun, while the other half is larger.
And there is more data to study. The second half of the same round of observations began in November 2019 and continued until the coronavirus pandemic forced the detector to send scientific personnel home in late March 2020 to ensure safety.
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