Chapter 22 PowerPoint
... Summary of Chapter 22 (cont.) • A distant observer would see an object entering black hole subject to extreme gravitational redshift and time dilation. • Material approaching a black hole will emit strong Xrays. • A few such X-ray sources have been found and are black-hole candidates. ...
... Summary of Chapter 22 (cont.) • A distant observer would see an object entering black hole subject to extreme gravitational redshift and time dilation. • Material approaching a black hole will emit strong Xrays. • A few such X-ray sources have been found and are black-hole candidates. ...
The Future of Computer Science
... reflects fundamental principles of physics—Special Relativity and the Second Law respectively So what about the third one? What are the ultimate physical limits on what can be feasibly computed? And do those limits have any implications for physics? ...
... reflects fundamental principles of physics—Special Relativity and the Second Law respectively So what about the third one? What are the ultimate physical limits on what can be feasibly computed? And do those limits have any implications for physics? ...
this PDF file - e
... In this review article, we have described the idea of Kerr/CFT correspondence, both for the extremal and non extremal cases. Some basic materials on Kerr black holes in general relativity, as well as the corresponding thermodynamical aspects, and also some concepts in conformal field theory are prov ...
... In this review article, we have described the idea of Kerr/CFT correspondence, both for the extremal and non extremal cases. Some basic materials on Kerr black holes in general relativity, as well as the corresponding thermodynamical aspects, and also some concepts in conformal field theory are prov ...
AMUSE-Virgo on the survival of super
... - 57 new targets with Spitzer MIPS (9.5 hr) + 43 archival - HST ACS archival data (100 orbits) - VLA, in progress (with D. Axon) ...
... - 57 new targets with Spitzer MIPS (9.5 hr) + 43 archival - HST ACS archival data (100 orbits) - VLA, in progress (with D. Axon) ...
Gravity from Quantum Information
... The Einstein equation express a relation between matter and the spacetime geometry that the matter disturbs. Despite of the clear geometric meaning of the Einstein tensor, the origin of this relation still remains a mystery. In 1995, Jacobson suggested an interesting idea that the Einstein equation ...
... The Einstein equation express a relation between matter and the spacetime geometry that the matter disturbs. Despite of the clear geometric meaning of the Einstein tensor, the origin of this relation still remains a mystery. In 1995, Jacobson suggested an interesting idea that the Einstein equation ...
MATTERS OF GRAVITY *******Anniversary Edition******* Contents
... electronic device that wouldn’t work without taking GR’s corrections into account. Particle physicists, that not long ago kind of looked down at GR, nowadays use Einstein’s spacetimes in every other paper. Observational cosmology has exploded, relativistic astrophysics is solidly established; the pr ...
... electronic device that wouldn’t work without taking GR’s corrections into account. Particle physicists, that not long ago kind of looked down at GR, nowadays use Einstein’s spacetimes in every other paper. Observational cosmology has exploded, relativistic astrophysics is solidly established; the pr ...
Black hole energy release to the Gaseous Universe
... BH formation to clusters of galaxies was taken by Enßlin et al. (1997) by an estimate of the jet-power of radio galaxies, integrated over cosmological epochs. A comparison with the typical thermal energy content of cluster showed, that both numbers could be comparable on cluster scale, if a consider ...
... BH formation to clusters of galaxies was taken by Enßlin et al. (1997) by an estimate of the jet-power of radio galaxies, integrated over cosmological epochs. A comparison with the typical thermal energy content of cluster showed, that both numbers could be comparable on cluster scale, if a consider ...
On quantization of gravitational waves
... gravity is quantized the gravitational wave has to be distinguishable from quantum noise due to the detector’s position and the equivalence principle. This implies a detector size ∼ (Gk)−1 . Putting everything together we get L ∼ G−1 k −3 estimate for the detector size, of course amply obeyed in [6] ...
... gravity is quantized the gravitational wave has to be distinguishable from quantum noise due to the detector’s position and the equivalence principle. This implies a detector size ∼ (Gk)−1 . Putting everything together we get L ∼ G−1 k −3 estimate for the detector size, of course amply obeyed in [6] ...
SUMMARY White dwarfs, neutron stars, and black holes are the
... neutrons with a radius of a mere 10 kilometers that may contain up to about 2 to 3 solar masses. Conservation of angular momentum during its collapse accelerates its rotation rate to about 1000 times per second. This spin and the star's magnetic field generate beams of radiation that sweep across sp ...
