MICROQUASARS
... LSI +61 303 is a Be star like PSR B1259-63 & all known Be/X-ray binary are NSs But does not satisfactorily fit the GeV & radio wavelength fluxes in LSI & LS 5039 Definitive proof: Detection of pulsations in LS 5039 & LSI +61 303 ...
... LSI +61 303 is a Be star like PSR B1259-63 & all known Be/X-ray binary are NSs But does not satisfactorily fit the GeV & radio wavelength fluxes in LSI & LS 5039 Definitive proof: Detection of pulsations in LS 5039 & LSI +61 303 ...
The Milky Way - National Tsing Hua University
... • How did scientists predict the existence of black holes? • What is the evidence that black holes really exist? • What happens when matter falls into a neutron star or black hole? ...
... • How did scientists predict the existence of black holes? • What is the evidence that black holes really exist? • What happens when matter falls into a neutron star or black hole? ...
Semi-local Quantum Liquids
... Could the strange metal phase of cuprates and certain critical behavior of heavy fermions be due to an intermediate-energy phase such as SLQL? SLQL offers novel superconducting instabilities, could Superconductivity in cuprates or certain heavy fermion materials be of similar origin? More generally, ...
... Could the strange metal phase of cuprates and certain critical behavior of heavy fermions be due to an intermediate-energy phase such as SLQL? SLQL offers novel superconducting instabilities, could Superconductivity in cuprates or certain heavy fermion materials be of similar origin? More generally, ...
Special Relativity
... Evidence exists indicating that there are massive black holes at the center of most galaxies, including our Milky Way, which has 4.1 million solar masses. Although no matter can escape a black hole they may radiate energy via ``Hawking Radiation”. Insignificant effect for large black holes, but micr ...
... Evidence exists indicating that there are massive black holes at the center of most galaxies, including our Milky Way, which has 4.1 million solar masses. Although no matter can escape a black hole they may radiate energy via ``Hawking Radiation”. Insignificant effect for large black holes, but micr ...
Handy Pinhole Camera (Latin Camera Obscura) - (EU
... the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will have to wait for the next one until 2117) so it is not surprising that the forthcoming eve ...
... the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will have to wait for the next one until 2117) so it is not surprising that the forthcoming eve ...
Grzegorz F - (EU
... the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will have to wait for the next one until 2117) so it is not surprising that the forthcoming eve ...
... the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will have to wait for the next one until 2117) so it is not surprising that the forthcoming eve ...
10 Stellar Evolution - Journigan-wiki
... singularity. The faster the black hole rotates, the larger the inner event horizon becomes, while the outer event horizon remains the same size. They become the same size when the rotational energy equals the mass energy of the black hole. If the rotational energy were to become more than the mass e ...
... singularity. The faster the black hole rotates, the larger the inner event horizon becomes, while the outer event horizon remains the same size. They become the same size when the rotational energy equals the mass energy of the black hole. If the rotational energy were to become more than the mass e ...
Black Hole Accretion
... Gas with angular momentum goes into orbit at a large radius around the BH Slowly spirals in by “viscosity” (magnetic stresses) and falls into the BH at the center Potential energy is converted into orbital kinetic energy and thermal energy: Thermal energy is radiated, partly from the disk and partly ...
... Gas with angular momentum goes into orbit at a large radius around the BH Slowly spirals in by “viscosity” (magnetic stresses) and falls into the BH at the center Potential energy is converted into orbital kinetic energy and thermal energy: Thermal energy is radiated, partly from the disk and partly ...
transparencies - Rencontres de Moriond
... Going beyond boundaries thanks to accurate spatial information • Bring the ultimate evidence that Sgr A* is a black hole: the mass is contained in the Schwarzschild radius. • Understand the nature of flares. • Use the black hole as a tool to study general relativity in the strong field regime ...
... Going beyond boundaries thanks to accurate spatial information • Bring the ultimate evidence that Sgr A* is a black hole: the mass is contained in the Schwarzschild radius. • Understand the nature of flares. • Use the black hole as a tool to study general relativity in the strong field regime ...
