Since quarks have been discovered wouldnt' it follow that quark stars should be a possibility? following white dwarf an neutron stars?

Does anyone know the escape velocity of a neutron star relative to the speed of light? Would an event horizon form before a star could collapse past the neutron star configuration into the quark star type? Or would we have to be dealing with a particles close to the Plank size before the EH begins to form?
wet1?
James R?
eberacum45?
any comments?

Quark stars are a possibility-
see-
http://curious.astro.cornell.edu/question.php?number=445
and
http://www.physicspost.com/articles.php?articleId=76&page=1
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there are very few candidates, however- it seems they only form if the exploding/imploding star is a very narrow range of masses- around 3Xsolar - any more than that and a black hole would form.

You could add mass to a neutron star, perhaps from a companion star , and it would possibly go through a quark star phase before forming a black hole.
Escape velocity of a neutron star is about 0.5c, by the way...

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awesome!, thanks eburacum45

Good place to mine quarktronium or strong matter (scifi people love this stuff as a power source) but in reality at several million kg per cubic micrometer I don't know how you would get the stuff off the quark star and store or move it!

Neutron stars and hypothetical quark stars don't have an event horzion.

Taking a neutron star of 1.4M and a radius of 10km

v = (2GM/r)^1/2


So therefore the escape velocity is rougly 2/3 c