- Q star
A Q-Star, also known as a "Gray hole", is hypothetical type of a compact, heavy neutron star with an exotic state of matter. The term Q-Star should not be mistaken for
Quark star , as the Q does not stand forquark , but rather, for a conserved particle number. A Q-Star may be mistaken for astellar black hole . One such candidate is the compact object inV404 Cyg .Types of Q-stars
* SUSY Q-ball [http://xxx.lanl.gov/abs/hep-ph/0612159 Properties and signatures of supersymmetric Q-balls] , Alexander Kusenko, 2006]
* B-ball, stable Q-balls with a large baryon number B. They exist inneutron stars that have absorbed Q-ball(s).ee also
*
Black hole
**Stellar black hole
*Exotic star
**Preon star
**Quark star Reference
External links
* [http://arxiv.org/abs/astro-ph/9708065 Abstract, Are Q-stars a serious threat for stellar-mass black hole candidates?] , Miller J.C., Shahbaz T., Nolan L.A, 1997
* [http://arxiv.org/abs/astro-ph/0207270 Abstract, No observational proof of the black-hole event-horizon] , Marek A. Abramowicz, Wlodek Kluzniak, Jean-Pierre Lasota, 2002
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