Black Holes - WordPress.com
... explains laws of gravitation and its effect on space-time, including light, this helped form a plausible reason for light to be non-existent in this dense object in space — the gravity would be so immense that the light would warp and no longer be in the visible spectrum. One German scientist — Karl ...
... explains laws of gravitation and its effect on space-time, including light, this helped form a plausible reason for light to be non-existent in this dense object in space — the gravity would be so immense that the light would warp and no longer be in the visible spectrum. One German scientist — Karl ...
Neutron Stars and Black Holes
... explosion of a star more massive than 8 solar masses. Recall that a Type II supernova is the explosion of a single, massive star. Type Ib and Ic supernovae are also explosions of single, massive stars, but stars which have lost their outer envelopes of hydrogen or hydrogen and helium. A pulsar does ...
... explosion of a star more massive than 8 solar masses. Recall that a Type II supernova is the explosion of a single, massive star. Type Ib and Ic supernovae are also explosions of single, massive stars, but stars which have lost their outer envelopes of hydrogen or hydrogen and helium. A pulsar does ...
Neutron stars and black holes
... explosion of a star more massive than 8 solar masses. Recall that a Type II supernova is the explosion of a single, massive star. Type Ib and Ic supernovae are also explosions of single, massive stars, but stars which have lost their outer envelopes of hydrogen or hydrogen and helium. A pulsar does ...
... explosion of a star more massive than 8 solar masses. Recall that a Type II supernova is the explosion of a single, massive star. Type Ib and Ic supernovae are also explosions of single, massive stars, but stars which have lost their outer envelopes of hydrogen or hydrogen and helium. A pulsar does ...
Things that Go Bump in the Night – Lecture Notes
... There are other examples – antibiotic resistant bacteria - that are not necessarily evolutionary but can be explained in other terms. Separate the physical data from the speculations Mass - how much matter you have…how much stuff. Weight is the effects of gravity on mass…actually three factors ...
... There are other examples – antibiotic resistant bacteria - that are not necessarily evolutionary but can be explained in other terms. Separate the physical data from the speculations Mass - how much matter you have…how much stuff. Weight is the effects of gravity on mass…actually three factors ...
lecture21
... the supernova, neutron star is left ‘naked’. The gravity squeezing the neutron star is immense due to its tiny size and large mass. For neutron stars with mass below about 3 solar masses, the degenerate neutron pressure is enough to withstand gravity and an equilibrium results. What happens if the n ...
... the supernova, neutron star is left ‘naked’. The gravity squeezing the neutron star is immense due to its tiny size and large mass. For neutron stars with mass below about 3 solar masses, the degenerate neutron pressure is enough to withstand gravity and an equilibrium results. What happens if the n ...
Formation and Sustenance of Black Holes
... critical density or mass over volume. This is most readily seen at the death of a star. The nuclear fusion that acts as the fuel source for the star, also keeps it “puffed up.” That is to say that the weight of the star material is balanced with the outward force created by the fusion in the center ...
... critical density or mass over volume. This is most readily seen at the death of a star. The nuclear fusion that acts as the fuel source for the star, also keeps it “puffed up.” That is to say that the weight of the star material is balanced with the outward force created by the fusion in the center ...
Black Holes: Edge of Infinity Jonathan McKinney
... ¾ Total free energy in rapidly spinning BH: 30% of its mass Observed Efficiency of BHs: ¾ Quasars = old active galaxies with active galactic nucleus ¾ Quasars w/ BHs: ~20% efficient Efficiency of Mechanisms to Extract Free Energy (E=mc2): ¾ Antimatter-matter: 100% of mass ¾ Nuclear Fusion: 0.07% ¾ G ...
... ¾ Total free energy in rapidly spinning BH: 30% of its mass Observed Efficiency of BHs: ¾ Quasars = old active galaxies with active galactic nucleus ¾ Quasars w/ BHs: ~20% efficient Efficiency of Mechanisms to Extract Free Energy (E=mc2): ¾ Antimatter-matter: 100% of mass ¾ Nuclear Fusion: 0.07% ¾ G ...
The Astrophysics of Massive Black Hole Mergers
... • Accretion around black hole binaries and black hole coalescence will be accompanied by a variety of ...
... • Accretion around black hole binaries and black hole coalescence will be accompanied by a variety of ...
Support Materials - Discovery Education
... Definition: A galaxy that is a powerful source of radio waves. Context: Mighty jets of energized particles are blasted into space from invisible engines at the hearts of these so-called radio galaxies–further evidence that a black hole is driving the process. gravity Definition: A fundamental physic ...
