Latest Astroparticle physics Stories

LUX Dark Matter Detector Finds Nothing Yet
2013-10-30 13:49:42

Brett Smith for redOrbit.com - Your Universe Online Just three months into its operation the Large Underground Xenon (LUX) experiment is already the most sensitive dark matter detector in the world, according to scientists from Brown University. “LUX is blazing the path to illuminating the nature of dark matter,” said Rick Gaitskell, professor of physics at Brown University and project spokesperson. The detector sits over a mile below the Sanford Underground Research Facility in...

Experiment Looks For Dark Matter Particle
2013-10-29 08:16:46

John P. Millis, PhD for redOrbit.com - Your Universe Online As we peer into the darkness of space we find stars, planets, nebulae, and gas clouds. These objects are all made of normal matter – protons, neutrons, electrons, and other elementary particles. But it is the matter that we don’t see that has confounded astronomers for decades. An estimated 80 percent of the stuff that makes up the Universe does not interact electromagnetically. This aptly named dark matter is...

Space Weather Impacts Pilots And Airline Passengers
2013-10-27 06:19:50

[ Watch the Video: Pilots And Passengers Absorb Cosmic Rays And Radiation ] redOrbit Staff & Wire Reports - Your Universe Online Thanks to space weather, airline pilots absorb approximately as much radiation over the course of a year as a nuclear power plant employee, NASA officials revealed on Friday. In fact, according to the US space agency, pilots are classified as “occupational radiation workers” by the Federal Aviation Administration (FAA) because they fly at heights...

Carbon Capture Monitoring With Cosmic Rays
2013-09-15 04:27:27

redOrbit Staff & Wire Reports - Your Universe Online Researchers from Durham University in the UK are looking towards the stars for a method to reduce costs associated with carbon capture and storage (CCS) – a process that could potentially mitigate contribution of fossil fuel emissions to global warming and ocean acidification. According to BBC News science reporter Simon Redfern, CCS involves capturing carbon dioxide (CO2) from fuel as it is burned at a power station. That CO2...

Cosmic Rays Influence Cloud Formation
2013-09-05 08:39:02

John P. Millis, PhD for redOrbit.com - Your Universe Online Little more than a century ago Austrian-American physicist Victor Hess established that out in the Universe charged particles are accelerated to very high energies, some eventually making their way to Earth. While much of the research into the curiously named cosmic rays – they, in fact, are not rays at all – has focused on determining their origins, scientists have also devoted considerable effort to studying their effects on...

Cosmic Rays Origins
2013-08-30 11:25:08

[ Listen To The redOrbit.com Podcast: The Mystery Of The Origins Of Cosmic Rays ] John P. Millis, PhD for redOrbit.com - Your Universe Online Streaming across the Universe are high-energy charged particles, known as cosmic rays. They move through space, interacting with our galactic magnetic field, deflecting in every possible direction. Eventually these fast-moving particles may impact the Earth’s atmosphere. For more than 100 years astronomers have been aware of their existence,...

Mexico Observatory To Hunt For Gamma Rays In Known Universe
2013-08-22 07:35:15

April Flowers for redOrbit.com - Your Universe Online A new observatory has begun formal operations in Mexico. The High-Altitude Water Cherenkov (HAWC) Gamma Ray Observatory is designed to study the origins of very high-energy cosmic rays and observe the most energetic objects in the known universe. The HAWC uses a unique detection technique that is different from the classical astronomical design of mirrors, lenses, and antennae, making the extraordinary observatory a significant boost...

Dark Matter Not Actually Dark
2013-06-11 09:51:15

John P. Millis, PhD for redOrbit.com — Your Universe Online For more than 80 years physicists and astronomers have been searching for an elusive form of matter that appears to be responsible for most of the mass in the Universe. While the presence of this dark matter can be measured by the gravitational influence of the particles, directly “seeing” the mass has proven troublesome. The working theory for decades has been that the candidate particle should be...

Extragalactic Ankle And Galactic Knee
2013-06-03 17:42:35

Karlsruhe Institute of Technology It is obvious from the data of the KASCADE-Grande experiment at the Karlsruhe Institute of Technology (KIT) that the so-called “knee” of the cosmic rays, a bend in the energy spectrum at high energies, is located at different energies for light and heavy particles. As regards light particles, the scientists have now found that the energy spectrum flattens again beyond the knee and forms a type of “ankle”. This structure indicates...

Blowing Bubbles: The Hunt For Dark Matter Is On At SNOLAB
2013-05-03 05:07:09

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online The search for dark matter has been heating up over the last year or so. First, researchers using the Fermi Gamma-ray Telescope announced that a preliminary analysis of the soft gamma-ray data suggested evidence of dark matter annihilations coming from the galactic center. Then, early results from the Alpha Magnetic Spectrometer found an excess of positrons in their data, an expected signature of dark matter...

Latest Astroparticle physics Reference Libraries

2004-10-19 04:45:44

WIMP -- In astronomy, WIMPs, or weakly interacting massive particles, figure into one explanation of the dark matter problem. The particles are called "weakly interacting" because they seem not to have much interaction with normal matter (electrons, protons, and neutrons) other than gravitational attraction (thus "massive"). Assuming that there are Weakly Interacting Massive Particles, these particles would then fall out of equilibrium with the universe when they are non-relativistic....

2004-10-19 04:45:41

Massive Compact Halo Object (MACHO) -- Massive compact halo objects, or MACHOs, are a type of astronomical body proposed as one possible explanation for the presence of dark matter in galactic halos. A MACHO is a small chunk of normal baryonic matter, far smaller than a star, which drifts through interstellar space unassociated with any solar system. Since MACHOs would not emit any light of their own, they would be very hard to detect. Recent work has suggested that MACHOs are not...

2004-10-19 04:45:41

Cosmic Rays -- Cosmic Rays. Cosmic rays are energetic particles that are found in space and filter through our atmosphere. Cosmic rays have interested scientists for many different reasons. They come from all directions in space, and the origination of many of these cosmic rays is unknown. Cosmic rays were originally discovered because of the ionozation they produce in our atmosphere. Cosmic rays also have an extreme energy range of incident particles, which have allowed physicists to...

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