More doubts about a repulsive "dark energy" arise every day. In a new paper accepted by Physical Review D, Christos Tsagas of Aristotle University in Greece suggests that apparent acceleration of the universe could be an illusion. The cause would be our galaxy being part of a "dark flow". Such a flow would make expansion of the universe appear nonuniform, creating the illusion of acceleration. The paper builds on work by Alexander Kashlinsky here in NASA Goddard Space Flight Center.
This blog reported Kashlinsky's work back in September 2008, Going With the Flow. That year Kashlinsky reported that clusters of galaxies, including our Milky Way, appear to be moving at 600 km/sec toward some unseen attractor. What kind of enormous object could cause this flow is unknown, but it could be a super-sized ultra massive Black Hole. Old models of cosmology can not even account for the Black Holes within galaxies. Such immensely massive objects, along with the illusion of acceleration, are predicted by GM=tc^3 and a changing speed of light.
Showing posts with label black holes. Show all posts
Showing posts with label black holes. Show all posts
Saturday, October 1, 2011
Friday, September 9, 2011
Black Holes Are Dark
The above statement points to an obvious solution of the "dark matter" mystery. Since the work of Fritz Zwicky in the 1930's and Vera Rubin in the 1950's, astronomers have suspected that galaxies contain hidden mass. Something that is dark but has gravitational attraction is a perfect description of Black Holes, billions of them populating the galactic halo. Yet physicists tend to ignore Black Holes as "dark matter" candidates, preferring to search for exotic particles like neutralinos and WIMPS. None of these speculated particles has ever been found. Scientists from a particle physics background would prefer if the answer was in their exotic particles.
The August 23 issue of NEW SCIENTIST contains an interesting article:
Is the Universe Made of Holes?
"MOST of the matter in the universe gives out no light, or at least so little that it is currently undetectable. Yet we know it is out there because its gravity keeps stars and galaxies in their orbits. Pretty much everyone thinks that this so-called dark matter is made of hitherto undiscovered subatomic particles. Physicists are hopeful they will find a candidate in high-speed collisions at the Large Hadron Collider at CERN, near Geneva, Switzerland.
"But could we have got dark matter all wrong? Mike Hawkins thinks so. He believes that rather than particles, what we call dark matter is actually legions of black holes created shortly after the big bang."
Because the speed of light was once much faster, primordial singularities could have formed with a variety of masses. Mathematics predicts
that 23.87% of mass will have collapsed into ringularities, surrounding the galaxies in haloes of dark mass. Some of these primordial Black Holes could exist in our solar system, even within Earth's core. The solution to this dark mystery may be beneath our feet.
The August 23 issue of NEW SCIENTIST contains an interesting article:
Is the Universe Made of Holes?
"MOST of the matter in the universe gives out no light, or at least so little that it is currently undetectable. Yet we know it is out there because its gravity keeps stars and galaxies in their orbits. Pretty much everyone thinks that this so-called dark matter is made of hitherto undiscovered subatomic particles. Physicists are hopeful they will find a candidate in high-speed collisions at the Large Hadron Collider at CERN, near Geneva, Switzerland.
"But could we have got dark matter all wrong? Mike Hawkins thinks so. He believes that rather than particles, what we call dark matter is actually legions of black holes created shortly after the big bang."
Because the speed of light was once much faster, primordial singularities could have formed with a variety of masses. Mathematics predicts
that 23.87% of mass will have collapsed into ringularities, surrounding the galaxies in haloes of dark mass. Some of these primordial Black Holes could exist in our solar system, even within Earth's core. The solution to this dark mystery may be beneath our feet.
Sunday, August 14, 2011
The Farthest Quasar
In the June 30 issue of NATURE, astronomers report discovery of the most distant quasar ever found. Once these enormously bright lights were called quasi stellar objects because scientists had no idea how distant or bright they really are. ULAS J1120+0641 dates from a time 12.9 billion years ago, about 770 million years after the Big Bang. This quasar emits 60 trillion times as much light as our Sun! It is powered by a Black Hole of 2 billion solar masses.
Dating from a time when few stars existed, this quasar is far too old to have formed from a collapsing star. It's central Black Hole must have formed from direct collapse shortly after the Big Bang. Size of a primordial Black Hole is related to the speed of light. Discovery of this massively powerful quasar is one more bit of evidence that c was much faster in the early Universe.
Dating from a time when few stars existed, this quasar is far too old to have formed from a collapsing star. It's central Black Hole must have formed from direct collapse shortly after the Big Bang. Size of a primordial Black Hole is related to the speed of light. Discovery of this massively powerful quasar is one more bit of evidence that c was much faster in the early Universe.
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