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Ancient light illuminates matter that fuels galaxy formation

Researchers have made groundbreaking discoveries about the formation of galaxies and stars using data from the Atacama Cosmology Telescope. By analyzing microwave observations, they found that only a small percentage of gas in galaxies (about 10%) is turned into stars, shedding light on why galaxy formation remains inefficient.

SourceCornell University·JournalPhysical Review D·DateMar 15, 2021

Elements of surprise: neutron stars contribute little, but something's making gold, research finds

A new analysis of galaxy evolution finds that neutron star collisions do not create the quantity of chemical elements previously assumed. Instead, an entirely different sort of stellar phenomenon - unusual supernovae with strong magnetic fields - is responsible for making most of the heavy elements, including gold.

Unequal neutron-star mergers create unique "bang" in simulations

A team of researchers found that unequal neutron-star mergers can create an electromagnetic signal, which could be detected using gravitational-wave detectors like LIGO. The simulations revealed that the larger star tears apart its partner, creating a slower merger and allowing an 'electromagnetic bang' to escape.

SourcePenn State·JournalMonthly Notices of the Royal Astronomical Society·DateAug 3, 2020

Hubble makes surprising find in the early universe

A team of European researchers used Hubble Space Telescope to study the early Universe, finding no evidence of Population III stars. The discovery suggests that galaxies must have formed much earlier than previously thought, supporting the idea that low-mass galaxies are responsible for reionisation.

SourceESA/Hubble Information Centre·JournalMonthly Notices of the Royal Astronomical Society·DateJun 3, 2020

Solved: The mystery of the expansion of the universe

A UNIGE researcher has solved a scientific controversy about the speed of the universe's expansion by proposing that it may not be homogeneous on a large scale. This approach eliminates a divergence between two independent calculation methods, which previously yielded conflicting values for the Hubble constant.

SourceUniversité de Genève·JournalPhysics Letters B·DateMar 10, 2020

Tracking down the mystery of matter

Researchers at PSI measured a property of the neutron more precisely than ever before, finding it has a significantly smaller electric dipole moment. This challenges the long-held assumption that this dipole moment could help explain the excess of matter in the universe.

SourcePaul Scherrer Institute·JournalPhysical Review Letters·DateFeb 28, 2020

From big data to precision cures

The University of Arizona Center for Innovation in Brain Science has received a $1.6 million grant to apply big data analytics and computational modeling to better understand Alzheimer's disease. The project aims to identify patient-specific therapeutic targets and evaluate the effectiveness and safety of drug combinations.

Indeterminist physics for an open world

A UNIGE physicist proposes altering the mathematical language of classical physics to allow for indeterminism and randomness, resolving contradictions with quantum physics. This shift would enable a more intuitive approach to understanding the world, closer to our everyday experience.

SourceUniversité de Genève·JournalNature Physics·DateJan 7, 2020

Measuring the laws of nature

Scientists have re-measured a crucial physical constant with unprecedented accuracy, setting a new benchmark for physics research. The result could help explain nuclear fusion in the sun, understand element formation after the Big Bang, and improve particle collisions at CERN.

SourceVienna University of Technology·JournalPhysical Review Letters·DateJul 2, 2019

New clues about how ancient galaxies lit up the universe

New observations using NASA's Spitzer Space Telescope reveal that some of the earliest galaxies in the Universe were significantly brighter than anticipated. The excess light suggests that these galaxies released high amounts of ionising radiation, which may have played a key role in the Epoch of Reionisation.

SourceRoyal Astronomical Society·JournalMonthly Notices of the Royal Astronomical Society·DateMay 9, 2019