Q star

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, but not all light, cannot escape.^{[citation needed]} The Q stands for a conserved particle number. A Q-Star may be mistaken for a stellar black hole.

Types of Q-stars[]

SUSY Q-ball^[1]
B-ball, stable Q-balls with a large baryon number B. They may exist in neutron stars that have absorbed Q-ball(s).^[1]

References[]

^ Jump up to: ^a ^b Kusenko, Alexander (2006). "Properties and signatures of supersymmetric Q-balls". arXiv:hep-ph/0612159.

External links[]

Abstract, Are Q-stars a serious threat for stellar-mass black hole candidates?, Miller J.C., Shahbaz T., Nolan L.A, 1997
Abstract, No observational proof of the black-hole event-horizon, Marek A. Abramowicz, Wlodek Kluzniak, Jean-Pierre Lasota, 2002

v t Black holes
Types	BTZ black hole Schwarzschild Rotating Charged Virtual Kugelblitz Supermassive Primordial
Size	Micro Extremal Electron Stellar Microquasar Intermediate-mass Supermassive Active galactic nucleus Quasar Blazar
Formation	Stellar evolution Gravitational collapse Neutron star Related links Tolman–Oppenheimer–Volkoff limit White dwarf Related links Supernova Related links Hypernova Gamma-ray burst Binary black hole
Properties	Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek process Accretion disk Hawking radiation Gravitational lens Bondi accretion M–sigma relation Quasi-periodic oscillation Thermodynamics Immirzi parameter Schwarzschild radius Spaghettification
Issues	Black hole complementarity Information paradox Cosmic censorship ER = EPR Final parsec problem Firewall (physics) Holographic principle No-hair theorem
Metrics	Schwarzschild (Derivation) Kerr Reissner–Nordström Kerr–Newman Hayward
Alternatives	Nonsingular black hole models Black star Dark star Dark-energy star Gravastar Magnetospheric eternally collapsing object Planck star Q star Fuzzball
Analogs	Optical black hole Sonic black hole
Lists	Black holes Most massive Nearest Quasars Microquasars
Related	Outline of black holes Sonic black hole Black Hole Initiative Black hole starship Compact star Exotic star Quark star Preon star Gamma-ray burst progenitors Gravity well Hypercompact stellar system Membrane paradigm Naked singularity Quasi-star Rossi X-ray Timing Explorer Timeline of black hole physics White hole Wormhole
Category Commons

v t Stars
Formation	Accretion Molecular cloud Bok globule Young stellar object Protostar Pre-main-sequence Herbig Ae/Be T Tauri FU Orionis Herbig–Haro object Hayashi track Henyey track
Evolution	Main sequence Red-giant branch Horizontal branch Red clump Asymptotic giant branch super-AGB Blue loop Protoplanetary nebula Planetary nebula PG1159 Dredge-up OH/IR Instability strip Luminous blue variable Blue straggler Stellar population Supernova Superluminous supernova / Hypernova
Spectral classification	Early Late Main sequence O B A F G K M Brown dwarf WR OB Subdwarf O B Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red Yellow Hypergiant Yellow Carbon S CN CH White dwarf Chemically peculiar Am Ap/Bp HgMn Helium-weak Barium Extreme helium Lambda Boötis Lead Technetium Be Shell B[e]
Remnants	Compact star White dwarf Helium planet Black dwarf Neutron Radio-quiet Pulsar Binary X-ray Magnetar Stellar black hole X-ray binary Burster SGR
Hypothetical	Blue dwarf Green Black dwarf Exotic Boson Electroweak Strange Preon Planck Dark Dark-energy Quark Q Black Gravastar Quasi-star Thorne–Żytkow object Iron Blitzar White hole Planck star
Stellar nucleosynthesis	Deuterium burning Lithium burning Proton–proton chain CNO cycle Helium flash Triple-alpha process Alpha process Carbon burning Neon burning Oxygen burning Silicon burning S-process R-process Fusor Nova Symbiotic Remnant Luminous red nova
Structure	Core Convection zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Stellar wind Bubble Bipolar outflow Accretion disk Asteroseismology Helioseismology Eddington luminosity Kelvin–Helmholtz mechanism
Properties	Designation Dynamics Effective temperature Luminosity Kinematics Magnetic field Absolute magnitude Mass Metallicity Rotation Starlight Variable Photometric system Color index Hertzsprung–Russell diagram Color–color diagram
Star systems	Binary Contact Common envelope Eclipsing Symbiotic Multiple Cluster Open Globular Super Planetary system
Earth-centric observations	Sun Solar radio emission Solar System Sunlight Pole star Circumpolar Constellation Asterism Magnitude Apparent Extinction Photographic Radial velocity Proper motion Parallax Photometric-standard
Lists	Proper names Arabic Chinese Extremes Most massive Highest temperature Lowest temperature Largest volume Smallest volume Brightest Historical brightest Most luminous Nearest Nearest bright With exoplanets Brown dwarfs White dwarfs Milky Way novae Supernovae Candidates Remnants Planetary nebulae Timeline of stellar astronomy
Related	Substellar object Brown dwarf Sub-brown dwarf Planet Galactic year Galaxy Guest Gravity Intergalactic Planet-hosting stars Tidal disruption event
Category:Stars · Stars portal

v t Supernovae
Classes	Type Ia Type Iax Type Ib and Ic Type II (IIP, IIL, IIn, and IIb) Hypernova Superluminous Pair-instability
Physics of	Calcium-rich Carbon detonation Foe/Bethe Near-Earth Phillips relationship Nucleosynthesis P-process R-process Neutrinos
Related	Imposter pulsational pair-instability Failed Gamma-ray burst Gravitational wave Fast radio burst Kilonova Luminous red nova Nova Pulsar kick Quark-nova Symbiotic nova
Progenitors	Hypergiant yellow Luminous blue variable Supergiant blue red yellow White dwarf related links Wolf–Rayet star
Remnants	Supernova remnant Pulsar wind nebula Neutron star pulsar magnetar related links Stellar black hole related links Compact star quark star exotic star Zombie star Local Bubble Superbubble Orion–Eridanus
Discovery	Guest star History of supernova observation Timeline of white dwarfs, neutron stars, and supernovae
Lists	Candidates Notable Massive stars Most distant Remnants In fiction
Notable	Barnard's Loop Cassiopeia A Crab Crab Nebula iPTF14hls Tycho's Kepler's SN 1987A SN 185 SN 1006 SN 2003fg Remnant G1.9+0.3 SN 2007bi SN 2011fe SN 2014J SN Refsdal Vela Remnant SN 2006gy ASASSN-15lh SN 2016aps
Research	ASAS-SN Calán/Tololo Survey High-Z Supernova Search Team Katzman Automatic Imaging Telescope Monte Agliale Supernovae and Asteroid Survey Nearby Supernova Factory Sloan Supernova Survey Supernova/Acceleration Probe Supernova Cosmology Project SuperNova Early Warning System Supernova Legacy Survey Texas Supernova Search
Category:Supernovae Commons:Supernovae

Q star

Contents

Types of Q-stars[]

See also[]

References[]

External links[]