What is a partial quark star?

[ChromeStar]

What is a partial quark star? :huh:

Can anyone help?

Thanx in Advance

[antoniseb]

Originally posted by ChromeStar@Jan 30 2005, 03:45 PM
What is a partial quark star?

Hi ChromeStar, I don't know what you know and don't know about this stuff, so if I shoot too low, I apologise.

Briefly a Partial Quark Star is a heavy neutron star that has, in its core, matter under so much pressure that the neutrons have dissociated, and the core is made of free quarks.

Quarks, as you may know, are thought to be the building blocks of protons, neutrons, pions, and many other subatomic particles [but not electrons, muons, tauons, and neutrinos]. We don't see a lot of free quarks, because they are very strongly bound together [assuming they exist].

At the moment, we do not know much about this exotic state of matter. Some people have hypothesized that it would be a superfluid, and might have some special properties related to the electricity and magnetism of the outward object. In any case we may or may not have observed neutron stars that could be in this state. It is a matter for debate. The thought is that this quark "Strange Matter" would be denser than neutron star material, and so a neutron star of a given mass would have a smaller radius if it contained this stuff, and could therefore spin faster, and perhaps hold a more intense magnetic field [like the magnetars mentioned in a recent UT article].

[ChromeStar]

So it would be a Nuetron Star inbetween a Singualrity(blackhole) and "Normal" Nuetron Star.

What holds Quarks together i.e. nuclear strong in Subatomic particles?

P.s. Thanx Anton

[antoniseb]

Originally posted by ChromeStar@Jan 30 2005, 04:07 PM
What holds Quarks together i.e. nuclear strong in Subatomic particles?

If you really want to get into quarks, I'd suggest finding a good website that describes them. There's a lot there.

[John L]

Originally posted by ChromeStar@Jan 30 2005, 10:07 AM
So it would be a Nuetron Star inbetween a Singualrity(blackhole) and "Normal" Nuetron Star.

What holds Quarks together i.e. nuclear strong in Subatomic particles?

P.s. Thanx Anton

Gluons hold quarks together. Gluons are the carrier of the strong nuclear force and hold the quarks together to form the various normal and exotic subatomic particles.

As for the various phases between a neutron star and a blck hole, this is mostly theoretical, but what you stated is right. These partial, and even full, quark stars are those stellar cores that just slightly too light to undergo complete gravitational collapse into a black hole.

[mikefreeman]

hi

if 'partial quark stars' are inbetween neutron stars (pulsars) and black holes, then around the galaxy there must be a fairly wide scale of varying densities

lightweight partial quark stars thru' to heavy partial quark stars

can anyone speculate as to what differences in appearance or in other characteristics they'll exhibit as you move across the scale

maybe the lighter or bigger ones spin more slowly
maybe the heavier or smaller ones spin faster

this takes me back to my point that a small amount of matter falling into a neitron star that's not quite massive enough to be a partial quark star can take it over the threshold and thus it would become one and at the other end of the scale additional matter could tip a partial quark star into black hole oblivion

maybe we should look out for pulsars (by any definition, potential 'partial quark stars&#39 that dissappear - maybe the smallest, fastest spinning ones are the best candidates

maybe I've got it the wrong way round

Mike

[antoniseb]

Originally posted by mikefreeman@Feb 1 2005, 08:03 AM
maybe we should look out for pulsars (by any definition, potential 'partial quark stars&#39 that dissappear - maybe the smallest, fastest spinning ones are the best candidates

Outwardly a quark-star will look just like a neutron star, and they do not need to be spinning extra fast, it's just that they can.

You are correct that if there is a neutron star accreting matter, eventually, it will start having strange quark matter in its core, and will collapse a little bit, and spin up.

At the moment, I think we are a long way from being able to learn much about them or from them even if we do discover that some neutron stars are in this category [which is still not certain].

[zephyr46]

For the beginer

Quarks

APOD candidate Quark Star



For the advanced reader

Oh and if anyone has read anything about the 'fermion ball' that was a theory of Sag A* I would be most interested to read it

[mas_to]

so (corect me if i'm wrong) a neutron star is when the electromagtenic force overwhelmed by gravity pressure, electron combined with proton to form "all neutron" star. and if strong force overwhelmed by gravity we have "all quark" star. and when gravity overwhelmed every thing we get a blackhole that no one could imagine whats in it.