COSMIC MELANIN: The Waters Of NU - Are Tiny Primordial Black Holes A Viable Candidate For Dark Matter?!
"Dark matter is central to our understanding of the universe." - Michael S. Turner, the Rauner Distinguished Service Professor and Director of the Kavli Institute for Cosmological Physics at the University of Chicago.
"A lot of what is considered as antimatter, dark matter, dark energy, hyperspace, quantum physics, chaos mechanics, space dust, celestial atoms, neutrinos,... are really scientific nomenclature of cosmic molecular melanin..." - The COSMIC Spirit.
November 17, 2013 - SPACE - Scientists are still debating whether dark matter, which provides the elusive missing mass needed to keep galaxies from flying apart, is made of microscopic particles or macroscopic bodies. On the “macro” side, dark matter could consist of relatively small black holes that formed in the early Universe. If true, astronomers might detect one of these so-called primordial black holes as gravitational lenses of background stars.
The cuurent thinking is that dark matter consists of a new type of particle -a WIMP- that interacts weakly with all the known forces of the universe except gravity, meaning that dark matter is invisible with its presence only detectable via the gravitational pull it exerts.
Research from thousands of scientists relying on the most powerful particle accelerators such as Fermi and the LHC in Geneva and Ice Cube in the Antarctica has to detect or creat any particles that might be dark matter, which led Kim Griest, an astrophysicist at the University of California, San Diego, and his colleagues to investigate black holes as potential dark matter candidates based on the theory that these "primordial black holes" would be far more difficult to detect, and could potentially exist in large enough numbers to make up all dark matter. But based on analysis of data captured by the Kepler Mission which launched in March 2009 to hunt for planets in habitable zones around other stars, Griest and his colleagues have detected no sign of primordial black holes.
For four years, Griest and his colleagues monitored roughly 150,000 Kepler stars at a distance of about 3200 light years. If a primordial black hole passed in front of one of these stars, the star would become temporarily brighter because of gravitational lensing. The team sifted through the available Kepler data and turned up no evidence of black holes between 5 and 80 percent of the moon's mass (around 10−3 Earth masses), suggesting these black holes could not constitute most dark matterin the Milky Way.
Primordial black holes, which come out of certain models of the early Universe, have a wide range of possible masses. However, certain black hole masses have already been excluded as the dominant form of dark matter because they would have shown up in astronomical data. The currently viable range for primordial black holes is between 10−2 and 10−7 Earth masses. Researchers had eliminated the chances that black holes that are approximately the mass of the moon could make up dark matter.
However, even smaller primordial black holes could still make up the entirety of dark matter, Griest told SPACE.com. Future space missions — such as the European Space Agency's Euclid spacecraft or NASA's proposed WFIRST satellite — could look for black holes just 0.0001 percent as massive as Earth's moon.
"We've ruled out a range of primordial black holes as dark matter, but have not ruled them out completely," Griest told SPACE.com. "They're still a viable candidate for dark matter."
Supermassive black holes, like one indicated by the blue dot in the NASA X-ray image of the Andromeda Galaxy at the top of the page, are the opposite of the notion of tiny primordial black holes. - Daily Galaxy.
"A lot of what is considered as antimatter, dark matter, dark energy, hyperspace, quantum physics, chaos mechanics, space dust, celestial atoms, neutrinos,... are really scientific nomenclature of cosmic molecular melanin..." - The COSMIC Spirit.
November 17, 2013 - SPACE - Scientists are still debating whether dark matter, which provides the elusive missing mass needed to keep galaxies from flying apart, is made of microscopic particles or macroscopic bodies. On the “macro” side, dark matter could consist of relatively small black holes that formed in the early Universe. If true, astronomers might detect one of these so-called primordial black holes as gravitational lenses of background stars.
The cuurent thinking is that dark matter consists of a new type of particle -a WIMP- that interacts weakly with all the known forces of the universe except gravity, meaning that dark matter is invisible with its presence only detectable via the gravitational pull it exerts.
Research from thousands of scientists relying on the most powerful particle accelerators such as Fermi and the LHC in Geneva and Ice Cube in the Antarctica has to detect or creat any particles that might be dark matter, which led Kim Griest, an astrophysicist at the University of California, San Diego, and his colleagues to investigate black holes as potential dark matter candidates based on the theory that these "primordial black holes" would be far more difficult to detect, and could potentially exist in large enough numbers to make up all dark matter. But based on analysis of data captured by the Kepler Mission which launched in March 2009 to hunt for planets in habitable zones around other stars, Griest and his colleagues have detected no sign of primordial black holes.
For four years, Griest and his colleagues monitored roughly 150,000 Kepler stars at a distance of about 3200 light years. If a primordial black hole passed in front of one of these stars, the star would become temporarily brighter because of gravitational lensing. The team sifted through the available Kepler data and turned up no evidence of black holes between 5 and 80 percent of the moon's mass (around 10−3 Earth masses), suggesting these black holes could not constitute most dark matterin the Milky Way.
Primordial black holes, which come out of certain models of the early Universe, have a wide range of possible masses. However, certain black hole masses have already been excluded as the dominant form of dark matter because they would have shown up in astronomical data. The currently viable range for primordial black holes is between 10−2 and 10−7 Earth masses. Researchers had eliminated the chances that black holes that are approximately the mass of the moon could make up dark matter.
However, even smaller primordial black holes could still make up the entirety of dark matter, Griest told SPACE.com. Future space missions — such as the European Space Agency's Euclid spacecraft or NASA's proposed WFIRST satellite — could look for black holes just 0.0001 percent as massive as Earth's moon.
"We've ruled out a range of primordial black holes as dark matter, but have not ruled them out completely," Griest told SPACE.com. "They're still a viable candidate for dark matter."
Supermassive black holes, like one indicated by the blue dot in the NASA X-ray image of the Andromeda Galaxy at the top of the page, are the opposite of the notion of tiny primordial black holes. - Daily Galaxy.
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