Preon star

Preon star

A preon star is a hypothetical compact star made of preons, a group of theoretical subatomic particles that may compose quarks and leptons. Preon stars would be expected to have huge densities, exceeding 1020 g/cm³ — intermediate between quark stars and black holes. A preon star having the same mass as Earth would be about the size of a tennis ball.

Such objects could be detected in principle through gravitational lensing of gamma rays. The presence of preon stars could potentially explain the puzzling observations that lead to the dark matter hypothesis.

Preon stars could originate from supernova explosions or the big bang.

ee also

* compact star
** quark star
** neutron star
** stellar black hole
** Fuzzballs
* degenerate matter
** quark matter
** neutronium
** preon matter

References


*Johan Hansson and Fredrik Sandin, " [http://arxiv.org/abs/astro-ph/0410417 Preon stars: a new class of cosmic compact objects] ". Phys. Lett. B 616, 1 (2005).
*Fredrik Sandin, " [http://epubl.luth.se/1402-1757/2005/25/LTU-LIC-0525-SE.pdf Exotic Phases of Matter in Compact Stars] ". (May 8, 2005) "PDF"
*Johan Hansson, " [http://th-www.if.uj.edu.pl/acta/vol38/pdf/v38p0091.pdf A hierarchy of cosmic compact objects - without black holes] ". Acta Phys.Polon. B38, 91 (2007). "PDF"
*Johan Hansson and Fredrik Sandin, " [http://arxiv.org/abs/astro-ph/0701768 The observational legacy of preon stars - probing new physics beyond the LHC] ".
*J. E. Horvath, " [http://arxiv.org/abs/astro-ph/0702288 Constraints on superdense preon stars and their formation scenarios] ". Astrophys. Space Sci. 307, 419 (2007).
*Fredrik Sandin, " [http://epubl.ltu.se/1402-1544/2007/05/LTU-DT-0705-SE.pdf Exotic Phases of Matter in Compact Stars] ". (2007) "PDF"
*Article in NatureNews : " [http://www.nature.com/news/2007/071130/full/news.2007.292.html Splitting the quark] ". (Nov. 2007)

Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Preon — In particle physics, preons are postulated point like particles, conceived to be subcomponents of quarks and leptons. The word was coined by Jogesh Pati and Abdus Salam in 1974. Interest in preon models peaked in the 1980s but has slowed as some… …   Wikipedia

  • Compact star — In astronomy, the term compact star (sometimes compact object) is used to refer collectively to white dwarfs, neutron stars, other exotic dense stars, and black holes. These objects are all small for their mass. The term compact star is often… …   Wikipedia

  • Etoile à préon — Étoile à préon Une étoile à préon est un type d’étoile compacte hypothétique constituée de préons, un groupe de particules subatomiques elles mêmes hypothétiques. Les étoiles à préon devraient avoir une densité énorme, supérieure à 1023 kg/m3. Il …   Wikipédia en Français

  • Étoile à préon — Une étoile à préon est un type d’étoile compacte hypothétique constituée de préons, un groupe de particules subatomiques elles mêmes hypothétiques. Les étoiles à préon devraient avoir une densité énorme, supérieure à 1023 kg/m3. Il s’agit d’un… …   Wikipédia en Français

  • Neutron star — redirects here. For the story by Larry Niven, see Neutron Star (short story). Neutron stars crush half a million times more mass than Earth into a sphere no larger than Manhattan. A neutron star is a type of stellar remnant that can result from… …   Wikipedia

  • Portal:Star — Shortcut: P:STR The Star Portal Wikipedia portals: Culture Geography Health History …   Wikipedia

  • Exotic star — An exotic star is a compact star composed of something other than electrons, protons, and neutrons, balanced against gravitational collapse by degeneracy pressure. These include strange stars (composed of strange matter) and preon stars (composed …   Wikipedia

  • 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 for quark, but rather, for a conserved… …   Wikipedia

  • Quark star — A quark star or strange star is a hypothetical type of exotic star composed of quark matter, or strange matter. These are ultra dense phases of degenerate matter theorized to form inside particularly massive neutron stars. It is theorized that… …   Wikipedia

  • Degenerate matter — is matter that has such extraordinarily high density that the dominant contribution to its pressure is attributable to the Pauli exclusion principle.[1] The pressure maintained by a body of degenerate matter is called the degeneracy pressure, and …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”