Timeline of black hole physics

Pre-20th century

1640 — Ismaël Bullialdus suggests an inverse-square gravitational force law

1676 — Ole Rømer demonstrates that light has a finite speed

1684 — Isaac Newton writes down his inverse-square law of universal gravitation

1758 — Rudjer Josip Boscovich develops his theory of forces, where gravity can be repulsive on small distances. So according to him strange classical bodies, such as white holes, can exist, which won't allow other bodies to reach their surfaces

1784 — John Michell discusses classical bodies which have escape velocities greater than the speed of light

1795 — Pierre Laplace discusses classical bodies which have escape velocities greater than the speed of light

1798 — Henry Cavendish measures the gravitational constant G

1876 — William Kingdon Clifford suggests that the motion of matter may be due to changes in the geometry of space

20th century

1909 — Albert Einstein, together with Marcel Grossmann, starts to develop a theory which would bind metric tensor gik, which defines a space geometry, with a source of gravity, that is with mass

1910 — Hans Reissner and Gunnar Nordström defines Reissner–Nordström singularity, Hermann Weyl solves special case for a point-body source

1915 — Albert Einstein presents (David Hilbert has presented this independently five days earlier in Göttingen) the complete Einstein field equations at the Prussian Academy meeting in Berlin on 25 November 1915[1]

1916 — Karl Schwarzschild solves the Einstein vacuum field equations for uncharged spherically-symmetric non-rotating systems

1917 — Paul Ehrenfest gives conditional principle a three-dimensional space

1918 — Hans Reissner and Gunnar Nordström solve the Einstein–Maxwell field equations for charged spherically-symmetric non-rotating systems

1918 — Friedrich Kottler gets Schwarzschild solution without Einstein vacuum field equations

1923 — George David Birkhoff proves that the Schwarzschild spacetime geometry is the unique spherically symmetric solution of the Einstein vacuum field equations

1931 — Subrahmanyan Chandrasekhar calculates, using special relativity, that a non-rotating body of electron-degenerate matter above a certain limiting mass (at 1.4 solar masses) has no stable solutions

1939 — Robert Oppenheimer and Hartland Snyder calculate the gravitational collapse of a pressure-free homogeneous fluid sphere into a black hole

1958 — David Finkelstein theorises that the Schwarzschild radius is a causality barrier: an event horizon of a black hole

1963 — Roy Kerr solves the Einstein vacuum field equations for uncharged symmetric rotating systems, deriving the Kerr metric for a rotating black hole

1963 — Maarten Schmidt discovers and analyzes the first quasar, 3C 273, as a highly red-shifted active galactic nucleus, a billion light years away

1964 — Roger Penrose proves that an imploding star will necessarily produce a singularity once it has formed an event horizon

1964 — Yakov Zel’dovich and independently Edwin Salpeter propose that accretion discs around supermassive black holes are responsible for the huge amounts of energy radiated by quasars[1]

1964 — Hong-Yee Chiu coins the word quasar for a 'quasi-stellar radio source' in his article in Physics Today

1964 — The first recorded use of the term "black hole", by journalist Ann Ewing

1965 — Ezra T. Newman, E. Couch, K. Chinnapared, A. Exton, A. Prakash, and Robert Torrence solve the Einstein–Maxwell field equations for charged rotating systems

1966 — Yakov Zel’dovich and Igor Novikov propose searching for black hole candidates among binary systems in which one star is optically bright and X-ray dark and the other optically dark but X-ray bright (the black hole candidate)[1]

1967 — Jocelyn Bell discovers and analyzes the first radio pulsar, direct evidence for a neutron star[2]

1967 — Werner Israel presents the proof of the no-hair theorem at King's College London

1967 — John Wheeler introduces the term "black hole" in his lecture to the American Association for the Advancement of Science[1]

1968 — Brandon Carter uses Hamilton–Jacobi theory to derive first-order equations of motion for a charged particle moving in the external fields of a Kerr–Newman black hole

1969 — Roger Penrose discusses the Penrose process for the extraction of the spin energy from a Kerr black hole

1969 — Roger Penrose proposes the cosmic censorship hypothesis

1972 — Identification of Cygnus X-1/HDE 226868 from dynamic observations as the first binary with a stellar black hole candidate

1972 — Stephen Hawking proves that the area of a classical black hole's event horizon cannot decrease

1972 — James Bardeen, Brandon Carter, and Stephen Hawking propose four laws of black hole mechanics in analogy with the laws of thermodynamics

1972 — Jacob Bekenstein suggests that black holes have an entropy proportional to their surface area due to information loss effects

1974 — Stephen Hawking applies quantum field theory to black hole spacetimes and shows that black holes will radiate particles with a black-body spectrum which can cause black hole evaporation

1975 — James Bardeen and Jacobus Petterson show that the swirl of spacetime around a spinning black hole can act as a gyroscope stabilizing the orientation of the accretion disc and jets[1]

1989 — Identification of microquasar V404 Cygni as a binary black hole candidate system

1994 — Charles Townes and colleagues observe ionized neon gas swirling around the center of our Galaxy at such high velocities that a possible black hole mass at the very center must be approximately equal to that of 3 million suns[3]

21st century

2002 — Astronomers at the Max Planck Institute for Extraterrestrial Physics present evidence for the hypothesis that Sagittarius A* is a supermassive black hole at the center of the Milky Way galaxy

2002 — NASA's Chandra X-ray Observatory identifies double galactic black holes system in merging galaxies NGC 6240

2004 — Further observations by a team from UCLA present even stronger evidence supporting Sagittarius A* as a black hole

2006 — The Event Horizon Telescope begins capturing data

2012 — First visual evidence of black-holes: Suvi Gezari's team in Johns Hopkins University, using the Hawaiian telescope Pan-STARRS 1, publish images of a supermassive black hole 2.7 million light-years away swallowing a red giant[4]

2015 — LIGO Scientific Collaboration detects the distinctive gravitational waveforms from a binary black hole merging into a final black hole, yielding the basic parameters (e.g., distance, mass, and spin) of the three spinning black holes involved

2019 — Event Horizon Telescope collaboration released the first direct photo of a black hole, the supermassive M87* at the core of the Messier 87 galaxy

References

Thorne, Kip S. (1994). Black holes and time warps : Einstein's outrageous legacy. New York. ISBN 0393035050. OCLC 28147932.

Ferrarese, Laura; Ford, Holland (February 2005). "Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research". Space Science Reviews. 116 (3–4): 523–624. arXiv:astro-ph/0411247. Bibcode:2005SSRv..116..523F. doi:10.1007/s11214-005-3947-6. S2CID 119091861. "it is fair to say that the single most influential event contributing to the acceptance of black holes was the 1967 discovery of pulsars by graduate student Jocelyn Bell. The clear evidence of the existence of neutron stars – which had been viewed with much skepticism until then – combined with the presence of a critical mass above which stability cannot be achieved, made the existence of stellar-mass black holes inescapable."

Genzel, R; Hollenbach, D; Townes, C H (1994-05-01). "The nucleus of our Galaxy". Reports on Progress in Physics. 57 (5): 417–479. Bibcode:1994RPPh...57..417G. doi:10.1088/0034-4885/57/5/001. ISSN 0034-4885.

[1] Scientific American – Big Gulp: Flaring Galaxy Marks the Messy Demise of a Star in a Supermassive Black Hole

See also

Timeline of gravitational physics and relativity

Schwarzschild radius

vte

Black holes

Types

Schwarzschild Rotating Charged Virtual Kugelblitz Primordial Planck particle

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

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

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