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Latest Astroparticle physics Stories

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...

Evidence Of Dark Matter In WIMP Experiment
2013-04-16 09:16:50

April Flowers for redOrbit.com - Your Universe Online Using detectors created at Stanford, an international collaboration of scientists has, for the first time, observed a concrete hint of a WIMP — weakly interacting massive particle.  Physicists believe the WIMPs could be the particles behind the mysterious phenomenon of dark matter, which is thought to make up nearly a quarter of the Universe´s mass-energy. Texas A&M high-energy physicist Rupak Mahaptra is part of...

Evidence That Dark Matter Is Real
2013-04-04 05:36:28

[ Watch the Video: AMS Time Lapse Installation ] John P. Millis, Ph.D. for redOrbit.com — Your Universe Online For decades scientists have wondered whether a mysterious form of matter — known simply as Dark Matter since it does not interact directly with light — makes up the majority of the “stuff” in the Universe. Researchers have pointed to the seminal work on the Bullet Cluster of galaxies as evidence that dark matter is a real substance. But similar...

2013-03-18 20:49:50

AURA announced today that Dr. Steven M. Kahn will assume the role of Director of the Large Synoptic Survey Telescope (LSST) Project effective July 1, 2013. Dr. Kahn will succeed Dr. Sidney C. Wolff and retain his current affiliation with SLAC and Stanford. LSST is the top-ranked large-scale ground-based project for the next decade as recommended by the National Research Council´s Astronomy and Astrophysics decadal survey (Astro2010). By digitally imaging the sky for a decade, the LSST...

New Cosmic Ray Telescope Hosted By Space Station
2013-03-12 15:44:52

University of Chicago The National Aeronautics and Space Administration has awarded $4.4 million to a collaboration of scientists at five United States universities and NASA´s Marshall Space Flight Center to help build a telescope for deployment on the International Space Station in 2017. The U.S. collaboration is part of a 13-nation effort to build the 2.5-meter ultraviolet telescope, called the Extreme Universe Space Observatory. UChicago Prof. Angela Olinto leads the U.S....

Where Do Cosmic Rays Come From?
2013-03-01 05:33:26

[ Listen to the Webcast ] John P. Millis, Ph.D. for redOrbit.com — Your Universe Online As we search the heavens, one of the striking observations is that we are constantly bombarded by a stream of extremely high energy charged particles, traveling at nearly the speed of light. Known as Cosmic Rays — composed mostly (90%) of protons with the rest mostly heavy nuclei and a small number of electrons — these particles appear to come from all directions. But where do...

Black Hole Radiation Blasted Earth During 8th Century
2013-01-21 11:56:25

Lee Rannals for redOrbit.com - Your Universe Online According to a new study, black hole cosmic radiation blasted into the Earth back in the 8th century. Japanese astrophysicist Fusa Miyake discovered last year clues for the strange event located in the rings of ancient cedar trees that dated back to either 774 or 775 AD. Researchers teamed together to determine what had caused the surge in carbon-14 in the rings and found no evidence of a supernova, as they had expected. The...

Fermi Telescope Turns to Dark Matter Search
2013-01-21 10:58:25

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online For much of the last century, scientists have been searching for a mysterious substance thought to make up about 85 percent of the total mass of the Universe. Without it, galactic rotation curves, galaxy interactions and the very structure of the Universe are inconsistent with our knowledge of physics. Yet, this so-called dark matter remains elusive. One reason researchers have had such a difficult time finding and...


Latest Astroparticle physics Reference Libraries

7_58175f5465a1e9a63adec3509c888ff12
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....

6_da99fb8ccd6eba27f4bcf7590775bd272
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...

6_c75a47629377d810d1848fd2d1c26e952
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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Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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