RXTE PCA Contributions to Monitoring Fast Transients
... Perhaps interaction with the pulsar and the magnetosphere are involved. Other instabilities besides the thermal-viscous disk instability may cause the flips between quiescence and steady accretion. Several sources have had variable accretion in the range 10 34-1035 ergs s-1 for years, while others h ...
... Perhaps interaction with the pulsar and the magnetosphere are involved. Other instabilities besides the thermal-viscous disk instability may cause the flips between quiescence and steady accretion. Several sources have had variable accretion in the range 10 34-1035 ergs s-1 for years, while others h ...
Laser Interferometer Space Antenna “Listening to the Universe with
... – Like measuring the distance between ...
... – Like measuring the distance between ...
neutron star - Chabot College
... • Black holes don’t suck in objects at large distances. If our Sun were instantly replaced by a solar-mass black hole, the Earth would not be sucked into the black hole. The planets would continue to orbit normally. © 2005 Pearson Education Inc., publishing as Addison-Wesley ...
... • Black holes don’t suck in objects at large distances. If our Sun were instantly replaced by a solar-mass black hole, the Earth would not be sucked into the black hole. The planets would continue to orbit normally. © 2005 Pearson Education Inc., publishing as Addison-Wesley ...
Walk Softly When Exploring the Dark Side of the Universe Karl Gebhardt
... Advanced Computing Center) and the 5800 (called Lonestar) and 60,000 ...
... Advanced Computing Center) and the 5800 (called Lonestar) and 60,000 ...
The negative equivalent mass of gravitational fields
... negative mass ratio may be about 15 to 20% higher than is shown in the table above. However, it would probably not be anywhere close to an order of magnitude higher under any reasonable model for Jupiter’s density profile. With respect to the Sun, the density profile has a more serious effect. On pa ...
... negative mass ratio may be about 15 to 20% higher than is shown in the table above. However, it would probably not be anywhere close to an order of magnitude higher under any reasonable model for Jupiter’s density profile. With respect to the Sun, the density profile has a more serious effect. On pa ...
Laser Cosmology
... for UHECR accelerator is that it should be linear to avoid any unnecessary radiative energy loss. Two proposed new mechanisms, the Zevatron [16] and the plasma wakefield acceleration [17], belong to this linear acceleration category. The idea behind Zevatron is uni-polar induction acceleration. It w ...
... for UHECR accelerator is that it should be linear to avoid any unnecessary radiative energy loss. Two proposed new mechanisms, the Zevatron [16] and the plasma wakefield acceleration [17], belong to this linear acceleration category. The idea behind Zevatron is uni-polar induction acceleration. It w ...
Dynamical models of the nucleus of M31
... • since H and C are both quadratic in the coordinates and momenta, the only non-trivial parameter is H/C • in microcanonical ensemble the mean energy and angular-momentum deficit in mode k are where s and t are chosen to match the initial conditions H=kh Eki, C=kh Cki • t = inverse temperature = ( ...
... • since H and C are both quadratic in the coordinates and momenta, the only non-trivial parameter is H/C • in microcanonical ensemble the mean energy and angular-momentum deficit in mode k are where s and t are chosen to match the initial conditions H=kh Eki, C=kh Cki • t = inverse temperature = ( ...
Accretion Disks
... • What allows the accreting gas to lose its angular momentum? • Suppose that there is some kind of “viscosity” in the disk – Different annuli of the disk rub against each other and exchange angular momentum – Results in most of the matter moving inwards and eventually accreting – Angular momentum ca ...
... • What allows the accreting gas to lose its angular momentum? • Suppose that there is some kind of “viscosity” in the disk – Different annuli of the disk rub against each other and exchange angular momentum – Results in most of the matter moving inwards and eventually accreting – Angular momentum ca ...
Electron and the Holographic Mass
... threshold of ~ 1MeV, below which it ‘appears’ point-like and structure-less [3]. ...
