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Study plunges standard Theory of Cosmology into Crisis
05-07-2009, 12:06 AM,
#1
Study plunges standard Theory of Cosmology into Crisis
Study plunges standard Theory of Cosmology into Crisis
http://www.physorg. com/news16072628 2.html
May 5th, 2009

As modern cosmologists rely more and more on the ominous “dark matter”
to explain otherwise inexplicable observations, much effort has gone
into the detection of this mysterious substance in the last two
decades, yet no direct proof could be found that it actually exists.
Even if it does exist, dark matter would be unable to reconcile all
the current discrepancies between actual measurements and predictions
based on theoretical models. Hence the number of physicists
questioning the existence of dark matter has been increasing for some
time now.

Competing theories of gravitation have already been developed which
are independent of this construction. Their only problem is that they
conflict with Newton’s theory of gravitation.

“Maybe Newton was indeed wrong”, declares Professor Dr. Pavel Kroupa
of Bonn University's Argelander-Institut für Astronomie (AIfA).
“Although his theory does, in fact, describe the everyday effects of
gravity on Earth, things we can see and measure, it is conceivable
that we have completely failed to comprehend the actual physics
underlying the force of gravity”.

This is a problematical hypothesis that has nevertheless gained
increasing ground in recent years, especially in Europe.

Two new studies could well lend further support to it. In these
studies, Professor Kroupa and his former colleague Dr. Manuel Metz,
working in collaboration with Professor Dr. Gerhard Hensler and Dr.
Christian Theis from the University of Vienna, and Dr. Helmut Jerjen
from the Australian National University, Canberra, have examined
so-called “satellite galaxies”. This term is used for dwarf galaxy
companions of the Milky Way, some of which contain only a few thousand
stars.

According to the best cosmological models, they exist presumably in
hundreds around most of the major galaxies. Up to now, however, only
30 such satellites have been observed around the Milky Way, a
discrepancy in numbers which is commonly attributed to the fact that
the light emitted from the majority of satellite galaxies is so faint
they remain invisible.

A detailed study of these stellar agglomerates has revealed some
astonishing phenomena: “First of all, there is something unusual about
their distribution” , Professor Kroupa explains, “the satellites should
be uniformly arranged around their mother galaxy, but this is not what
we found“. More precisely, all classical satellites of the Milky Way
- the eleven brightest dwarf galaxies - lie more or less in the same
plane, they are forming some sort of a disc in the sky. The research
team has also been able to show that most of these satellite galaxies
rotate in the same direction around the Milky Way - like the planets
revolve around the Sun.

Contradiction upon Contradiction

The physicists do belief that this phenomenon can only be explained if
the satellites were created a long time ago through collisions between
younger galaxies. “The fragments produced by such an event can form
rotating dwarf galaxies”, explains Dr. Metz, who has recently moved
across to the Deutsches Zentrum für Luft- und Raumfahrt (German
Aero-space Center). But there is an interesting catch to this crash
theory, “theoretical calculations tell us that the satellites created
cannot contain any dark matter”. This assumption, however, stands in
contradiction to another observation. “The stars in the satellites we
have observed are moving much faster than predicted by the
Gravitational Law. If classical physics holds this can only be
attributed to the presence of dark matter”, Manuel Metz states.

Or one must assume that some basic fundamental principles of physics
have hitherto been incorrectly understood. “The only solution would be
to reject Newton´s classical theory of gravitation”, says Pavel
Kroupa. “We probably live in a non-Newton universe. If this is true,
then our observations could be explained without dark matter”. Such
approaches are finding support amongst other research teams in Europe,
too.

It would not be the first time that Newton’s theory of gravitation had
to be modified over the past hundred years. This became necessary in
three special cases: when high velocities are involved (through the
Special Theory of Relativity), in the proximity of large masses
(through the theory of General Relativity), and on sub-atomic scales
(through quantum mechanics).

The deviations detected in the satellite galaxy data support the
hypothesis that in space where extremely weak accelerations
predominate, a “modified Newton dynamic” must be adopted. This
conclusion has far-reaching consequences for fundamental physics in
general, and also for cosmological theories. ¬¬Famous astrophysicist
Bob Sanders from the University of Groningen declares: "The authors
of this paper make a strong argument. Their result is entirely
consistent with the expectations of modified Newtonian dynamics
(MOND), but completely opposite to the predictions of the dark matter
hypothesis. Rarely is an observational test so definite."

More information:

Metz, Manuel; Kroupa, Pavel; Theis, Christian; Hensler, Gerhard;
Jerjen, Helmut: Did the Milky Way dwarf satellites enter the halo as a
group? (The Astrophysical Journal 2009; doi:
10.1088/0004- 637X/697/ 1/269)

Metz, Manuel; Kroupa, Pavel; Jerjen, Helmut: Discs of Satellites: the
new dwarf spheroidals (Monthly Notices of the Royal Astronomical
Society 2009; doi: 10.1111/j.1365- 2966.2009. 14489.x)
Source: Bonn University
Reply
05-07-2009, 10:21 AM,
#2
Study plunges standard Theory of Cosmology into Crisis
Fantastic stuff!! :)

Thanks very much for posting this nik.

For years now I've had my doubts about the theory of dark matter and the frequent discrepancies between observation and said theory.

Along with this, I'm really doubting Super-String theory with its complete lack of supporting evidence, but that is definately for another thread!!

“Anyone who thinks the LHC will destroy the world is a twat.” - Professor Brian Cox.
Reply
05-07-2009, 10:28 PM,
#3
Study plunges standard Theory of Cosmology into Crisis
You're welcome.
Reply
05-09-2009, 07:24 AM, (This post was last modified: 05-09-2009, 07:25 AM by rsol.)
#4
Study plunges standard Theory of Cosmology into Crisis
they maybe starting to understand that matter effects space-time. the whole "dark matter" thing, i feel, is merely the fact that the calculations are not taking into account a great many things of which we simply dont know. Im guessing this is an artefact of relying on classic calculations that really only apply to this part of space/this planet. Its like thinking the earth is flat and making up your world to match this paradigm.
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