|NASA Says, Earth May Have 'Hairy' Dark Matter|
WASHINGTON: NASA Says, Earth May Have 'Hairy' Dark Matter
There may be long filaments of dark matter or "hair" on our land, suggests new research, adding more research is needed to unravel the mysteries of the nature of dark matter on Blue Marble.
Dark matter is an invisible and mysterious substance that accounts for about 27 percent of all matter and energy in the universe.
Ordinary matter, which is all that we see around us, is only five percent of the universe.
The rest is dark energy, a strange phenomenon associated with the acceleration of our expansion of the universe.
According to previous calculations and simulations performed during the last decade, dark matter forms "grained flow" of particles moving at the same speed and orbit galaxies like ours.
"A flow can be much larger than the solar system itself and there are many different flow through our galactic neighborhood, said Gary Prezeau Jet Propulsion Laboratory of NASA in Pasadena, California.
He concluded that when a dark matter stream passes through a planet, particle fluxes are concentrated in an ultra dense filament or "hair" of dark matter.
In fact, it would take many of these hairs growing on the land.
A regular flow of material would not go through the land and on the other side. But in terms of dark matter, the land is not an obstacle.
According to simulations of Mr. Prezeau, Earth's gravity would bend and focus the flow of dark matter particles in a narrow and dense hair.
The hairs emerging from the two planets have "roots", the highest concentration of dark matter particles in the hair and "advice", where the hair ends.
When the particles of dark matter stream passing around the core of the earth, they focus on the "root" of a hair, where the particle density is about a billion times more than average.
The root of a hair in such should be about 1 million km away from the surface, or twice as much as the moon.
The stream of particles that feed the earth's surface to form the tip of the hair, about twice as far from Earth as the hairline.
"If we could identify the location of the root of these hairs, we could potentially send a probe there and get a windfall data on dark matter," noted Mr. Prezeau.
A data stream through Jupiter's core would produce more dense roots: almost one billion times more dense than the original stream, according to Mr. Prezeau simulations.
"Dark matter has eluded all attempts at direct detection for over 30 years. The roots of the hairs of dark matter would be a place attractive to look at, given how dense they are supposed to be," said Charles Lawrence, scientific chief for JPL.
The study was published in the Astrophysical Journal.