Hawking star

A Hawking star is a theoretical type of star, where the star's core contains a very small, substellar, primordial black hole, and is partially or completely powered by energy from matter accreting into the black hole, rather than stellar fusion. It is named for Stephen Hawking, who proposed the existence of primordial black holes.^[1]^[2]^[3]

The existence and frequency of Hawking stars would be a test for the existence of primordial black holes and their commonality, and test their candidacy as a form of dark matter.^[2]^[3]

These stars are theorized to exist in the contemporary universe,^[2]^[3] unlike a similar type of stars from the early universe, quasi-stars, where very large gas clouds directly collapse into black holes surrounded by star's envelope, also powered by black hole accretion.^[4] Unlike the primordial quasi-stars, Hawking stars would be the size of contemporary stars, whereas quasi-stars would be incredibly massive.^[2]^[3]

References

^ Max Planck Society (22 December 2023). "What happens if you put a black hole into the sun?". phys.org.
^ ^a ^b ^c ^d Adam Mann (13 December 2023). "Are tiny black holes hiding within giant stars?". Science. Vol. 382, no. 6676. doi:10.1126/science.zckalbq.
^ ^a ^b ^c ^d Dave Malyon (16 December 2023). "Tiny Black Holes Proposed As Dark Matter: Consumes Stars From The Inside Out With 'Observable Consequences'". KNEWZ.
^ E. Alderson (15 May 2020). "Quasi-Stars: Black Holes at the Core of the Universe's Largest Stars". Medium. 38bfbc4e1b95.

External links

What If There's A Black Hole Inside The Sun? | Hawking Stars. Space Time. PBS. 20 December 2023. Q6kJaMf3Lgo on YouTube.

v t e Black holes
Outline
Types	BTZ black hole Schwarzschild Rotating Charged Virtual Kugelblitz Supermassive Primordial Direct collapse Rogue Malament–Hogarth spacetime
Size	Micro Extremal Electron Hawking star Stellar Microquasar Intermediate-mass Supermassive Active galactic nucleus Quasar LQG Blazar OVV Radio-Quiet Radio-Loud
Formation	Stellar evolution Gravitational collapse Neutron star Related links Tolman–Oppenheimer–Volkoff limit White dwarf Related links Supernova Micronova Hypernova Related links Gamma-ray burst Binary black hole Quark star Supermassive star Quasi-star Supermassive dark star X-ray binary
Properties	Astrophysical jet 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 Microlens Bondi accretion M–sigma relation Quasi-periodic oscillation Thermodynamics Bekenstein bound Bousso's holographic bound 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 Black Hole Initiative Black hole starship Big Bang Big Bounce Compact star Exotic star Quark star Preon star Gravitational waves Gamma-ray burst progenitors Gravity well Hypercompact stellar system Membrane paradigm Naked singularity Population III star Supermassive star Quasi-star Supermassive dark star Rossi X-ray Timing Explorer Superluminal motion Timeline of black hole physics White hole Wormhole Tidal disruption event Planet Nine
Notable	Cygnus X-1 XTE J1650-500 XTE J1118+480 A0620-00 SDSS J150243.09+111557.3 Sagittarius A* Centaurus A Phoenix Cluster PKS 1302-102 OJ 287 SDSS J0849+1114 TON 618 MS 0735.6+7421 NeVe 1 Hercules A 3C 273 Q0906+6930 Markarian 501 ULAS J1342+0928 PSO J030947.49+271757.31 P172+18
Category Commons

Stars

List

Formation

Evolution

Classification

Early Late Main sequence O B A F G K M Subdwarf O B WR OB Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red Yellow Hypergiant Yellow Carbon S CN CH White dwarf Chemically peculiar Am Ap/Bp CEMP HgMn He-weak Barium Lambda Boötis Lead Technetium Be Shell B[e] Helium Extreme Blue straggler
Remnants	Compact star Parker's star White dwarf Helium planet 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 hole star Black Hawking Quasi-star Gravastar Thorne–Żytkow object Iron Blitzar White hole

Nucleosynthesis

Structure

Properties

Star systems

Earth-centric
observations

Lists

Stephen Hawking

Physics

Books

Science	The Large Scale Structure of Space–Time (1973) A Brief History of Time (1988) Black Holes and Baby Universes and Other Essays (1993) The Nature of Space and Time (1996) The Universe in a Nutshell (2001) On the Shoulders of Giants (2002) A Briefer History of Time (2005) God Created the Integers (2005) The Grand Design (2010) The Dreams That Stuff Is Made Of (2011) Brief Answers to the Big Questions (2018) On the Origin of Time (2023, posthume message)
Fiction	George's Secret Key to the Universe (2007) George's Cosmic Treasure Hunt (2009) George and the Big Bang (2011) George and the Unbreakable Code (2014) George and the Blue Moon (2016) Unlocking the Universe (2020)
Memoirs	My Brief History (2013)