Q star explained

A Q-star, also known as a grey hole, is a hypothetical type of a compact, heavy neutron star with an exotic state of matter. Such a star can be smaller than the progenitor star's Schwarzschild radius and have a gravitational pull so strong that some light, but not all photons, can escape. The Q stands for a conserved particle number. A Q-star may be mistaken for a stellar black hole.^[1]

Types of Q-stars

• Q-ball^[2]
• B-ball, stable Q-balls with a large baryon number B. They may exist in neutron stars that have absorbed Q-ball(s).

See also

• Black hole
  • Stellar black hole
• Compact star
  • Exotic star
    • Boson star
    • Electroweak star
    • Preon star
    • Strange star
    • Quark star

Further reading

• 10.1051/0004-6361:20021645 . No observational proof of the black-hole event-horizon . 2002 . Abramowicz . M. A. . Kluźniak . W. . Lasota . J.-P. . Astronomy & Astrophysics . 396 . 3 . L31–L34 . astro-ph/0207270 . 2002A&A...396L..31A . 9771972 .

Notes and References

1. • 10.1046/j.1365-8711.1998.01384.x . Are Q-stars a serious threat for stellar-mass black hole candidates? . 1998 . Miller . J. C. . Shahbaz . T. . Nolan . L. A. . Monthly Notices of the Royal Astronomical Society . 294 . 2 . L25–L29 . free . astro-ph/9708065 . 1998MNRAS.294L..25M .
2. workshop on Exotic Physics with Neutrino Telescopes . Uppsala, Sweden . 2006hep.ph...12159K . Properties and signatures of supersymmetric Q-balls . Kusenko . Alexander . 2006 . hep-ph/0612159 .