... neutrons with a radius of a mere 10 kilometers that may contain up to about 2 to 3 solar masses. Conservation of angular momentum during its collapse accelerates its rotation rate to about 1000 times per second. This spin and the star's magnetic field generate beams of radiation that sweep across sp ...
The Concept of Probability in Quantum Mechanics
... that the electron passes through hole 1 or hole 2. But it is easy to design an experiment to test our conclusion directly. One has merely to have a source of light behind the holes and watch to see through which hole the electron passes. For electrons scatter light, so that if light is scattered be ...
... that the electron passes through hole 1 or hole 2. But it is easy to design an experiment to test our conclusion directly. One has merely to have a source of light behind the holes and watch to see through which hole the electron passes. For electrons scatter light, so that if light is scattered be ...
Chapter 13
... will be seen by observers as experiencing a dramatic redshift as it gets closer, so that time appears to be going more and more slowly as it approaches the event horizon. This is called a gravitational redshift – it is not due to motion, but to the large gravitational fields present. The probe itsel ...
... will be seen by observers as experiencing a dramatic redshift as it gets closer, so that time appears to be going more and more slowly as it approaches the event horizon. This is called a gravitational redshift – it is not due to motion, but to the large gravitational fields present. The probe itsel ...
Black Hole Entropy: From Shannon to Bekenstein
... from [2]: “At the outset it should be clear that the black hole entropy we are speaking of is not the thermal entropy inside the black hole.” We have shown that it can be directly obtained from the Shannon formula of information entropy. Furthermore Bekenstein also emphasizes that a quantum analysis ...
... from [2]: “At the outset it should be clear that the black hole entropy we are speaking of is not the thermal entropy inside the black hole.” We have shown that it can be directly obtained from the Shannon formula of information entropy. Furthermore Bekenstein also emphasizes that a quantum analysis ...
Read the article
... graphic software have been used to extract deeper information from the digital data. The radio source SgrA* lies encoiled inside the Northern arm of this micro-spiral. ...
... graphic software have been used to extract deeper information from the digital data. The radio source SgrA* lies encoiled inside the Northern arm of this micro-spiral. ...
Active Galactic Nuclei: are they important?
... SDSS we have found one with strong LILs and weak HIL., and no NLR. ...
... SDSS we have found one with strong LILs and weak HIL., and no NLR. ...
on the mass of the black hole in gs
... of this system, the data were fitted to a model consisting of a Roche lobe filling secondary (Avni 1978). A simple blackbody approximation was assumed, with limb-darkening coefficients taken from Al-Naimiy (1978) and a gravitational darkening coefficient of 0.08 (Lucy 1967), appropriate for an early ...
... of this system, the data were fitted to a model consisting of a Roche lobe filling secondary (Avni 1978). A simple blackbody approximation was assumed, with limb-darkening coefficients taken from Al-Naimiy (1978) and a gravitational darkening coefficient of 0.08 (Lucy 1967), appropriate for an early ...
The Kerr-Metric: describing Rotating Black Holes
... the theory of cosmology as they are perhaps ‘seeds’ of galaxy formation. However, how they are formed is unclear, as well is the answer to the question whether they are properly described by the Kerr-metric. Supermassive black holes may have been created in the very early universe and tell us things ...
... the theory of cosmology as they are perhaps ‘seeds’ of galaxy formation. However, how they are formed is unclear, as well is the answer to the question whether they are properly described by the Kerr-metric. Supermassive black holes may have been created in the very early universe and tell us things ...
The Unruh effect revisited
... Hawking effect deals with quantum fields in strong gravitational fields. Unruh asked a related, simpler question: since according to the equivalence principle, gravitation and acceleration are two sides of the same coin, he wondered: “How does a vacuum field look to an accelerated (rather than inert ...
... Hawking effect deals with quantum fields in strong gravitational fields. Unruh asked a related, simpler question: since according to the equivalence principle, gravitation and acceleration are two sides of the same coin, he wondered: “How does a vacuum field look to an accelerated (rather than inert ...
Abstract Model and parameters Mesoscopic system Macroscopic
... be tuned from a delocalized (liquid-like) to a localized (crystal-like) state, while the electrons remain delocalized (me is fixed). As was recently demonstrated [1] in bulk systems holes undergo a crystallization transition if the mass ratio exceeds a critical value of Mcr ≈ 83. Here we extend this ...
... be tuned from a delocalized (liquid-like) to a localized (crystal-like) state, while the electrons remain delocalized (me is fixed). As was recently demonstrated [1] in bulk systems holes undergo a crystallization transition if the mass ratio exceeds a critical value of Mcr ≈ 83. Here we extend this ...
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.