Today in Astronomy 102: black hole observations, v.4
... Matter falling into AGN black holes: large accretion disks The disk-shaped collection of matter surrounding the black hole in an AGN arises rather naturally from the influence of the black hole on stars and other material in the galactic center. Stars in a galaxy perpetually interact with each ot ...
... Matter falling into AGN black holes: large accretion disks The disk-shaped collection of matter surrounding the black hole in an AGN arises rather naturally from the influence of the black hole on stars and other material in the galactic center. Stars in a galaxy perpetually interact with each ot ...
Gauss-Bonnet black holes at the LHC: beyond the
... Another important way for realizing TeV scale gravity arises from properties of warped extra-dimensional geometries used in Randall-Sundrum scenarios [7]. If the warp factor is small in the vicinity of the standard model brane, particle masses can take TeV values, thereby giving rise to a large hier ...
... Another important way for realizing TeV scale gravity arises from properties of warped extra-dimensional geometries used in Randall-Sundrum scenarios [7]. If the warp factor is small in the vicinity of the standard model brane, particle masses can take TeV values, thereby giving rise to a large hier ...
Cosmological models, nonideal fluids and viscous forces in general relativity
... The modern theory of gravitation formulated as General Relativity is a backbone of the current approach to theoretical physics. In fact it exhibits many physical applications for example related to astrophysical phenomena like the study of black holes, of massive stars, cosmology, cosmogony, gravita ...
... The modern theory of gravitation formulated as General Relativity is a backbone of the current approach to theoretical physics. In fact it exhibits many physical applications for example related to astrophysical phenomena like the study of black holes, of massive stars, cosmology, cosmogony, gravita ...
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- ...
Lesson 3-1 Powerpoint - peacock
... Step 1 Write an equation for the cost of renting clubs and a cart at each golf course. Let x represent the number of hours and y represent the total cost in dollars. City Park Golf Course: y = 55x + 20 Sea Vista Golf Course: y = 45x + 35 Because the slopes are different, the system is independent an ...
... Step 1 Write an equation for the cost of renting clubs and a cart at each golf course. Let x represent the number of hours and y represent the total cost in dollars. City Park Golf Course: y = 55x + 20 Sea Vista Golf Course: y = 45x + 35 Because the slopes are different, the system is independent an ...
critical angular momentum distributions in collapsars: quiescent
... (1973), namely, ηv = αρcs H , where cs is the local sound speed, H = cs Ω is the pressure scale height, and Ω is the local Keplerian orbital frequency. We have used α = 0.1 throughout for the simulations described in this paper. Given that this form is only applicable if there is a rotating accretio ...
... (1973), namely, ηv = αρcs H , where cs is the local sound speed, H = cs Ω is the pressure scale height, and Ω is the local Keplerian orbital frequency. We have used α = 0.1 throughout for the simulations described in this paper. Given that this form is only applicable if there is a rotating accretio ...
Cosmic Microwave Background Anisotropies:
... energy contribution in the Hubble parameter d H (t0 ) 180( M h 2 ) 1/ 2 (1100)1/ 2 Mpc ...
... energy contribution in the Hubble parameter d H (t0 ) 180( M h 2 ) 1/ 2 (1100)1/ 2 Mpc ...
neutron star - Chabot College
... • Synchotron emission --- non-thermal process where light is emitted by charged particles moving close to the speed of light around magnetic fields. • Emission (mostly radio) is concentrated at the magnetic poles and focused into a beam. • Whether we see a pulsar depends on the geometry. – if the po ...
... • Synchotron emission --- non-thermal process where light is emitted by charged particles moving close to the speed of light around magnetic fields. • Emission (mostly radio) is concentrated at the magnetic poles and focused into a beam. • Whether we see a pulsar depends on the geometry. – if the po ...
Black hole tidal problem in the Fermi normal coordinates
... M R where r denotes the orbital separation and µcrit is a constant ≈ 10–20 which depends on r/M , R/M , spin of the black hole, and equations of state (see Sec. V). If the condition (1) is satisfied outside a minimum orbital radius (e.g., r = 6GM/c2 for a star in a circular orbit around a Schwarzsch ...
