Category archives: Cosmology

What if the universe rotates?

What if the universe rotates?

AstrophysicsCosmology

By Mapping Ignorance

A new study suggests the universe may rotate—just extremely slowly. The finding could help solve one of astronomy’s biggest puzzles. Current models say the universe expands evenly in all directions, with no sign of rotation. This idea fits most of what astronomers observe. But it doesn’t explain the so-called Hubble tension—a long-standing disagreement between two […]

Does the universe really behave the same way everywhere?

Does the universe really behave the same way everywhere?

AstrophysicsCosmologyPhysics

By César Tomé

A new study presents a methodology to test the assumption of cosmic homogeneity and isotropy, known as the Cosmological Principle, by leveraging weak gravitational lensing—a light distortion effect described by general relativity—in astronomical images collected by new observatories such as the Euclid Space Telescope. Finding evidence of anomalies in the Cosmological Principle could have profound […]

A boson travelling slower than escape velocities of stars and galaxies

A boson travelling slower than escape velocities of stars and galaxies

AstrophysicsCosmologyDIPC Particle Physics

By DIPC

The emergence of detector technologies with sensitivity to lower energies and improved resolution invites a shift of emphasis in particle-decay searches for massive neutral bosons: the kinematic limit of these reactions remains an unexplored realm where cosmologically-relevant particles may be waiting to be discovered. A case that illustrate this is the charged lepton flavour violating […]

Is new physics needed to explain the early galaxy problem?

Is new physics needed to explain the early galaxy problem?

AstronomyAstrophysicsCosmology

By Invited Researcher

early galaxy problem Author: Rajendra Gupta, Adjunct professor, Physics, L’Université d’Ottawa/University of Ottawa Early universe observations by the James Webb Space Telescope (JWST) cannot be explained by current cosmological models. These models estimate the universe to be 13.8 billion years in age, based on the big-bang expanding universe concept. My research proposes a model that […]

Galaxies from the early Universe are more like our own Milky Way than previously thought

Galaxies from the early Universe are more like our own Milky Way than previously thought

AstronomyAstrophysicsCosmology

By César Tomé

Galaxies from the early Universe are more like our own Milky Way than previously thought, flipping the entire narrative of how scientists think about structure formation in the Universe. Using the James Webb Space Telescope (JWST), an international team of researchers has discovered that galaxies like our own Milky Way dominate throughout the universe and […]

Unprecedented sensitivity in an experimental setup for dark photons

Unprecedented sensitivity in an experimental setup for dark photons

CosmologyParticle physicsPhysics

By César Tomé

Scientists working on the Dark SRF experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory have demonstrated unprecedented sensitivity in an experimental setup used to search for theorized particles called dark photons. Researchers trapped ordinary, massless photons in devices called superconducting radio frequency cavities to look for the transition of those photons into […]

Refsdal measurement of the Universe’s expansion rate

Refsdal measurement of the Universe’s expansion rate

AstronomyAstrophysicsCosmology

By César Tomé

Thanks to data from a magnified, multiply imaged supernova, a team of researchers has successfully used a first-of-its-kind technique based on the Refsdal method to measure the expansion rate of the Universe. Their data provide insight into a longstanding debate in the field and could help scientists more accurately determine the Universe’s age and better […]