CHAPTER 15: General Relativity
... While a star is burning, the heat produced by the thermonuclear reactions pushes out the star’s matter and balances the force of gravity. When the star’s fuel is depleted, no heat is left to counteract the force of gravity, which becomes dominant. The star’s mass collapses into an incredibly dense b ...
... While a star is burning, the heat produced by the thermonuclear reactions pushes out the star’s matter and balances the force of gravity. When the star’s fuel is depleted, no heat is left to counteract the force of gravity, which becomes dominant. The star’s mass collapses into an incredibly dense b ...
Untitled - College of William and Mary
... Anti-de Sitter space with a field theory on the conformal boundary of this space. (This is a conjectured correspondence, strongly motivated by work in string theory, but is not proven [6].) The case of black hole thermodynamics merits some more in depth discussion. Work done by both Hawking and Beke ...
... Anti-de Sitter space with a field theory on the conformal boundary of this space. (This is a conjectured correspondence, strongly motivated by work in string theory, but is not proven [6].) The case of black hole thermodynamics merits some more in depth discussion. Work done by both Hawking and Beke ...
1 Dr. Steve Hawley Volume 35 Number 04 APRIL 2009
... revealed how uncertainty can breed politics in science — but also how scientists deal with an evolving understanding of the universe. Many people involved in the Pluto debate fall roughly into two camps. One side argues that Pluto, which sits far out beyond the eight current planets, belongs with th ...
... revealed how uncertainty can breed politics in science — but also how scientists deal with an evolving understanding of the universe. Many people involved in the Pluto debate fall roughly into two camps. One side argues that Pluto, which sits far out beyond the eight current planets, belongs with th ...
bht4_macgibbon
... dform ~1 / me in CM frame BUT average angle between final on-shell electron and photon is φav~ me / 2E so dform ~E / me2 in CM frame Electron must travel dform ~E / me2 before it can undergo next on-shell interaction Any multiple interactions of electron within ~1 / me of BH are off-shell intera ...
... dform ~1 / me in CM frame BUT average angle between final on-shell electron and photon is φav~ me / 2E so dform ~E / me2 in CM frame Electron must travel dform ~E / me2 before it can undergo next on-shell interaction Any multiple interactions of electron within ~1 / me of BH are off-shell intera ...
How Matter Emits Light: 1. the Blackbody Radiation
... After it becomes hot, keep the temperature constant (this is called thermal equilibrium) Then plot, on a graph, the intensity of the radiation (light) emitted as a function of wavelength: this is called a spectrum The shape of the spectrum and the maximum intensity of a Blackbody will only depend on ...
... After it becomes hot, keep the temperature constant (this is called thermal equilibrium) Then plot, on a graph, the intensity of the radiation (light) emitted as a function of wavelength: this is called a spectrum The shape of the spectrum and the maximum intensity of a Blackbody will only depend on ...
1 Ay 124 Winter 2016 – HOMEWORK #3
... km s−1 , and are also rotating about the nucleus at 150 km s−1 . The total luminosity from within 1 arc second is 3 × 106 LV . a) Calculate the total mass, and the mass to light ratio, in the inner arcsecond of M31. Assuming that the density in the nucleus of M31 scales as ρ ∝ r−2 for radii larger ...
... km s−1 , and are also rotating about the nucleus at 150 km s−1 . The total luminosity from within 1 arc second is 3 × 106 LV . a) Calculate the total mass, and the mass to light ratio, in the inner arcsecond of M31. Assuming that the density in the nucleus of M31 scales as ρ ∝ r−2 for radii larger ...
Lecture Presentation
... Using Blackbody calculator from Spectracalc – Step 3 • What is total band radiance (radiant flux) received at the top – radiation from black body plus radiation form the medium with 0.3 absorptivity? • What is the brightness temperature of the radiation received? ...
... Using Blackbody calculator from Spectracalc – Step 3 • What is total band radiance (radiant flux) received at the top – radiation from black body plus radiation form the medium with 0.3 absorptivity? • What is the brightness temperature of the radiation received? ...
Types of radiation
... cell. If hit, a cell will most likely die. Because of their size they damage the first thing they hit (they aren’t likely to squeeze through gaps) ...
... cell. If hit, a cell will most likely die. Because of their size they damage the first thing they hit (they aren’t likely to squeeze through gaps) ...
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.