A radio pulsing white dwarf binary star
... White dwarfs are compact stars, similar in size to Earth but ∼ 200,000 times more massive1 . Isolated white dwarfs emit most of their power from ultraviolet to near-infrared wavelengths, but when in close orbits with less dense stars, white dwarfs can strip material from their companions, and the re ...
... White dwarfs are compact stars, similar in size to Earth but ∼ 200,000 times more massive1 . Isolated white dwarfs emit most of their power from ultraviolet to near-infrared wavelengths, but when in close orbits with less dense stars, white dwarfs can strip material from their companions, and the re ...
A radio-pulsing white dwarf binary star
... class of stars known as intermediate polars (IPs), which feature spinning magnetic white dwarfs accreting from low-mass stars in close binaries14 . Only one IP, AE Aquarii (AE Aqr), has a broadband SED similar to AR Sco15 and comparably strong radio emission16 , although it shows no radio pulsations ...
... class of stars known as intermediate polars (IPs), which feature spinning magnetic white dwarfs accreting from low-mass stars in close binaries14 . Only one IP, AE Aquarii (AE Aqr), has a broadband SED similar to AR Sco15 and comparably strong radio emission16 , although it shows no radio pulsations ...
Development of a Capacitive Probe to Investigate Surface Charge
... of bright or dark bands that pass the photodetector. That number is equivalent to a change in distance of n wavelengths in one of the arms of the interferometer. LIGO is a Michelson interferometer with an effective arm length on the order of 102 km.1-2 The arm length of an interferometer is the dist ...
... of bright or dark bands that pass the photodetector. That number is equivalent to a change in distance of n wavelengths in one of the arms of the interferometer. LIGO is a Michelson interferometer with an effective arm length on the order of 102 km.1-2 The arm length of an interferometer is the dist ...
URL - StealthSkater
... provides the normal force opposing the gravitational acceleration field of the Earth, thus providing “a measured 1 g force” applied to the body. Assuming the spacecraft power system provides a normal 1 g gravity field within the spacecraft to give the astronauts the same sensation as standing on Ear ...
... provides the normal force opposing the gravitational acceleration field of the Earth, thus providing “a measured 1 g force” applied to the body. Assuming the spacecraft power system provides a normal 1 g gravity field within the spacecraft to give the astronauts the same sensation as standing on Ear ...
3.1 Radio Astronomy Research Results For much of PY 2010, radio
... most likely a pulsar wind nebula. Timing of the young relativistic binary J1906+0746 will continue because the secular changes in its pulse shape from geodetic precession allow the pulsar’s beam shape to be sampled. Timing will also allow PALFA to determine the masses and to test the orbital period ...
... most likely a pulsar wind nebula. Timing of the young relativistic binary J1906+0746 will continue because the secular changes in its pulse shape from geodetic precession allow the pulsar’s beam shape to be sampled. Timing will also allow PALFA to determine the masses and to test the orbital period ...
FUTURE INSTRUMENTAL CAPABILITIES IN THE ENERGY RANGE
... Our present understanding of the low energy (<1 MeV) gamma-ray sky has been acquired mainly by coded aperture systems. Operational satellite instruments of this type include SIGMA, OSSE and BATSE (Paul et al. 1991, Johnson et al. 1993, and Fishman et al. 1989). While the detection plane of all three ...
... Our present understanding of the low energy (<1 MeV) gamma-ray sky has been acquired mainly by coded aperture systems. Operational satellite instruments of this type include SIGMA, OSSE and BATSE (Paul et al. 1991, Johnson et al. 1993, and Fishman et al. 1989). While the detection plane of all three ...
The Formation and Evolution of Massive Black Holes - Ira-Inaf
... not the case when the content of heavy elements increases. In today’s universe, a very massive star would lose most of its mass in powerful winds before collapsing into a stellar mass black hole. This channel of MBH formation naturally predicts that MBHs formed only in the early universe. These alte ...
... not the case when the content of heavy elements increases. In today’s universe, a very massive star would lose most of its mass in powerful winds before collapsing into a stellar mass black hole. This channel of MBH formation naturally predicts that MBHs formed only in the early universe. These alte ...
