LIGO researchers have nearly frozen the motion of atoms across four mirrors used to detect ripples in space-time, reports Isaac Schultz for Gizmodo. “We could actually use the same capability of LIGO to do this other thing, which is to use LIGO to measure the random jiggling motion of these mirrors—use that information which we have about the motion—and apply a counteracting force, so that you know you would stop the atoms from moving,” says Prof. Vivishek Sudhir.
New Scientist reporter Leah Crane writes that a set of mirrors at LIGO have been cooled to near absolute zero, the largest objects to be brought to this frigid temperature. “The goal of this work is to help explain why we don’t generally see macroscopic objects in quantum states, which some physicists have suggested may be due to the effects of gravity,” writes Crane.
New Scientist reporter Leah Crane writes that researchers from the LIGO and Virgo gravitational wave observatories have potentially detected primordial black holes that formed in the early days of the universe. “When I started this, I was expecting that we would not find any significant level of support for primordial black holes, and instead I got surprised,” says Prof. Salvatore Vitale.
Boston Globe reporter Charlie McKenna writes that MIT researchers have used the spin of black holes detected by the LIGO and Virgo detectors to search for dark matter. "In reality, there is a much broader set of theories that predict or relies on the existence of these very ultra-light particles,” says Prof. Salvatore Vitale. “One is dark matter. So they could be dark matter. But they could also solve other open problems in particle physics.”
A new study by MIT researches finds that some masses of boson particles don’t actually exist, reports Monisha Ravisetti for The Academic Times. “[Bosons] could be dark matter particles, or they could be something that people call axions, which are proposed particles that could solve problems with the magnetic bipoles of particles,” says Prof. Salvatore Vitale. “Because they can be any of these things, that means they could also have an incredibly broad range of masses.”
Physics World selected a study by researchers from MIT’s LIGO Lab that shows quantum fluctuations can jiggle objects as large as the mirrors of the LIGO observatory as one of the top 10 breakthroughs of the year. “The research could lead to the improved detection of gravitational waves by LIGO, Virgo and future observatories,” notes Hamish Johnston for Physics World.
Boston 25 spotlights how scientists from LIGO and Virgo have detected what may be the most massive black hole collision yet. “The result of the black holes colliding created the first-ever observed intermediate black hole, at 142 times the mass of the sun,” reports Boston 25.
Scientists from LIGO and Virgo have detected the largest collision between two black holes to date, which appears to have created an “intermediate-mass” black hole, reports Loren Grush for The Verge. Intermediate-mass black holes, “are really the missing link between [black holes with] tens of solar masses and millions,” says Prof. Salvatore Vitale. “It was always a bit baffling that people couldn’t find anything in between.”
TechCrunch reporter Taylor Hatmaker writes that MIT researchers will led a new NSF-funded research institute focused on AI and physics.
Prof. Nergis Mavalvala has been named the new Dean of MIT’s School of Science, reports Zara Khan for Mashable. Khan notes that Mavalvala “is known for her pioneering work in gravitational wave detection,” and will be the first woman to serve as Dean of the School of Science.
Marina Koren writes for The Atlantic about the continued importance of the discoveries that stem from the LIGO and Virgo laser experiments. “There is something called the gravitational-wave memory effect…that comes out of Einstein’s theory of relativity, but it would be nice to see that directly,” says Salvatore Vitale, a physics professor at MIT and a LIGO scientist.
Sky and Telescope editor Monica Young speaks with WBUR about how scientists from the LIGO and Virgo gravitational wave observatories, including MIT researchers, may have detected a black hole colliding with a neutron star. Young explains that upgrades made to both observatories should enable investigation of not only individual cosmic events, but also the study of neutron stars and black holes as populations.
Adrian Cho of Science magazine writes that the possible black hole-neutron star merger spotted by LIGO and Virgo would be a “gem for scientists,” but work remains to confirm the signal. Prof. Salvatore Vitale, a LIGO member from MIT, tells Cho: “If you ask me, ‘Would you bet a coffee, your car, or your house on this?’ I would say, ‘I’d bet your car.’”
Gizmodo reporter Ryan Mandelbaum explores the five potential gravitational wave detections made by the LIGO and Virgo observatories in the last month. Prof. Salvatore Vitale explained that the possible detection of a black hole colliding with a neutron star could provide scientists with a better way to measure how quickly the universe is expanding.
“LIGO/VIRGO has opened up its notification process to the public,” explains Ars Technica reporter John Zimmer. “In short, anyone who’s interested can find out what LIGO is seeing within a day of when the LIGO scientists themselves do.”