Space: Structures and Features
Published

Ancient helium leaking from core offers clues to Earth's formation      (via sciencedaily.com) 

Helium-3, a rare isotope of helium gas, is leaking out of Earth's core, a new study reports. Because almost all helium-3 is from the Big Bang, the gas leak adds evidence that Earth formed inside a solar nebula, which has long been debated.

Space: Structures and Features
Published

Mysterious death of carbon star plays out like six-ring circus      (via sciencedaily.com) 

Scientists studying V Hydrae (V Hya) have witnessed the star's mysterious death throes in unprecedented detail. The team discovered six slowly-expanding rings and two hourglass-shaped structures caused by the high-speed ejection of matter out into space.

Space: Structures and Features
Published

Researchers map the movement of white dwarfs of the Milky Way      (via sciencedaily.com) 

White dwarfs were once normal stars similar to the Sun but then collapsed after exhausting all their fuel. These interstellar remnants have historically been difficult to study. However, a recent study reveals new information about the movement patterns of these puzzling stars.

Space: Structures and Features Space: The Solar System
Published

Look! Up in the sky! Is it a planet? Nope, just a star      (via sciencedaily.com)     Original source 

Among thousands of known exoplanets, astronomers have flagged three that are actually stars.

Space: Structures and Features
Published

Scientists announce discovery of supermassive binary black holes      (via sciencedaily.com) 

Researchers have discovered a supermassive black hole binary system, one of only two known such systems.

Space: Structures and Features
Published

Black hole billiards in the centers of galaxies      (via sciencedaily.com) 

Researchers provide the first plausible explanation to why one of the most massive black hole pairs observed to date by gravitational waves also seemed to merge on a non-circular orbit. Their suggested solution involves a chaotic triple drama inside a giant disk of gas around a super massive black hole in a galaxy far, far away.

Mathematics: General Space: Structures and Features
Published

Mathematical discovery could shed light on secrets of the Universe      (via sciencedaily.com) 

How can Einstein's theory of gravity be unified with quantum mechanics? It is a challenge that could give us deep insights into phenomena such as black holes and the birth of the universe. Now, a new article presents results that cast new light on important challenges in understanding quantum gravity.

Space: Structures and Features
Published

Event horizons are tunable factories of quantum entanglement      (via sciencedaily.com)     Original source 

Physicists have leveraged quantum information theory techniques to reveal a mechanism for amplifying, or 'stimulating,' the production of entanglement in the Hawking effect in a controlled manner. Furthermore, these scientists propose a protocol for testing this idea in the laboratory using artificially produced event horizons.

Mathematics: General Space: Structures and Features
Published

Dark energy: Neutron stars will tell us if it's only an illusion      (via sciencedaily.com) 

Scientists provide the first simulation of neutron star collisions in extensions of general relativity relevant for cosmology, offering a new approach to test gravity.

Space: Structures and Features
Published

'Closest black hole' system found to contain no black hole      (via sciencedaily.com)     Original source 

In 2020, astronomers reported the closest black hole to Earth, located just 1000 light-years away in the HR 6819 system. But the results of their study were contested by other researchers. In a new paper, these two teams have united to report that there is in fact no black hole in HR 6819, which is instead a 'vampire' two-star system in a rare and short-lived stage of its evolution.

Space: Structures and Features
Published

New simulations refine axion mass, refocusing dark matter search      (via sciencedaily.com) 

Axions are today's most popular candidate for dark matter, and numerous experiments are trying to detect them in microwave cavities where the axion should rarely convert into an electromagnetic wave. But a new simulation of the production of axions in the early universe provides a more refined mass estimate, and higher frequency for the EM wave, that is outside the range of these experiments. The new mass comes from adaptive mesh refinement in supercomputer simulations.

Space: Structures and Features
Published

Astronomers map mysterious element in space      (via sciencedaily.com) 

A research team has provided an important clue to the origin of the element Ytterbium in the Milky Way, by showing that the element largely originates from supernova explosions. The groundbreaking research also provides new opportunities for studying the evolution of our galaxy.

Space: Structures and Features
Published

Ancient dwarf galaxy reconstructed with MilkyWay@home volunteer computer      (via sciencedaily.com) 

Astrophysicists for the first time have calculated the original mass and size of a dwarf galaxy that was shredded in a collision with the Milky Way billions of years ago.

Space: Structures and Features
Published

Ultraprecise atomic clock poised for new physics discoveries      (via sciencedaily.com) 

Physicists have made one of the highest performance atomic clocks ever. ­­ Their instrument, known as an optical lattice atomic clock, can measure differences in time to a precision equivalent to losing just one second every 300 billion years and is the first example of a 'multiplexed' optical clock, where six separate clocks can exist in the same environment. Its design allows the team to test ways to search for gravitational waves, attempt to detect dark matter, and discover new physics with clocks.

Space: Structures and Features
Published

How galaxies can exist without dark matter      (via sciencedaily.com) 

Astrophysicists report how, when tiny galaxies collide with bigger ones, the bigger galaxies can strip the smaller galaxies of their dark matter -- matter that we can't see directly, but which astrophysicists think must exist because, without its gravitational effects, they couldn't explain things like the motions of a galaxy's stars.

Space: Structures and Features
Published

Distant galaxies and the true nature of dark matter      (via sciencedaily.com) 

In conflict with the current prevailing theory used to describe the universe, a new study suggests the existence of a direct interaction between the elementary particles that make up the dark matter halo and those that make up ordinary matter.

Space: Structures and Features
Published

Debris from disintegrating planets hurtling into white dwarfs across the galaxy      (via sciencedaily.com) 

The moment that debris from destroyed planets impacts the surface of a white dwarf star has been observed. Astronomers saw X-rays from planetary debris heated to a million degrees as it fell onto the dead core of its host star.

Space: Structures and Features
Published

Too many disk galaxies than theory allows      (via sciencedaily.com) 

The Standard Model of Cosmology describes how the universe came into being according to the view of most physicists. Researchers have now studied the evolution of galaxies within this model, finding considerable discrepancies with actual observations.

Space: Structures and Features
Published

Shadow of cosmic water cloud reveals the temperature of the young universe      (via sciencedaily.com) 

Astronomers have found a new and original method for measuring the cosmic microwave background's temperature when the Universe was still in its infancy. They confirm in their new study the early cooling of our Universe shortly after the Big Bang and open up new perspectives on the elusive dark energy.

Space: Structures and Features
Published

Assessing and optimizing the quality of sensor networks      (via sciencedaily.com) 

When building sensor networks, it can be extremely challenging for researchers to determine how the sensors should be arranged to obtain optimal results. New research proposes a new way to quantify the quality of sensor networks, and uses this method to suggest improvements to existing Dark Matter experiments.