... Definition: A galaxy that is a powerful source of radio waves. Context: Mighty jets of energized particles are blasted into space from invisible engines at the hearts of these so-called radio galaxies–further evidence that a black hole is driving the process. gravity Definition: A fundamental physic ...
Hierarchical galaxy formation
... Strength of gravity depends on: •Mass of object •Distance from centre of mass If enough mass is concentrated into a small enough volume its gravity will be so strong that even light will not be able to escape. ...
... Strength of gravity depends on: •Mass of object •Distance from centre of mass If enough mass is concentrated into a small enough volume its gravity will be so strong that even light will not be able to escape. ...
Introduction to Black Hole Thermodynamics
... by using Einstein action with a boundary term • conical singularity method dependence of partition function on the deficit angle (related to temperature) • Wald formula BH entropy as Noether charge surface integral of Noether current on horizon associated with general coordinate tr. ...
... by using Einstein action with a boundary term • conical singularity method dependence of partition function on the deficit angle (related to temperature) • Wald formula BH entropy as Noether charge surface integral of Noether current on horizon associated with general coordinate tr. ...
Quiz on Chapter 11
... Which of the following happens near (but outside) a black hole? photons turn redder as they leave the vicinity of the black hole X photons speed up as they fall in towards the black hole time speeds up objects are compressed in all directions ...
... Which of the following happens near (but outside) a black hole? photons turn redder as they leave the vicinity of the black hole X photons speed up as they fall in towards the black hole time speeds up objects are compressed in all directions ...
Black Holes
... Carter, among others, discovered solutions for black holes showing they have mass, angular momentum and electric charge. ...
... Carter, among others, discovered solutions for black holes showing they have mass, angular momentum and electric charge. ...
15compact2s
... If a stellar core has mass greater than the Chandrasehkar limit (1.4 Msun), electron degeneracy pressure cannot support it ...
... If a stellar core has mass greater than the Chandrasehkar limit (1.4 Msun), electron degeneracy pressure cannot support it ...
Life Cycle of a Star
... • All the heavy atoms made from came originally from these giant supernova explosions. ...
... • All the heavy atoms made from came originally from these giant supernova explosions. ...
black_holes
... much smaller than our Sun but of similar mass. A star shines because its center is so hot and dense that hydrogen nuclei fuse together, creating tremendous energy. It lives for millions or billions of years while the inward pull from its own gravity is balanced by the outward pressure from nuclear f ...
... much smaller than our Sun but of similar mass. A star shines because its center is so hot and dense that hydrogen nuclei fuse together, creating tremendous energy. It lives for millions or billions of years while the inward pull from its own gravity is balanced by the outward pressure from nuclear f ...
PPT
... • Two processes take place: star becomes denser, and its angular velocity increases (to conserve the angular momentum). ...
... • Two processes take place: star becomes denser, and its angular velocity increases (to conserve the angular momentum). ...
Black holes and the Structure of Space-Time
... the number of quanta (“atoms”) necessary to describe a black hole should be proportional to the area. All information about the black hole should be stored on its horizon. Usual hologram: a 2d surface encodes all information about a three dimensional object In string theory, which is a theory of qua ...
... the number of quanta (“atoms”) necessary to describe a black hole should be proportional to the area. All information about the black hole should be stored on its horizon. Usual hologram: a 2d surface encodes all information about a three dimensional object In string theory, which is a theory of qua ...
Hawking radiation
Hawking radiation is black body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also after Jacob Bekenstein, who predicted that black holes should have a finite, non-zero temperature and entropy.Hawking's work followed his visit to Moscow in 1973 where the Soviet scientists Yakov Zeldovich and Alexei Starobinsky showed him that, according to the quantum mechanical uncertainty principle, rotating black holes should create and emit particles. Hawking radiation reduces the mass and energy of black holes and is therefore also known as black hole evaporation. Because of this, black holes that lose more mass than they gain through other means are expected to shrink and ultimately vanish. Micro black holes are predicted to be larger net emitters of radiation than larger black holes and should shrink and dissipate faster.In September 2010, a signal that is closely related to black hole Hawking radiation (see analog gravity) was claimed to have been observed in a laboratory experiment involving optical light pulses. However, the results remain unverified and debatable. Other projects have been launched to look for this radiation within the framework of analog gravity. In June 2008, NASA launched the Fermi space telescope, which is searching for the terminal gamma-ray flashes expected from evaporating primordial black holes. In the event that speculative large extra dimension theories are correct, CERN's Large Hadron Collider may be able to create micro black holes and observe their evaporation.