Black-hole/near-horizon-CFT duality and 4 dimensional classical
... its trace is nonzero. However, In the horizon limit the energy momentum tensor becomes holomorphic equaling the Hawking flux of the four and three dimensions black holes. This encoding of both entropy and temperature provides a uniformity in the calculation of black hole thermodynamics and statistic ...
... its trace is nonzero. However, In the horizon limit the energy momentum tensor becomes holomorphic equaling the Hawking flux of the four and three dimensions black holes. This encoding of both entropy and temperature provides a uniformity in the calculation of black hole thermodynamics and statistic ...
UNCHARGED PARTICLE TUNNELING FROM NON
... of quantum gravity or string/ M-theory , it is argued that the information could come out if the outgoing radiation were not exactly thermal but had subtle corrections[2]. There is some degree of mystery remains in the mechanism of blackhole radiation. In the original derivation of blackhole evapora ...
... of quantum gravity or string/ M-theory , it is argued that the information could come out if the outgoing radiation were not exactly thermal but had subtle corrections[2]. There is some degree of mystery remains in the mechanism of blackhole radiation. In the original derivation of blackhole evapora ...
Nuclear Synthesis
... • Clearly “normal” matter can’t escape surface but why light?? • Classical (Newton) gravity has force = Gm1m2/r2. As mass(photon) = 0, and photon=light, then gravity should not effect • But Einstein (in General Relativity) showed that light can be bent by large gravitational fields • photons tra ...
... • Clearly “normal” matter can’t escape surface but why light?? • Classical (Newton) gravity has force = Gm1m2/r2. As mass(photon) = 0, and photon=light, then gravity should not effect • But Einstein (in General Relativity) showed that light can be bent by large gravitational fields • photons tra ...
Bright Quasar 3C 273 Encyclopedia of Astronomy & Astrophysics eaa.iop.org Thierry J-L Courvoisier
... they outshine the galaxy that hosts them, although they are barely as large as our solar system (which is extremely small compared with the galaxy). They emit electromagnetic radiation that covers all the bands accessible to astronomical observations on the Earth and in orbit, from radio waves to ga ...
... they outshine the galaxy that hosts them, although they are barely as large as our solar system (which is extremely small compared with the galaxy). They emit electromagnetic radiation that covers all the bands accessible to astronomical observations on the Earth and in orbit, from radio waves to ga ...
Spectroscopy – Lecture 1
... level u and lower level l, separated by energy hn. The probability that an atom will emit its quantum energy in a time dt, solid angle dw is Aul. Aul is the Einstein probability coefficient for spontaneous emission. ...
... level u and lower level l, separated by energy hn. The probability that an atom will emit its quantum energy in a time dt, solid angle dw is Aul. Aul is the Einstein probability coefficient for spontaneous emission. ...
solar.gmu.edu
... 1. Why are quasars unusual? How did astronomers discover that they are extraordinarily distant and luminous? 2. What evidence showed a link between quasars and galaxies? 3. How are Seyfert galaxies and radio galaxies related to quasars? 4. How can material ejected from quasars appear to travel faste ...
... 1. Why are quasars unusual? How did astronomers discover that they are extraordinarily distant and luminous? 2. What evidence showed a link between quasars and galaxies? 3. How are Seyfert galaxies and radio galaxies related to quasars? 4. How can material ejected from quasars appear to travel faste ...
Lecture 12
... Their masses have been measured in X-ray emitting binary systems NS masses are clustered around 1.4 M The maximum limit for a stable neutron star is 3-5M Hard lower limits for masses of compact objects have been determined which have values much greater than this limit These are the best stellar ...
... Their masses have been measured in X-ray emitting binary systems NS masses are clustered around 1.4 M The maximum limit for a stable neutron star is 3-5M Hard lower limits for masses of compact objects have been determined which have values much greater than this limit These are the best stellar ...
LAWS, RULES, PRINCIPLES, EFFECTS, PARADOXES, LIMITS,
... The EPR effect demonstrates that if one of the particles isdetected, and its spin is then measured, then the other particle-- no matter where it is in the Universe -- instantaneously isforced to choose as well and take on the role of the otherparticle. This illustrates that certain kinds of quantumi ...
... The EPR effect demonstrates that if one of the particles isdetected, and its spin is then measured, then the other particle-- no matter where it is in the Universe -- instantaneously isforced to choose as well and take on the role of the otherparticle. This illustrates that certain kinds of quantumi ...
SPACETIME SINGULARITIES: The STORY of BLACK HOLES
... place (in fact, since black holes are objects in spacetime, we can’t actually separate their behaviour in time from their behaviour in space). Let’s start with why black holes can form. As we have already seen, General Relativity is what mathematicians call a non-linear theory. If we increase the sp ...
