Ladies and gentlemen, Earth is on its way to be emerging in some serious
love and light. Keep spreading that positivity, because if you've looked up
at the stars lately, a lot of stuff is going on. Seems we're seeing more
stars than usual, Alberta experienced a fireball in the sky, the moon when
its full is creating a type of inner and widely outer aura, there's stars
that are becoming more widespread and blurry in a way, as I've seen one such
as this...Just all kinds of stuff happening right now. Keep your eyes peeled
to the sky once those clouds are gone! ;)

Discovered: Cosmic Rays from a Mysterious, Nearby Object (Update)

*
*

*Nov. 19, 2008:* *An international team of researchers has discovered a
puzzling surplus of high-energy electrons bombarding Earth from space. The
source of these cosmic rays is unknown, but it must be close to the solar
system and it could be made of dark matter. Their results are being reported
in the Nov. 20th issue of the journal Nature.*

<http://apod.nasa.gov/apod/ap060814.html>"This is a big discovery," says
co-author John Wefel of Louisiana State University. "It's the first time
we've seen a discrete source of accelerated cosmic rays standing out from
the general galactic background."

*Right:* An artist's concept of cosmic rays hitting Earth's upper
atmosphere. Credit: Simon Swordy, University of Chicago. [*Larger
image*<http://apod.nasa.gov/apod/ap060814.html>
]

Galactic cosmic rays are subatomic particles accelerated to almost light
speed by distant supernova explosions and other violent events. They swarm
through the Milky Way, forming a haze of high energy particles that enter
the solar system from all directions. Cosmic rays consist mostly of protons
and heavier atomic nuclei with a dash of electrons and photons spicing the
mix.


 To study the most powerful and interesting cosmic rays, Wefel and
colleagues have spent the last eight years flying a series of balloons
through the stratosphere over Antarctica. Each time the payload was a
NASA-funded cosmic ray detector named ATIC, short for Advanced Thin
Ionization Calorimeter. The team expected ATIC to tally the usual mix of
particles, mainly protons and ions, but the calorimeter found something
extra: an abundance of high-energy electrons.

Wefel likens it to driving down a freeway among family sedans, mini-vans and
trucks—when suddenly a bunch of Lamborghinis bursts through the normal
traffic. "You don't expect to see so many race cars on the road—or so many
high-energy electrons in the mix of cosmic rays." During five weeks of
ballooning in 2000 and 2003, ATIC counted 70 excess electrons in the energy
range 300-800 GeV. ("Excess" means over and above the usual number expected
from the galactic background.) Seventy electrons may not sound like a great
number, but like seventy Lamborghinis on the freeway, it's a significant
surplus.

 *Above:* ATIC high-energy electron counts. The triangular curve fitted to
the data comes from a model of dark-matter annihilation featuring a
Kaluza-Klein particle of mass near 620 GeV. Details may be found in the Nov.
20, 2008, edition of Nature: "An excess of cosmic ray electrons at energies
of 300-800 Gev," by J. Chang et al. [*Larger
image*<http://science.nasa.gov/headlines/y2008/images/cosmicrays/counts_big.jpg>
]

"The source of these exotic electrons must be relatively close to the solar
system—no more than a kiloparsec away," says co-author Jim Adams of the NASA
Marshall Space Flight Center.

Why must the source be nearby? Adams explains: "High-energy electrons lose
energy rapidly as they fly through the galaxy. They give up energy in two
main ways: (1) when they collide with lower-energy photons, a process called
inverse Compton scattering, and (2) when they radiate away some of their
energy by spiraling through the galaxy's magnetic field." By the time an
electron has traveled a whole kiloparsec, it isn't so 'high energy' any
more.

High-energy electrons are therefore local. Some members of the research team
believe the source could be less than a few hundred parsecs away. For
comparison, the disk of the spiral Milky Way galaxy is about thirty *
thousand* parsecs wide. (One parsec approximately equals three light years.)


<http://science.nasa.gov/headlines/y2008/images/cosmicrays/a3_release_big2.jpg>"Unfortunately,"
says Wefel, "we can't pinpoint the source in the sky." Although ATIC does
measure the direction of incoming particles, it's difficult to translate
those arrival angles into celestial coordinates. For one thing, the detector
was in the basket of a balloon bobbing around the South Pole in a turbulent
vortex of high-altitude winds; that makes pointing tricky. Moreover, the
incoming electrons have had their directions scrambled to some degree by
galactic magnetic fields. "The best ATIC could hope to do is measure a
general anisotropy—one side of the sky versus the other."

*Right:* The ATIC cosmic ray detector ascends to the stratosphere tethered
to a high-altitude research balloon. More launch images:
*#1*<http://science.nasa.gov/headlines/y2008/images/cosmicrays/a3_erebus_big.jpg>,
*#2*<http://science.nasa.gov/headlines/y2008/images/cosmicrays/a3_team_big.jpg>,
*#3*<http://science.nasa.gov/headlines/y2008/images/cosmicrays/a3_release_big.jpg>
.

This uncertainty gives free rein to the imagination. The least exotic
possibilities include, e.g., a nearby pulsar, a 'microquasar' or a
stellar-mass black hole—all are capable of accelerating electrons to these
energies. It is possible that such a source lurks undetected not far away.
NASA's recently-launched Fermi Gamma-ray Space Telescope is only just
beginning to survey the sky with sufficient sensitivity to reveal some of
these objects.

An even more tantalizing possibility is dark matter.

There is a class of physical theories called "Kaluza-Klein theories" which
seek to reconcile gravity with other fundamental forces by positing extra
dimensions. In addition to the familiar 3D of human experience, there could
be as many as eight more dimensions woven into the space around us. A
popular yet unproven explanation for dark matter is that dark matter
particles inhabit the extra dimensions. We feel their presence via the force
of gravity, but do not sense them in any other way.

How does this produce excess cosmic rays? Kaluza-Klein particles have the
curious property (one of many) that they are their own anti-particle. When
two collide, they annihilate one another, producing a spray of high-energy
photons and electrons. The electrons are not lost in hidden dimensions,
however, they materialize in the 3-dimensions of the real world where ATIC
can detect them as "cosmic rays."

"Our data could be explained by a cloud or clump of dark matter in the
neighborhood of the solar system," says Wefel. "In particular, there is a
hypothesized Kaluza-Klein particle with a mass near 620 GeV which, when
annihilated, should produce electrons with the same spectrum of energies we
observed."

Testing this possibility is nontrivial because dark matter is so, well,
dark. But it may be possible to find the cloud by looking for other
annihilation products, such as gamma-rays. Again, the Fermi Space Telescope
may have the best chance of pinpointing the source.

"Whatever it is," says Adams, "it's going to be amazing."

*For more information about this research, see "An excess of cosmic ray
electrons at energies of 300-800 Gev," by J. Chang et al. in the Nov. 20,
2008, issue of *Nature*.*
Source: 
NASA<http://science.nasa.gov/headlines/y2008/19nov_cosmicrays.htm?list888306>
Source: Nibiru <http://www.niburu.nl/index.php?articleID=19707>


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