Has Dark Matter Altered the Universe Beyond Recognition?

In the early Universe clumps of dark matter are thought to have attracted gas, which then coalesced into stars that eventually formed the galaxies we see today. In their efforts to understand galaxy formation and evolution, astronomers have spent a good deal of time attempting to simulate the build up of dark matter.

Two astronomers based at the National Autonomous University of Mexico (UNAM) have found a hint of the way dark matter behaves near black holes.

The UNAM astronomers, Dr. Xavier Hernandez and Dr. William Lee, calculated the way in which the black holes millions and billions of times the mass of the Sun found at the center of galaxies absorb dark matter.

The researchers modelled the way in which the dark matter is absorbed by black holes and found that the rate at which this happens is very sensitive to the amount of dark matter found in the black holes’ vicinity. If this concentration were larger than a critical density of seven Suns of matter spread over each cubic light year of space, the black hole mass would increase rapidly, hence engulfing such large amounts of dark matter, that soon the entire galaxy would be altered beyond recognition.

Dr. Hernandez explains, “Over the billions of years since galaxies formed, such runaway absorption of dark matter in black holes would have altered the population of galaxies away from what we actually observe.”

Their work therefore suggests that the density of dark matter in the centers of galaxies tends to a constant value. By comparing their observations to what current models of the evolution of the Universe predict, Hernandez and Lee conclude that it is probably necessary to change some of the assumptions that underpin these models - dark matter may not behave in the way scientists thought it did.

Casey Kazan via materials provided by Royal Astronomical Society.

Comments

[Dan Echegoyen]

BLACK HOLES, EXPANSION, AND DARK ENERGY

In the continuum of space and time, exists the dichotomy of matter and energy. All things exist as both matter and energy, but are experienced as one or the other.
As energy, all things exist as wave patterns. Most wave patterns are interferences of simpler wave patterns. The simplest wave forms are those that do not interfere with other waves. These simplest wave forms hold their shape as they propagate. There are three such wave forms.
The first such wave form is seen in three dimensions as the spherical expansion wave of a bomb blast, and in two dimensions as the circular wave of expansion on the water where a rock was tossed in. The second wave form is seen in three dimensions as the cone of sonic boom following an aircraft traveling faster than sound, and in two dimensions as the V-wake on the water where the boat is traveling faster than the water wave. The third wave form is seen in three dimensions as the propagation torus of a smoke ring and is seen in two dimensions as the double vortexes of an oar stroke on the water.
The Torus is a particle of discrete exchange, from one point to another. The object exchanges position and momentum. While the spherical wave shows position, and the conic wave shows momentum, the torus shows both at the same time, and has a dynamic finite unbounded reality. The volumes of the cone, sphere, and torus are mathematically related as static objects.
The Universe is a local density fluctuation. (a wave pulse) On this local density fluctuation wave, lesser wave forms may exist. All simple wave forms are also local density fluctuations, and as such are indeed universes in their own right, where other waves may exist.
Consider the torus as a universe. Einstein said that gravity is indistinguishable from acceleration. There is both linear acceleration and angular acceleration. Although the torus as a whole travels in a straight line, every local point on the torus travels in a circle and experiences angular acceleration.
The rubber sheet model of gravity and curved space translates directly to the propagating torus with angular acceleration. Acceleration is downward on the rubber sheet and outward on the torus. The tension field that separates the inside of the torus from the outside holds its shape as a simple two dimensional field of space and time just as the rubber sheet does.
Experimentally verifiable is that a big fat slow smoke ring generated in a room with very still air will eventually possess a bulge that travels in a circle on the surface of the smoke ring. This bulge, being a gravitational depression, gathers more of the energy of the field toward itself. Finally the bulge gathers enough material to collapse the field and eject a new, smaller smoke ring out in the same direction as the first torus. This collapse is a black hole to the first torus, and a white hole to the second torus, where the axes of space and time in that second torus have reversed.
While gravity tends to draw depressions together locally on a dynamic torus, even to the point of field collapse, other areas on a torus expand and contract globally as the torus propagates along without regard to local phenomenon on the surface. This is quintessence. The inertia of the torus to propagate is its dark energy. This is a two-dimensional example of the process that we experience in three dimensions.

From structureofexistence.com by Dan Echegoyen 951-204-0201

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Dan Echegoyen
author of StructureOfExistence.com
(951) 204-0201

[Justin]

So is black holes like a giant magnet to all the stars and planets, or are they like a giant swirl of liquid keeping the stars and planets in orbit?

[Classified]

Maybe there is a giant black hole at the center of the universe that everything is spinning around (and would account for the missing dark matter).