... threshold of ~ 1MeV, below which it ‘appears’ point-like and structure-less [3]. ...
gravitational wave Universe - UO Physics
... The event was detected on September 14, 2015 at 5:51 a.m. Eastern Daylight Time (09:51 UTC) by the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors in Livingston, Louisiana, and Hanford, Washington. The masses of the black holes were estimated to be about 29 and 36 times the ...
... The event was detected on September 14, 2015 at 5:51 a.m. Eastern Daylight Time (09:51 UTC) by the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors in Livingston, Louisiana, and Hanford, Washington. The masses of the black holes were estimated to be about 29 and 36 times the ...
18_Testbank - Lick Observatory
... C) The more massive the white dwarf, the higher its temperature and hence the greater its degeneracy pressure. At about 1.4 solar masses, the temperature becomes so high that all matter effectively melts, even individual subatomic particles. D) The upper limit to the masses of white dwarfs was deter ...
... C) The more massive the white dwarf, the higher its temperature and hence the greater its degeneracy pressure. At about 1.4 solar masses, the temperature becomes so high that all matter effectively melts, even individual subatomic particles. D) The upper limit to the masses of white dwarfs was deter ...
BHs and effective quantum gravity approaches
... • Formation of small black holes in the collisions of particles would be a signal of ...
... • Formation of small black holes in the collisions of particles would be a signal of ...
Extraordinary Gamma-Ray Burst
... and variability seen, the outward-directed beam from Swift 1644+57 must point virtually straight at Earth. Other astronomical objects have shown somewhat similar bursts of radiation at X-ray, ultraviolet, and optical wavelengths. These have led researchers to believe they too were witnessing the tid ...
... and variability seen, the outward-directed beam from Swift 1644+57 must point virtually straight at Earth. Other astronomical objects have shown somewhat similar bursts of radiation at X-ray, ultraviolet, and optical wavelengths. These have led researchers to believe they too were witnessing the tid ...
PDF format
... a) True, pulsars were the first evidence for the existence of objects more compact than a white dwarf. b) True, neutron stars had been observed before at optical wavelengths but it was only after they were found to pulsate at radio wavelengths that astronomers realized their nature. c) False, the ...
... a) True, pulsars were the first evidence for the existence of objects more compact than a white dwarf. b) True, neutron stars had been observed before at optical wavelengths but it was only after they were found to pulsate at radio wavelengths that astronomers realized their nature. c) False, the ...
PH607lec10
... so far. They seem to have all been formed in a single star formation event a few million years ago. The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They ...
... so far. They seem to have all been formed in a single star formation event a few million years ago. The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They ...
Book of Abstracts
... over extreme distances and energy ranges. Moreover, neutrino propagation and oscillation has been probed by experiments from the MeV to the PeV and from the meter to extra-galactic scales. This puts neutrinos in a prime position to search for unitarity or Lorentz violating effects often predicted in ...
... over extreme distances and energy ranges. Moreover, neutrino propagation and oscillation has been probed by experiments from the MeV to the PeV and from the meter to extra-galactic scales. This puts neutrinos in a prime position to search for unitarity or Lorentz violating effects often predicted in ...
Gravitational Repulsion within a Black-Hole
... equation of a massive body in the presence of a Schwarzschild gravitational field. We treat the mathematical behavior of the wavefunction also around and beyond the horizon (r = 2M). Classically, within the horizon, the time component of the metric becomes spacelike and distance from the origin sing ...
... equation of a massive body in the presence of a Schwarzschild gravitational field. We treat the mathematical behavior of the wavefunction also around and beyond the horizon (r = 2M). Classically, within the horizon, the time component of the metric becomes spacelike and distance from the origin sing ...
Daly2014
... models for 71 FRII RG assuming a constant magnetic field strength. The results indicate a range of about a factor of 5 in spin, with values ranging from about 0.2 to 1 for an assumed field strength of 104 G. The sources have redshifts between zero and two, and the spin exhibits mind positive evoluti ...
... models for 71 FRII RG assuming a constant magnetic field strength. The results indicate a range of about a factor of 5 in spin, with values ranging from about 0.2 to 1 for an assumed field strength of 104 G. The sources have redshifts between zero and two, and the spin exhibits mind positive evoluti ...
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.