... M R where r denotes the orbital separation and µcrit is a constant ≈ 10–20 which depends on r/M , R/M , spin of the black hole, and equations of state (see Sec. V). If the condition (1) is satisfied outside a minimum orbital radius (e.g., r = 6GM/c2 for a star in a circular orbit around a Schwarzsch ...
PART TWO: No Singularity inside Black Holes (BH)
... or Big Bang of Singularity. 2. No Singularity existed in star-formed Schwarzchild’s black holes, a steady mini black hole (its mass 1015 g) of long lifetime would certainly exist inside as a core to obstruct the collapse of energymatters to become Singularity. The steady mini black hole (mom ≈ 101 ...
... or Big Bang of Singularity. 2. No Singularity existed in star-formed Schwarzchild’s black holes, a steady mini black hole (its mass 1015 g) of long lifetime would certainly exist inside as a core to obstruct the collapse of energymatters to become Singularity. The steady mini black hole (mom ≈ 101 ...
Laser Interferometer Space Antenna “Listening to the Universe with
... than the precision of human hair! LISA’s acceleration precision: 3 x 10-15 m/s2 ...
... than the precision of human hair! LISA’s acceleration precision: 3 x 10-15 m/s2 ...
general relativity and gravitational waves
... When we draw spherical coordinates on a sphere, and follow two lines, that are perpendicular to the equation, in the direction of the North pole, we observe that two initial parallel lines meet at a point on the curved surface. The fifth postulate of Euclid does not hold for a curved space: parallel ...
... When we draw spherical coordinates on a sphere, and follow two lines, that are perpendicular to the equation, in the direction of the North pole, we observe that two initial parallel lines meet at a point on the curved surface. The fifth postulate of Euclid does not hold for a curved space: parallel ...
8.2 Solving Systems of Linear Equations by Substitution
... Since the statement is true every solution of one equations is also a solution to the other, so the system has an infinite number of solutions and the solution set is {(x,y)|x + 3y = −7}. It is a common error to give “true” as the solution of a system of dependent equations. Remember to give the sol ...
... Since the statement is true every solution of one equations is also a solution to the other, so the system has an infinite number of solutions and the solution set is {(x,y)|x + 3y = −7}. It is a common error to give “true” as the solution of a system of dependent equations. Remember to give the sol ...
Creation of wormholes by quantum tunnelling in modified gravity
... instanton shapes in de Sitter to de Sitter transitions, depending on whether the false and true vacuum regions are smaller or larger than half of Euclidean de Sitter space, see e.g. the discussion in [15, 16]. A neck is only present in the case where both “halves” of the instanton are larger than ha ...
... instanton shapes in de Sitter to de Sitter transitions, depending on whether the false and true vacuum regions are smaller or larger than half of Euclidean de Sitter space, see e.g. the discussion in [15, 16]. A neck is only present in the case where both “halves” of the instanton are larger than ha ...
PDF - at www.arxiv.org.
... mechanism. For a spherically symmetric system in GR, the solution is uniquely determined by the Schwarzschild metric. However, there is no Birkhoff’s theorem in our system thus we cannot exclude a possibility to have solutions different from Schwarzschild. Here we are interested in a solution which ...
... mechanism. For a spherically symmetric system in GR, the solution is uniquely determined by the Schwarzschild metric. However, there is no Birkhoff’s theorem in our system thus we cannot exclude a possibility to have solutions different from Schwarzschild. Here we are interested in a solution which ...
Black holes - Institute of Physics
... a spherical solution of Einstein’s complicated equations. It showed that a spherical mass like a star, when compressed beyond a certain critical radius, must collapse to an infinitely dense point called a singularity. Spacetime within the boundary of this radius, known as the event horizon, would be ...
... a spherical solution of Einstein’s complicated equations. It showed that a spherical mass like a star, when compressed beyond a certain critical radius, must collapse to an infinitely dense point called a singularity. Spacetime within the boundary of this radius, known as the event horizon, would be ...