Category archives: Cosmology

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 […]

The origin of the <i>lensing is low</i> problem

The origin of the lensing is low problem

AstrophysicsCosmologyDIPC Computational Cosmology

By DIPC

Recent studies have revealed that the bending of light around massive galaxies is significantly smaller relative to theoretical expectations. This finding, the so-called lensing is low problem, has been interpreted as a breakdown of our cosmological model. Now, a team of scientists has found that the mismatch between theory and observations is actually caused by […]

The Hubble tension in perspective: A crisis in modern cosmology?

The Hubble tension in perspective: A crisis in modern cosmology?

AstrophysicsCosmology

By Tomás Ruiz-Lara

Imagine a Universe that started with a huge explosion setting the beginning of space and time to the point that such concepts have no meaning until then. Imagine a Universe that, after an inflationary phase (extremely fast expansion), kept expanding and forming stars and galaxies distributed in a sponge-like structure dominated by walls and filaments […]

The search for dark matter gets a speed boost from quantum technology

The search for dark matter gets a speed boost from quantum technology

AstrophysicsCosmologyQuantum physics

By Invited Researcher

Nearly a century after dark matter was first proposed to explain the motion of galaxy clusters, physicists still have no idea what it’s made of. Researchers around the world have built dozens of detectors in hopes of discovering dark matter. As a graduate student, I helped design and operate one of these detectors, aptly named […]