More than five years ago, humanity has yet to detect a wave of gravity.
Now, the observations are flowing at an astonishing rate. In the six months since last year, LIGO-Virgo has detected an average of 1.5 gravitational waves per week.
From April 1 to October 1, 2019, the upgraded LIGO and anti-virus measuring instruments detected 39 new gravitational waves: the oscillation wave shook the space from a major collision between neutron stars or black holes. In total, the Gravity-Wave Transition Directory 2 (GWTC-2) now includes 50 activities.
This has provided us with the most complete black holes in our arsenal, representing a number of black holes, which not only have not been discovered before, but also reveal the afterlife of previously unexplored depths and binary stars.
Northwestern University astronomer Christopher Berry, a member of the LIGO Scientific Cooperation (LSC), said: “Gravity wave astronomy is revolutionary – revealing to us the potential lives of black holes and neutron stars.”
“In just five years, we have had more than 40 catalogs without knowing the existence of a binary black hole. The third observation runs made more discoveries than ever before. Combining them with previous discoveries, a beautiful picture of the rich varieties of the universe is drawn. of binaries. “
You have already heard of some new discoveries made from observation operations.
GW 190412 (the gravitational wave phenomenon is known by the time they were discovered) was the first black hole collision, and the mass of the two black holes did not match. The collision of other black holes previously discovered is more or less related to the mass binary system.
GW 190425 is thought to have been the collision of two neutron stars, only to be discovered a second time (the first in August 2017).
GW 190521 finally proved that there was a “medium-weight” class that could easily be trapped between a constellation and a super-behemoth.
GW 190814 was the first collision involving an object in the “mass space” between the neutron stars and the black hole.
“So far, LIGO and Virgo’s third observation has yielded a lot of amazing results,” said Maya Fishbach, a Northwestern University and LSC astronomer.
“After a second look, I thought we would see the entire spectrum of the binary black hole, but the landscape of the black hole is richer and more diverse than I thought. I was so excited to see what future observations would teach us. “
This is not all about transporting new data. In addition to GW 190426_152155 and GW 190924_021846, the two activities were exceptionally special. Yes, these names are longer: when we find more events, there may not be enough time to identify them, so the new naming convention includes time in UTC.
“One of our new discoveries is that GW 190426_152155 may be joined by the neutron star of a black hole in a six-mass mass,” said Albert Astronomer Sergei Ossokin. “Unfortunately, the signal is very low, so we can’t be sure.” Potsdam, Einstein Institute, Germany.
“GW 190924_021846 Of course it comes from a combination of the two lightest black holes we have ever seen. One has a mass of six suns and the other has nine suns. There are large objects like GW 190814 in sync. You don’t know if these are black holes.”
The merger of black holes and neutron stars is described in a new population of four papers.
First Paper 39 New Incidents. The second paper reconstructed the mass and circular distribution of 47 merging events found in the entire GWTC-2 catalog, and estimated the collision rates of black holes and neutron stars. He searched hard for the crack of gamma rays associated with the third paper merging incident (found nothing). In the fourth article, the data against the general relativity estimator are evaluated as destructive, and the total relativity is completely preserved.
Overall, the new aggregation phenomenon is not the only way to study collisions. It provides us with a way to directly explore black holes, as they are extremely difficult to detect because they do not emit uncontrollable radiation.
Thanks to a wave of gravity, we know more about these objects than we did a year ago. From here it goes to the snowdrift.
“Combining the black hole and the neutron star is a unique laboratory,” Berry said.
“We can study both of their gravitational pulls – so far Einstein’s total relativity has undergone each test – and astronomical physics on how to live the lives of huge stars. “LIGO and Virgo have changed our ability to monitor this binary system, and the detection rate will only accelerate as investigators improve.”
LIGO posted the first steps on its website while awaiting peer review. They can be found here, here, here, and here.
