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Cosmic radio bursts as maps to hidden matter in the universe
science29 days ago

Cosmic radio bursts as maps to hidden matter in the universe

Fast radio bursts (FRBs) — brief, intense radio waves from magnetars — are being used as new probes of the universe’s matter distribution. Analysis of about 100 FRBs suggests that gas ejected by galactic feedback smooths cosmic clumpiness, helping distinguish the roles of dark matter, dark energy, and neutrinos in structure formation. Researchers say this is just the beginning, with future FRB catalogs from the Deep Synoptic Array planned for 2029 expected to vastly boost cosmology studies.

via Space|
#astrophysics#cosmology#dark-matter
Astronomers Uncover Cosmic Dance Behind Mysterious Radio Bursts
science1 year ago

Astronomers Uncover Cosmic Dance Behind Mysterious Radio Bursts

Scientists have proposed a new theory that fast radio bursts (FRBs) could be caused by asteroids colliding with neutron stars, releasing massive energy. This hypothesis, led by University of Toronto's Dang Pham, suggests that interstellar objects like asteroids and comets could be numerous enough to account for the observed rate of FRBs. While intriguing, the theory requires further investigation, especially since some FRBs occur repeatedly at the same source, which doesn't align with random asteroid collisions.

via Futurism|
#asteroids#astronomy#frbs
"Unraveling the Mystery: Astronomers Identify Source of Powerful Radio Bursts from Distant Galaxy Cluster"
astronomy2 years ago

"Unraveling the Mystery: Astronomers Identify Source of Powerful Radio Bursts from Distant Galaxy Cluster"

Astronomers have identified the origin of a record-breaking fast radio burst (FRB) that hit Earth in summer 2022, finding that it came from a group of at least seven galaxies interacting with each other. The powerful blast, the furthest ever seen, is believed to have been triggered by the unusual collision of galaxies, potentially associated with the formation of new stars. Understanding the origins of FRBs not only solves a mystery but also provides insights into the universe, as these powerful blasts interact with the material they pass through, potentially carrying messages from distant parts of the universe.

via The Independent|
#astronomy#fast-radio-bursts#frbs
"Astronomers Unveil Record-Breaking Shortest Fast Radio Bursts in History"
astronomy3 years ago

"Astronomers Unveil Record-Breaking Shortest Fast Radio Bursts in History"

Astronomers have discovered the shortest fast radio bursts (FRBs) ever recorded, with one lasting only five microseconds, a thousand times shorter than typical FRBs. These bursts are believed to originate from a galaxy three billion light years away, but their exact nature remains unknown. The discovery suggests that the figure of 10,000 FRBs reaching Earth daily may need to be revised upwards, indicating that a significant fraction of FRBs may have been missed due to computational limitations. The findings also raise questions about the origin of FRB emissions and the impact of the surrounding environment on their time structure.

via physicsworld.com|
#astronomers#astronomy#fast-radio-bursts