Young stars at home in ancient cluster

February 9, 2012
Credit: ESA/Hubble & NASA

(PhysOrg.com) -- Looking like a hoard of gems fit for an emperor's collection, this deep sky object called NGC 6752 is in fact far more worthy of admiration. It is a globular cluster, and at over 10 billion years old is one the most ancient collections of stars known. It has been blazing for well over twice as long as our solar system has existed.

NGC 6752 contains a high number of "blue straggler'' stars, some of which are visible in this image. These stars display characteristics of stars younger than their neighbors, despite models suggesting that most of the stars within should have formed at approximately the same time. Their origin is therefore something of a mystery.

Studies of NGC 6752 may shed light on this situation. It appears that a very high number -- up to 38 percent -- of the stars within its core region are . Collisions between stars in this turbulent area could produce the that are so prevalent.

Lying 13,000 light-years distant, NGC 6752 is far beyond our reach, yet the clarity of Hubble's images brings it tantalizingly close.

Explore further: Even stars get fat -- And 'stellar cannibalism' is the reason

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Tuxford
1 / 5 (4) Feb 09, 2012
In LaViolette's model, these blue stragglers are actually older stars, having grown largely from within over time. Their growth likely accelerates as they grow larger, with higher mass density cores. Thus, their composition could change over time, now appearing 'young'.
yyz
5 / 5 (3) Feb 09, 2012
Most blue straggler stars are thought to form through either collisions between two stars or mass transfer in close binary systems. Studies of several globular clusters have found that BSS formed through collisions tend to predominate in the crowded cores, where the stellar density is the highest and collisions are most likely to occur. BSS that formed through mass transfer are typically found in the less crowded outer halo of the cluster:

http://www.univer...ad-boys/

http://arxiv.org/...20v2.pdf

Both types of blue straggler stars are seen in globular clusters and their spatial distribution might be a clue as to their origin.

Tuxford, why do we only find blue stragglers in star clusters? Why don't they appear throughout the galaxy?
Tuxford
1 / 5 (4) Feb 10, 2012
In LaViolette's model - I believe - the higher mass density inside star clusters would accelerate the growth of stars therein, with the fastest growth generally occurring nearer the central core. Again, the growth is through the emergence of new sub-atomic matter (and thus forming hydrogen) within the core of the star, in this open-system cosmological model. Bluer stars outside the higher mass regions therefore would be far less frequent, though, not non-existent, I would think.
yyz
4 / 5 (4) Feb 10, 2012
"In LaViolette's model - I believe - the higher mass density inside star clusters would accelerate the growth of stars therein, with the fastest growth generally occurring nearer the central core."

Would not the "higher mass density" of the galaxy's "central core", Sag A*, provide the ideal environment for the formation of blue stragglers? Why are no blue stragglers found near Sag A*?

And how exactly does stellar density stimulate the "emergence of new sub-atomic matter...within the core of the star"? Is there an observational test for this?
Tuxford
1 / 5 (4) Feb 13, 2012
Maybe I am wrong, but I recall that there is evidence of younger stars near Sag A? I would guess that with the extreme attraction of the core star, there is insufficient time for these stars to grow into giants, before they are consumed by Sag A via collision.

As for the 'How', I am afraid you will need to study LaViolette's 'Subquantum Kinectics' and/or some General Systems science to get a handle on this. It seems to fall out of the physics model, where the self-sustaining transmutation of various types of 'etherons' (for lack of a better term) - thereby forming a particle of matter - creates a surplus and deficit of the various etheric types nearby. This augments the etheric condition needed for the spontaneous formation of another reaction (another particle of matter) in a random fashion. As LaViolette claims that this condition also refracts light, I suspect this will turn out largely to be what we call dark matter.
Tuxford
1 / 5 (3) Feb 13, 2012
And now dark matter is acknowledged to be everywhere. The presence of matter may enhance the presence of dark matter, as I described. This would explain dark matter halos surrounding galaxies, and galactic clusters.

http://www.physor...ace.html
Tuxford
1 / 5 (3) Feb 15, 2012
And now young blue stars found around an intermediate class core mother star. So this completes the scenario outlined. Likely an intermediate size core star lies in each globular cluster, inspiring the growth of the nearby stars into massive blue giants. But if the core star is supermassive, then likely the young stars are mostly destroyed before they reach the blue giant stage.

http://www.physor...axy.html
Tuxford
1 / 5 (3) Feb 22, 2012
And now a smaller black hole with massive outflows of gas has been discovered. Such expulsions can serve to spawn a cluster of stars eventually. And this black holes appears to be variable, consistent with LaViolette's periodicity predicted for the superwave phenomenon. Larger core stars would have much more massive outflows in his model.

http://www.physor...ole.html

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