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Search results for “Astrophysics”

1,000+ results for "Astrophysics"

Magnetic ‘balding’ of black holes saves general relativity prediction

A team of researchers from the Flatiron Institute and Princeton University has found that the magnetic field around a black hole quickly decays when surrounded by plasma. This process, known as 'magnetic reconnection,' rapidly drains the magnetic field and could explain flares seen near supermassive black holes.

SourceSimons Foundation·JournalPhysical Review Letters·TypeComputational simulation/modeling·DateJul 27, 2021

Jets pose many riddles

Researchers aim to understand jets' composition and launch mechanisms by combining theory, observation, and modelling. The goal is to develop a concordance model of jets, overcoming historical divisions between scientific approaches.

Harvard, Smithsonian astronomers help capture first image of black hole's magnetic fields

Astronomers have captured the first-ever image of a black hole's magnetic fields, revealing that polarized light reveals the structure of these fields just outside the event horizon. This breakthrough observation will help scientists understand how energy is extracted from spinning black holes to produce powerful jets.

SourceCenter for Astrophysics | Harvard & Smithsonian·JournalThe Astrophysical Journal Letters·DateMar 24, 2021

Bottling the world's coldest plasma

Rice University physicists have discovered a way to trap the world's coldest plasma in a magnetic bottle, advancing research into clean energy, space weather, and astrophysics. The ultracold plasma has applications for studying solar wind interactions, fusion power, and understanding plasma behavior in complex locations.

SourceRice University·JournalPhysical Review Letters·DateMar 1, 2021

Astronomers agree: Universe is nearly 14 billion years old

Astronomers have estimated the universe's age to be nearly 14 billion years old using data from the Atacama Cosmology Telescope and the European Space Agency's Planck satellite. The findings match the predictions of the standard model of the universe, resolving a discrepancy that had sparked debate in the astrophysics community.

SourceCornell University·JournalJournal of Cosmology and Astroparticle Physics·DateJan 4, 2021

Orbits of ancient stars prompt rethink on Milky Way evolution

A study of ancient star orbits reveals unexpected patterns, contradicting previous assumptions about the Galaxy's metal-poor stars. The research, conducted by a team of astronomers, found that some of these stars orbit in previously unpredicted paths, similar to the Sun's path within the disk.

SourceARC Centre of Excellence for All Sky Astrophysics in 3D (ASTRO 3D)·JournalMonthly Notices of the Royal Astronomical Society·DateNov 16, 2020

Elements of surprise: neutron stars contribute little, but something's making gold, research finds

A new analysis of galaxy evolution finds that neutron star collisions do not create the quantity of chemical elements previously assumed. Instead, an entirely different sort of stellar phenomenon - unusual supernovae with strong magnetic fields - is responsible for making most of the heavy elements, including gold.

Zooming in on dark matter

A recent study published in Nature has zoomed in on dark matter haloes of varying masses, revealing a surprising similarity in their internal structure. The research team used supercomputers to simulate the evolution of the universe and found that even small haloes have dense centers and spread-out outer regions.

Astrophysics: A direct view of star/disk interactions

A team of astrophysicists observes newborn stars' magnetospheric accretion region for the first time, providing insight into star formation mechanisms. The study uses the Very Large Telescope Interferometer (VLTI) and GRAVITY instrument to measure angular size and prove magnetospheric accretion taking place close to stellar surfaces.

SourceUniversity of Cologne·JournalNature·DateAug 31, 2020

Excess neutrinos and missing gamma rays?

Researchers at Penn State suggest that supermassive black hole coronae could be the source of high-energy cosmic neutrinos, exceeding expectations. The new model predicts electromagnetic counterparts in soft gamma-rays, with next-generation detectors poised to explore this possibility.

SourcePenn State·JournalPhysical Review Letters·DateJun 30, 2020

Argonne's pioneering user facility to add magic number factory

The Argonne Tandem Linac Accelerator System (ATLAS) is being upgraded with a new capability to produce beams of heavy atomic nuclei consisting of 126 neutrons, a 'magic number', for nuclear structure and astrophysics research. This upgrade will help scientists test a reigning theory on the formation of heavy elements.

SourceDOE/Argonne National Laboratory·JournalNuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·DateMar 6, 2020