News tagged with dark matter particles
Related topics: sun , dark matter , physical review letters
Dark matter may be an illusion caused by the quantum vacuum
(PhysOrg.com) -- One of the biggest unsolved problems in astrophysics is that galaxies and galaxy clusters rotate faster than expected, given the amount of existing baryonic (normal) matter. The fast orbits ...
Aug 11, 2011 |
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Repulsive gravity as an alternative to dark energy (Part 2: In the quantum vacuum)
(PhysOrg.com) -- During the past few years, CERN physicist Dragan Hajdukovic has been investigating what he thinks may be a widely overlooked part of the cosmos: the quantum vacuum. He suggests that the quantum vacuum has ...
Feb 01, 2012 |
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Four reasons why the quantum vacuum may explain dark matter
(PhysOrg.com) -- Earlier this year, PhysOrg reported on a new idea that suggested that gravitational charges in the quantum vacuum could provide an alternative to dark matter. The idea rests on the hypothesis that particles ...
Nov 28, 2011 |
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Stars Fueled by Dark Matter Could Hold Secrets to the Universe
(PhysOrg.com) -- The first stars in the universe may have been very different from the stars we see today, yet they may hold clues to understanding some of the mysterious features of the universe. These "dark ...
Nov 03, 2009 |
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Serious blow to dark matter theories? New study finds mysterious lack of dark matter in Sun's neighborhood
(Phys.org) -- The most accurate study so far of the motions of stars in the Milky Way has found no evidence for dark matter in a large volume around the Sun. According to widely accepted theories, the solar ...
Apr 18, 2012 |
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Signs of dark matter may point to mirror matter candidate
(PhysOrg.com) -- Dark matter, which contains the "missing mass" that's needed to explain why galaxies stay together, could take any number of forms. The main possible candidates include MACHOS and WIMPS, but there is no shortage ...
Apr 27, 2010 |
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Possible Fifth Force Would Make Direct Detection of Dark Matter Unlikely
(PhysOrg.com) -- No one knows exactly what a “fifth force” might be, but studies have shown that, if a long-range fifth force does exist, it could have surprising effects on the universe’s structure formation. ...
Mar 26, 2009 |
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A Theory of Dark Matter
Among the most astounding, unexpected, and important achievements of the past century (or even more) have been the discoveries of dark matter and dark energy, collectively dubbed the "dark sector."
Sep 08, 2009 |
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World's most powerful atom smasher restarts: CERN
Scientists have restarted the world's most powerful atom-smasher overnight, the European Organisation for Nuclear Research (CERN) said Sunday, as they launch a new bid to uncover the secrets of the universe.
Feb 28, 2010 |
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Mass limits of dark matter derived from 'strange' stars
(PhysOrg.com) -- Much of the matter in our universe may be made of a type of dark matter called weakly interacting massive particles, better known as WIMPs. Although some scientists predict that these hypothetical ...
Oct 12, 2010 |
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Dark Matter May be Easier to Detect than Previously Thought
(PhysOrg.com) -- The Milky Way, like many other galaxies, is thought to be embedded in massive, lumpy amounts of dark matter that release gamma rays and other emissions. Although at first these emissions seem ...
Aug 10, 2009 |
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Dark matter or background noise? Results intriguing but not conclusive
Physicists may have glimpsed a particle that is a leading candidate for mysterious dark matter but say conclusive evidence remains elusive.
Feb 11, 2010 |
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Could dark baryons explain dark matter?
(PhysOrg.com) -- "The prevailing belief about dark matter particles is that they should be about 100 or more times heavier than protons," Subir Sarkar tells PhysOrg.com. "However, we were thinking about the possibility of lig ...
Jul 20, 2010 |
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Highly Sensitive Dark Matter Experiment Disproves Earlier Findings
(PhysOrg.com) -- Early data from a Columbia-led dark matter experiment rule out recent hints by other scientists who say they have found the elusive particle that holds the universe together. The findings ...
May 06, 2010 |
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Sun's dark matter trap
The Sun could be the best place to look for dark matter - the invisible ‘stuff’ that is thought to make up about 83% of the matter in the Universe.
Jul 13, 2010 |
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