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Latest Exotic matter Stories

88eed3d812fc21259b4bf99d0a94afa91
2008-12-12 12:45:00

Astronomy & Astrophysics is publishing spectroscopic observations with NASA's space-based Far-Ultraviolet Spectroscopic Explorer (FUSE) of the white dwarf KPD 0005+5106. The team of German and American astronomers who present these observations show that this white dwarf is among the hottest stars known so far, with a temperature of 200 000 K at its surface. It is so hot that its photosphere exhibits emission lines in the ultraviolet spectrum, a phenomenon that has never been seen before....

3ec4ae10354dc6a603f6a2454ee87c3e1
2008-12-11 16:49:34

Calibration tool will reveal when hypothetical particles are detected Several research projects are underway to try to detect particles that may make up the mysterious "dark matter" believed to dominate the universe's mass. But the existing detectors have a problem: They also pick up particles of ordinary matter -- hurtling neutrons that masquerade as the elusive dark-matter particles the instruments are designed to find. MIT physicist Jocelyn Monroe has a solution. A new detector she and her...

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2008-10-17 10:50:00

A team of researchers in Canada have made a bold stride in the struggle to detect dark matter. The PICASSO collaboration has documented the discovery of a significant difference between the acoustic signals induced by neutrons and alpha particles in a detector based on superheated liquids. Since neutron induced signals are very similar to dark matter induced signals, this new discovery, published today, Thursday, 16 October, in the New Journal of Physics, could lead to improved background...

9aba6b63068a5bf9e145d20c09d695891
2008-10-16 09:50:00

University of Arizona scientists experimenting with some of the coldest gases in the universe have discovered that when atoms in the gas get cold enough, they can spontaneously spin up into what might be described as quantum mechanical twisters or hurricanes. The surprising experimental results agree with independent numerical simulations produced by collaborating scientists at the University of Queensland in Australia. The Arizona and Queensland researchers are reporting the results of the...

2008-09-24 15:00:12

Scientists using data from the U.S. space agency's Wilkinson Microwave Anisotropy Probe have identified an unexpected motion in distant galaxy clusters. National Aeronautics and Space Administration researchers say the cause of the motion might be the gravitational attraction of matter that lies beyond the observable universe. "The clusters show a small but measurable velocity that is independent of the universe's expansion and does not change as distances increase," said lead researcher...

cbb7cfe3cd773f49469bc7646d8008b01
2008-09-16 11:35:00

An international team of scientists predict that our Galaxy, the Milky Way, contains a disk of "Ëœdark matter'. In a paper published in Monthly Notices of the Royal Astronomical Society, astronomers Dr Justin Read, Professor George Lake and Oscar Agertz of the University of Zurich, and Dr Victor Debattista of the University of Central Lancashire use the results of a supercomputer simulation to deduce the presence of this disk. They explain how it could allow physicists to directly...

92d258636b65a940b3a8059845008d4d
2008-04-01 11:05:00

Scientists working at the Dublin Institute for Advanced Studies have found a clutch of jets from newborn brown dwarfs. In her talk on Tuesday 1 April at the RAS National Astronomy Meeting in Belfast, postdoctoral researcher Dr Emma Whelan will announce the discovery of more jets from these intriguing objects, bringing the total to 4.New stars form in cold clouds of gas and dust. These so-called stellar nurseries are not only home to forming stars (protostars) but also harbor forming brown...

59a50b1daeeb35c554ef249d682a331e1
2008-03-26 17:10:00

Judi Provencal is star-struck, but not so much by the glitz and glam of Hollywood.You have to look heavenward through a telescope to see the object of her fascination--to pale stars called white dwarfs, their brilliance faded because all of their nuclear fuel has been burned up.A white dwarf is a star that is "dying," cooling down in the twilight of its life. It's what the sun will become in about 4 billion years, according to Provencal.Starting Wednesday, March 26, Provencal--who is an...

377b83935d87033ad70f7d2a812d753c1
2008-02-28 09:07:05

A half-mile down in an old iron ore mine in Minnesota, incredibly sensitive detectors have been waiting for a particle of dark matter, an invisible substance that may form the skeleton of galaxies, to make itself known. A consortium of research scientists, including Stanford physicist Blas Cabrera, anticipated the detection of a predicted-but-undiscovered dark particle known as a weakly interacting massive particle, or WIMP. The hope was that several WIMPs would travel through space and a...

b72dddfd817ff7a4c201a4a948e5f2941
2008-02-25 13:30:00

U.S. experiment retakes the lead in competitive race Scientists of the Cryogenic Dark Matter Search experiment today announced that they have regained the lead in the worldwide race to find the particles that make up dark matter. The CDMS experiment, conducted a half-mile underground in a mine in Soudan, Minn., again sets the world's best constraints on the properties of dark matter candidates. "With our new result we are leapfrogging the competition," said Blas Cabrera of Stanford...


Latest Exotic matter 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_c21be0ecb1b565a9be109a383c38223f2
2004-10-19 04:45:43

White Dwarf -- A white dwarf is a a star supported by electron degeneracy. A star like our Sun will become a white dwarf when it has exhausted its nuclear fuel. Near the end of its nuclear burning stage, such a star goes through a red giant phase and then expels most of its outer material (creating a planetary nebula) until only the hot (T > 100,000 K) core remains, which then settles down to become a young white dwarf. A typical white dwarf is half as massive as the Sun, yet only...

6_79c799b9f03f60809a9d0aecf38491202
2004-10-19 04:45:42

Supernova -- A supernova is a star that increases its brightness drastically within a matter of days, making it appear as if a "new" star was born (hence "nova"). The "super" prefix distinguishes it from a mere nova, which also involves a star increasing in brightness, though to a lesser extent and through a much different mechanism. Astronomers have classified supernovae in several classes, according to the lines of different elements that appear in their spectra. The first...

6_f22173fe0f79e2d306163d61f6859f022
2004-10-19 04:45:42

Strange Matter -- Strange matter (also known as quark matter) is an ultra-dense phase of matter that is theorized to form inside particularly massive neutron stars (which are then known as "strange stars" or "quark stars"). It's theorized that when neutronium is put under sufficient pressure due to the gravitation of a large neutron star, the individual neutrons break down and their constituent quarks form strange matter. Strange matter is composed of strange quarks bound to each...

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...

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Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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