Tag

Axions

All articles tagged with #axions

science1 month ago•19 min saved

Distributed quantum sensors tighten ultralight axion dark-matter bounds

A multi-city network of hyperpolarized noble-gas spin sensors correlates five lab setups to search for transient, defect-induced axion signals. Through amplified signals and optimized noise filtering, the experiment constrains axion–nucleon coupling across 10 peV to 0.2 μeV, achieving 4.1×10^10 GeV at 84 peV. These bounds surpass some astrophysical limits under different model assumptions and illustrate a path toward detecting transient axion phenomena (waves, axion stars, strings, Q-balls) with distributed quantum sensors.

via Nature|

#axions #dark-matter #noble-gas-spins

science2 months ago•3 min saved

Fusion Reactors as Potential Dark Matter and Axion Factories

A new study suggests that fusion reactors might inadvertently produce axions, a candidate for dark matter, through interactions of neutrons with reactor walls, turning these energy devices into potential dark matter factories and offering a novel way to detect elusive particles using existing infrastructure.

via The Daily Galaxy|

#axions #dark-matter #fusion-reactors

science2 months ago•3 min saved

Fusion Reactors Could Unlock Dark Matter Secrets and Revolutionize Energy

Researchers from the University of Cincinnati and collaborators have proposed a theoretical method for producing axions, a candidate for dark matter, inside fusion reactors, building on concepts humorously referenced in 'The Big Bang Theory.' Their findings suggest that fusion reactors could generate particles linked to the dark sector through neutron interactions, offering a potential new avenue for dark matter research.

via ScienceDaily|

#axions #dark-matter #fusion-reactors

science2 months ago•3 min saved

Zombie Stars Could Illuminate Dark Matter Mysteries

Researchers from the University of British Columbia explored the potential link between axions, a dark matter candidate, and white dwarf stars, using data from the Hubble Space Telescope. Although their analysis did not find evidence of axion-induced cooling, it established new limits on axion-electron interactions, guiding future dark matter research. The study highlights the importance of exploring various astrophysical phenomena to understand elusive particles like axions.

via Gizmodo|

#astrophysics #axions #dark-matter

science2 months ago•6 min saved

Old Stars Reveal Clues About Axions as Dark Matter Candidates

Researchers used archival Hubble data to test axion models by examining white dwarf cooling rates, but found no evidence for axions, setting new constraints on their interaction with electrons and highlighting the need for more innovative detection methods.

via Space|

#axions #cosmic-particles #dark-matter

science2 months ago•4 min saved

Physicist Resolves Fusion Reactor Issue Featured in ‘The Big Bang Theory’

A physicist from the University of Cincinnati has theoretically solved a problem related to producing axions, hypothetical particles linked to dark matter, in fusion reactors—an issue that was humorously depicted as unsolvable by Sheldon Cooper and Leonard Hofstadter in 'The Big Bang Theory.' The research, conducted with international collaborators, explores how neutrons in fusion reactors could generate axions, potentially advancing our understanding of dark matter, and adds a real-world scientific breakthrough to a concept previously only discussed in the sitcom.

via Interesting Engineering|

#axions #big-bang-theory #dark-matter

science4 months ago•3 min saved

Scientists Predict Universe's End in Reverse Big Bang Within 20 Billion Years

Scientists propose a model where the universe could stop expanding and collapse into a Big Crunch in about 20 billion years, based on new data suggesting dark energy might be changing over time and a potential negative cosmological constant, challenging the idea of eternal expansion.

via Indian Defence Review|

#axions #big-crunch #cosmological-constant

science4 months ago•4 min saved

Physicists Warn of an Imminent Cosmic Reversal and End

Physicists suggest that due to evolving dark energy and a negative cosmological constant, the universe may eventually stop expanding and collapse in about 20 billion years, potentially leading to a Big Crunch, with axions influencing this process.

via Rude Baguette|

#axions #big-crunch #cosmic-collapse

science5 months ago•6 min saved

Astrophysicists Explore the Evolution of Dark Energy

Recent research suggests that dark energy, which drives the universe's accelerated expansion, may be evolving over time rather than remaining constant, implying the existence of a new, ultra-light particle and potentially altering our understanding of the universe's future.

via Phys.org|

#axions #cosmic-evolution #cosmology

science6 months ago•4 min saved

Researchers Develop Innovative Method to Detect Dark Matter Particles

Researchers from the University of Copenhagen used galaxy clusters and the magnetic fields around them to search for axions, a hypothetical particle linked to dark matter. By combining data from 32 distant black holes, they identified a pattern that hints at the presence of axions, bringing us closer to understanding dark matter. This innovative method could be applied to other radiation types and help narrow down the search for these elusive particles.

via Phys.org|

#axions #black-holes #cosmic-experiment

science8 months ago•8 min saved

Galactic X-ray Observations for Axion Detection

Researchers used X-ray data from the NuSTAR telescope to search for axions, hypothetical particles that could be dark matter, by analyzing galaxy M82 and others. Although no axions were detected, the studies set new constraints on their properties and demonstrated the potential of galaxy observations for future dark matter searches.

via Phys.org|

#axions #dark-matter #galaxies

science1 year ago•3 min saved

Scientists Develop Test for Universe's Life-Supporting Design

A new study proposes a theoretical test to potentially falsify the Anthropic Principle, which suggests the universe is fine-tuned for life. The test involves conditions related to cosmic expansion, axions, and dark matter, though it is currently unfeasible due to gaps in scientific understanding. If proven, it could challenge the notion that the universe is purpose-built for intelligent life, suggesting more complex cosmological theories.

via Yahoo! Voices|

#anthropic-principle #axions #cosmology

science1 year ago•6 min saved

New Test Proposed for the Anthropic Principle in Cosmology

A new study by physicists Nemanja Kaloper and Alexander Westphal proposes a method to test the Anthropic Principle, which suggests the universe is fine-tuned for life. The researchers aim to validate this principle by examining cosmic inflation, dark matter, and axions. They suggest that if future observations, such as those from the LiteBIRD satellite or black hole studies, confirm the presence of ultralight axions as dark matter, it would support the Anthropic Principle. Conversely, if axions are not found to be dark matter, it could challenge the principle's validity.

via Phys.org|

#anthropic-principle #axions #cosmic-inflation

science1 year ago•6 min saved

Supernova Remnants May Unlock Dark Matter Secrets Instantly

Researchers from the University of California, Berkeley propose that gamma rays emitted from neutron stars at the center of supernova explosions could help solve the dark matter mystery if dark matter is composed of axions, hypothetical particles. A nearby supernova could allow detection of these gamma rays, potentially confirming the mass of axions and resolving the dark matter puzzle. The Fermi Gamma-ray Space Telescope would need to be pointed in the right direction to capture this event, which has a 1 in 10 chance of occurring. The team is advocating for a full-sky gamma-ray satellite constellation to ensure no such event is missed.

via Yahoo! Voices|

#axions #dark-matter #gamma-rays

science1 year ago•4 min saved

Nearby Supernova May Unveil Dark Matter Mysteries

A recent study by astrophysicists at UC Berkeley suggests that a nearby supernova could help detect axions, a leading candidate for dark matter. Axions, hypothetical low-mass particles, could be produced in large quantities during a supernova and transform into gamma rays in the presence of strong magnetic fields. The Fermi Gamma-ray Space Telescope could potentially detect these gamma rays, providing crucial insights into axion properties and narrowing the search for dark matter. However, the rarity of nearby supernovae makes this a challenging endeavor.

via Universe Today|

#astrophysics #axions #dark-matter