General relativity in a (2+1)-dimensional space
... This becomes especially important in the absence of mass, where Tmn = O. From Einstein's equation Rmn = 0 also, and therefore R~bcd= 0 as well. This precludes any curvature at all in the vacuum, whether in the form of gravitational waves or attraction at a distance. (This is obviously different from ...
... This becomes especially important in the absence of mass, where Tmn = O. From Einstein's equation Rmn = 0 also, and therefore R~bcd= 0 as well. This precludes any curvature at all in the vacuum, whether in the form of gravitational waves or attraction at a distance. (This is obviously different from ...
7 The Schwarzschild Solution and Black Holes
... speaking, if gIJ or f depended on the ui then the metric would change as we moved in a single submanifold, which violates the assumption of symmetry. The unwanted cross terms, meanwhile, can be eliminated by making sure that the tangent vectors ∂/∂v I are orthogonal to the submanifolds — in other wo ...
... speaking, if gIJ or f depended on the ui then the metric would change as we moved in a single submanifold, which violates the assumption of symmetry. The unwanted cross terms, meanwhile, can be eliminated by making sure that the tangent vectors ∂/∂v I are orthogonal to the submanifolds — in other wo ...
Models of rapidly rotating neutron stars: remnants of accretion
... using realistic EOS for both the pre-collapse white dwarfs and the collapsed stars. For the pre-collapse white dwarfs, we use the EOS of a zero-temperature degenerate electron gas with electrostatic corrections. A hot, lepton-rich proto-neutron star is formed as a result of the collapse. This proto- ...
... using realistic EOS for both the pre-collapse white dwarfs and the collapsed stars. For the pre-collapse white dwarfs, we use the EOS of a zero-temperature degenerate electron gas with electrostatic corrections. A hot, lepton-rich proto-neutron star is formed as a result of the collapse. This proto- ...
Diffraction and Interference of EM waves
... Brief history of holography • Invented in 1948 by Dennis Gabor – to improve the resolution in electron microscopy, before the invention of the laser (this time light sources were not coherent) • Leith and Upatnieks (1962) applied laser light to ...
... Brief history of holography • Invented in 1948 by Dennis Gabor – to improve the resolution in electron microscopy, before the invention of the laser (this time light sources were not coherent) • Leith and Upatnieks (1962) applied laser light to ...
The Origins of Dark Matter, Dark Energy, and their
... In the earth to sun’s case, the time it takes for light to reach the earth is a little over eight minutes. This means that the sun you see is not in the same location as where it reall ...
... In the earth to sun’s case, the time it takes for light to reach the earth is a little over eight minutes. This means that the sun you see is not in the same location as where it reall ...
Quantum Enhanced Gravitational Wave Detector
... Quantum Enhanced Gravitational Wave Detector Squeezed state injection into a LIGO interferometer ...
... Quantum Enhanced Gravitational Wave Detector Squeezed state injection into a LIGO interferometer ...
PDF - at www.arxiv.org.
... Fourteen years after Supplee’s publication, Matsas had analyzed the problem again, but this time using the full machinery of general relativity [2]. Considering a background spacetime with a Rindler chart and assuming reasonable conditions about the submarine rigidness, Matsas analyzed the motion of ...
... Fourteen years after Supplee’s publication, Matsas had analyzed the problem again, but this time using the full machinery of general relativity [2]. Considering a background spacetime with a Rindler chart and assuming reasonable conditions about the submarine rigidness, Matsas analyzed the motion of ...
X-ray binaries
... companion star or the interstellar medium, its magnetic field becomes dynamically important close to the stellar surface and determines the properties of the accretion flow. The radius at which the effects of the magnetic field dominate all others is called the Alfven radius. • For thin-disk accretion o ...
... companion star or the interstellar medium, its magnetic field becomes dynamically important close to the stellar surface and determines the properties of the accretion flow. The radius at which the effects of the magnetic field dominate all others is called the Alfven radius. • For thin-disk accretion o ...
Angular momentum and the formation of stars and
... spin angular momentum of this matter must still be removed or redistributed during the star formation process. The excess spin angular momentum of the matter from which each star forms could in principle be transferred to outlying gas or to the orbital motions of other stars, and both magnetic and g ...
... spin angular momentum of this matter must still be removed or redistributed during the star formation process. The excess spin angular momentum of the matter from which each star forms could in principle be transferred to outlying gas or to the orbital motions of other stars, and both magnetic and g ...