Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: physics

Galactic islands of tranquility: ‘Little red dots’ may have brewed life’s building blocks

Astronomers have found that both the core of our Milky Way and the earliest proto-galaxies in the universe share a surprising trait: They are unusually calm and quiet in terms of harsh radiation. This tranquility is not just a cosmic curiosity; it may be essential for forming complex molecules that provide the ingredients of life.

A new study published in The Astrophysical Journal Letters highlights how the Milky Way’s center and mysterious early proto-galaxies known as “little red dots” (LRDs) harbor massive black holes within peaceful, dust-and gas-rich environments. These conditions create natural laboratories for prebiotic chemistry, suggesting that the universe may have supported life’s chemical precursors far earlier than previously imagined.

The work was led by Professor Remo Ruffini and Professor Yu Wang from the International Center for Relativistic Astrophysics Network (ICRANet) and the Italian National Institute for Astrophysics (INAF).

Seeing global trade through the lens of physics

New research from the Complexity Science Hub (CSH) shows why widely used algorithms for measuring economic complexity produce trustworthy results and how these tools may benefit diverse areas such as ecology, social science, and agentic AI. The paper is published in the journal Physical Review E.

The universe is humming with ripples in spacetime: Scientists just doubled our catalog of black hole and neutron star collisions

“The message from this catalog is: We are expanding into new parts of what we call ‘parameter space’ and a whole new variety of black holes,” LVK member Daniel Williams, of the University of Glasgow in the U.K., said in the statement. “We are really pushing the edges, and are seeing things that are more massive, spinning faster, and are more astrophysically interesting and unusual.”

The catalog also demonstrates just how sensitive the LVK detectors have become. Some of the neutron star mergers occurred up to 1 billion light-years away, while some of the black hole mergers occurred up to 10 billion light-years away. These detections have allowed scientists to test the theory that first predicted the existence of both black holes and gravitational waves, Einstein’s magnum opus theory of gravity, general relativity.

Physicists finally see strange magnetic vortices predicted 50 years ago

A team of physicists has experimentally confirmed a long-predicted sequence of exotic magnetic phases in an atomically thin material. When cooled, the material forms tiny magnetic vortices before transitioning into a second ordered magnetic state—exactly as predicted by a famous theoretical model from the 1970s. Observing both phases together for the first time validates key ideas about how magnetism behaves in two dimensions. The findings could help inspire ultracompact technologies built on nanoscale magnetic control.

Galaxy-group motion suggests slower expansion in our cosmic neighborhood

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that analyzes the motion of two nearby galaxy groups within their surrounding cosmic flow. The results indicate that the local universe is expanding more slowly than previously estimated, bringing measurements of nearby galaxies into close agreement with observations of the early universe. The findings also suggest that less dark matter is required to explain the dynamics of galaxies within these groups than previously assumed.

The two studies were recently published in Astronomy & Astrophysics by an international team including David Benisty from the Leibniz Institute for Astrophysics Potsdam (AIP). Each paper analyzes observational data for a different nearby galaxy group—the Centaurus A group and the M81 group—to determine both their masses and the value of the Hubble constant.

The Hubble constant describes how fast the universe expands, expressed as a ratio of the recessional velocity to the distance a galaxy has toward us. The Hubble constant is measured in km/s per Megaparsec, 1 Megaparsec being 3.3 million light years.

Oval orbit casts new light on black hole–neutron star mergers

Scientists have uncovered the first robust evidence of a black hole and neutron star crashing together but orbiting in an oval path rather than a perfect circle just before they merged. This discovery challenges long-standing assumptions about how these cosmic pairs form and evolve.

Researchers from the University of Birmingham, Universidad Autónoma de Madrid, and Max Planck Institute for Gravitational Physics published their findings today (11 Mar) in The Astrophysical Journal Letters.

Most neutron star-black hole pairs are expected to adopt circular orbits long before merging. But the analysis of the gravitational-wave event GW200105 shows that this system traveled on an oval orbit long before merging to form a black hole 13 times more massive than the sun. An oval orbit is something never seen before in this kind of collision.

Unexpected magnetic response in gold and silver atomic contacts contradicts previous theoretical predictions

Researchers from the Department of Physics and the University Institute of Materials at the University of Alicante (UA) and the Low Temperature and High Magnetic Field Laboratory at the Autonomous University of Madrid (UAM) have succeeded in measuring, for the first time, the electrical conductance of gold and silver atomic contacts subjected to extreme magnetic fields of up to 20 teslas, an intensity equivalent to 400,000 times Earth’s magnetic field.

The team observed that, when applying these fields, the conductance of the gold contacts decreases by around 15%, an unexpected result in noble metals such as gold (Au) and silver (Ag). Furthermore, they detected modifications in the formation process of the atomic contact itself, which were particularly marked in silver. These findings contradict previous theoretical predictions, which anticipated a practically non-existent magnetic dependence in pure Au and Ag.

The discovery, published in Physical Review Research, adds a new piece to the knowledge of electronic transport physics at the atomic scale. Achieving a noticeable response to a magnetic field from a conductor consisting of a single atomic channel, as occurs in these metals, is extremely difficult. The results suggest that functional materials can be designed by combining noble metals with magnetically active systems.

Engineers Create Unusual Magnetic Material That Behaves Like Graphene

Researchers at the University of Illinois have discovered a surprising mathematical connection between two areas of condensed-matter physics that were long considered separate. The electronic and magnetic behavior of two-dimensional materials both hold significant promise for future technologies.

/* */