... place (in fact, since black holes are objects in spacetime, we can’t actually separate their behaviour in time from their behaviour in space). Let’s start with why black holes can form. As we have already seen, General Relativity is what mathematicians call a non-linear theory. If we increase the sp ...
Lecture 18 Gamma-Ray Bursts
... pulsar of < 5 ms period if rotation and B-fields are to matter to the explosion. Need a period of ~ 1 ms to make GRBs. This is much faster than observed in common pulsars. Total rotational kinetic energy for a neutron star E rot ~ 2 " 1052 (1 ms/P) 2 (R/10 km) 2 erg ...
... pulsar of < 5 ms period if rotation and B-fields are to matter to the explosion. Need a period of ~ 1 ms to make GRBs. This is much faster than observed in common pulsars. Total rotational kinetic energy for a neutron star E rot ~ 2 " 1052 (1 ms/P) 2 (R/10 km) 2 erg ...
14.5 Galactic Spiral Arms
... 14.6 The Mass of the Milky Way Galaxy Once all the galaxy is within an orbit, the velocity should diminish with distance, as the dashed curve shows. It doesn’t; more than twice the mass of the galaxy would have to be outside the visible part to reproduce the observed curve. ...
... 14.6 The Mass of the Milky Way Galaxy Once all the galaxy is within an orbit, the velocity should diminish with distance, as the dashed curve shows. It doesn’t; more than twice the mass of the galaxy would have to be outside the visible part to reproduce the observed curve. ...
Thermodynamics of black holes
... 1 .l. Black holes T h e key to understanding black holes, and especially their connection with thermodynamics, is to appreciate the meaning of the so-called event horizon. Consider a very compact and massive star. T h e strength of gravity at its surface can be increased either if the star shrinks, ...
... 1 .l. Black holes T h e key to understanding black holes, and especially their connection with thermodynamics, is to appreciate the meaning of the so-called event horizon. Consider a very compact and massive star. T h e strength of gravity at its surface can be increased either if the star shrinks, ...
universe - Global Change
... The visible universe contains at least 100 billion galaxies - these are incredible numbers. This image is of very young galaxies observed by the Hubble Space Telescope at the very limit of its range. The sky is full of such strange looking galaxies in all directions (except where masked by interveni ...
... The visible universe contains at least 100 billion galaxies - these are incredible numbers. This image is of very young galaxies observed by the Hubble Space Telescope at the very limit of its range. The sky is full of such strange looking galaxies in all directions (except where masked by interveni ...
feynman
... rate of clicks holding the electron emission at the electron gun constant what happens if we do experiments in one hole open only, then the other hole open only, then both holes open simultaneously? again we have P1 and P2 but P12 is not P1 + P2 as it was for bullets we can replace the electrons wit ...
... rate of clicks holding the electron emission at the electron gun constant what happens if we do experiments in one hole open only, then the other hole open only, then both holes open simultaneously? again we have P1 and P2 but P12 is not P1 + P2 as it was for bullets we can replace the electrons wit ...
AdSCFTPrimer - Nevis Laboratories
... low viscosity. Even though Son and his co-workers studied a simplified version of chromodynamics, they seem to have come up with a property that is shared by the real world. Does this mean that ...
... low viscosity. Even though Son and his co-workers studied a simplified version of chromodynamics, they seem to have come up with a property that is shared by the real world. Does this mean that ...
Scientific Content
... Superstring theory is one of the most promising candidates for the ultimate theory of the quantum gravitational field, incorporating the hope that quantum gravity is unified with the other fundamental interactions [1,2]. The essence of string theories is based on the hypothesis that fundamental obje ...
... Superstring theory is one of the most promising candidates for the ultimate theory of the quantum gravitational field, incorporating the hope that quantum gravity is unified with the other fundamental interactions [1,2]. The essence of string theories is based on the hypothesis that fundamental obje ...
Ay 122 - Fall 2004 Electromagnetic Radiation And Its Interactions With Matter
... • A blackbody is a hypothetical object that is a perfect absorber of electromagnetic radiation at all wavelengths • Stars closely approximate the behavior of blackbodies, as do some other hot, dense objects ...
... • A blackbody is a hypothetical object that is a perfect absorber of electromagnetic radiation at all wavelengths • Stars closely approximate the behavior of blackbodies, as do some other hot, dense objects ...
A Review of Macroscopic Motion in Thermodynamic Equilibrium
... exceed the air drag at altitudes above 1200 km for satellite sizes over 50 m; they concluded that magnetic drag effects could be ignored. A new analysis of the problem of a conductor moving across a magnetic field was carried out by Drell et al in 1965 [7]. They straightforwardly considered current ...
... exceed the air drag at altitudes above 1200 km for satellite sizes over 50 m; they concluded that magnetic drag effects could be ignored. A new analysis of the problem of a conductor moving across a magnetic field was carried out by Drell et al in 1965 [7]. They straightforwardly considered current ...
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.