Light and Telescopes
... 1. The visible part of the electromagnetic spectrum can be divided into seven color bands of Red, Orange, Yellow, Green, Blue, Indigo, and Violet (from long to short wavelength). A single photon of which of these colors has the greatest amount of energy? ...
... 1. The visible part of the electromagnetic spectrum can be divided into seven color bands of Red, Orange, Yellow, Green, Blue, Indigo, and Violet (from long to short wavelength). A single photon of which of these colors has the greatest amount of energy? ...
Comparing an Analytical Cascade Spectrum of High Energy Gamma
... synchrotron radiation in local magnetic fields or through inverse Compton scattering. In all cases, electrons transfer a sizeable portion of their energy to a photon which could emerge as a gamma ray. So while cosmic accelerators are thought to accelerate charged particles, these in turn produce gam ...
... synchrotron radiation in local magnetic fields or through inverse Compton scattering. In all cases, electrons transfer a sizeable portion of their energy to a photon which could emerge as a gamma ray. So while cosmic accelerators are thought to accelerate charged particles, these in turn produce gam ...
Science: Single Award Unit 3 (Physics) Higher Tier
... Explain fully how the rays in a microwave oven heat food. ...
... Explain fully how the rays in a microwave oven heat food. ...
3011800000360
... both models, as the irradiation has no significant effect on the disk midplane temperatures. In the hydrogen disk models employed to account for the observed outbursts of dwarf novae and soft X-ray transients, the disk has two states. The viscosity parameter is large (small) when the effective tem ...
... both models, as the irradiation has no significant effect on the disk midplane temperatures. In the hydrogen disk models employed to account for the observed outbursts of dwarf novae and soft X-ray transients, the disk has two states. The viscosity parameter is large (small) when the effective tem ...
Slides
... Improving the performance of mirrors and making prototype for LAMP Improving the performance of mirrors and making prototype of a telescope for XTP ...
... Improving the performance of mirrors and making prototype for LAMP Improving the performance of mirrors and making prototype of a telescope for XTP ...
radiation and matter interaction in strong magnetic field of accreting
... This thesis focuses on the theoretical study of radiation and matter interaction in the vicinity of strongly magnetized neutron stars (NSs). NSs give us a unique possibility to study physical processes in such extreme conditions (huge temperatures, densities and magnetic fields) which by no means ca ...
... This thesis focuses on the theoretical study of radiation and matter interaction in the vicinity of strongly magnetized neutron stars (NSs). NSs give us a unique possibility to study physical processes in such extreme conditions (huge temperatures, densities and magnetic fields) which by no means ca ...
Gravitational Wave interferometric detectors Gabriela González
... seismic noise, brownian motion,… independent of arm length, but picked up in each “bounce”. → make the interferometer long! “Generic” PSD: h~10-21, 3km => x ≤ 10-19 m seismic δh 2 ( f ) ...
... seismic noise, brownian motion,… independent of arm length, but picked up in each “bounce”. → make the interferometer long! “Generic” PSD: h~10-21, 3km => x ≤ 10-19 m seismic δh 2 ( f ) ...
aas.hashville.28may03 - Cornell Astronomy
... drive the trend toward data mining of » petabyte databases. The transient radio sky (e.g. t < 1 month) is largely unexplored. New objects/phenomena are likely to be discovered as well as extreme cases in predictable classes of objects. ...
... drive the trend toward data mining of » petabyte databases. The transient radio sky (e.g. t < 1 month) is largely unexplored. New objects/phenomena are likely to be discovered as well as extreme cases in predictable classes of objects. ...
Fermi Fact Sheet - Fermi Gamma-ray Space Telescope
... notable source except for one thing: It’s the only one that moves across the sky. The Sun’s annual motion against the background sky is a reflection of Earth’s orbit around the Sun. The gamma rays Fermi now sees from the Sun actually come from high-speed particles colliding with the Sun’s gas and li ...
... notable source except for one thing: It’s the only one that moves across the sky. The Sun’s annual motion against the background sky is a reflection of Earth’s orbit around the Sun. The gamma rays Fermi now sees from the Sun actually come from high-speed particles colliding with the Sun’s gas and li ...
Types of Spectroscopy
... visible spectrum, and high frequencies at the violet end of the visible spectrum which includes Xrays and Gamma rays. ...
... visible spectrum, and high frequencies at the violet end of the visible spectrum which includes Xrays and Gamma rays. ...
HIGH-ENERGY ASTROPHYSICS AND AXION
... jet base undergo the process γγ → e + e − . So, the FSRQs should be INVISIBLE in the gamma-ray band above 20 GeV. ...
... jet base undergo the process γγ → e + e − . So, the FSRQs should be INVISIBLE in the gamma-ray band above 20 GeV. ...
Modeling non-thermal emission from stellar bow shocks
... bow shock with Suzaku. From their observation, they obtained an X-ray luminosity lower limit at 1.1 × 1032 erg s−1 , well over our predictions. ...
... bow shock with Suzaku. From their observation, they obtained an X-ray luminosity lower limit at 1.1 × 1032 erg s−1 , well over our predictions. ...
The imprint of the crustal magnetic field on the thermal
... on the location of currents and where the dissipated magnetic energy is deposited. Eventually, an inversion of the angular temperature anisotropy in the crust can happen. However, this effect is filtered by the envelope: the blanketing effect of the envelope may reestablish the typical hot poles+col ...
... on the location of currents and where the dissipated magnetic energy is deposited. Eventually, an inversion of the angular temperature anisotropy in the crust can happen. However, this effect is filtered by the envelope: the blanketing effect of the envelope may reestablish the typical hot poles+col ...
GRB 130603B: No Compelling Evidence for Neutron Star Merger
... mergers in close binaries were originally suggested by Goodman et al. [1] as possible sources of cosmological gamma ray bursts. However, their proposed underlying mechanism—a spherical fireball produced by neutrino-antineutrino annihilation into electron positron pairs beyond the surface of the coll ...
... mergers in close binaries were originally suggested by Goodman et al. [1] as possible sources of cosmological gamma ray bursts. However, their proposed underlying mechanism—a spherical fireball produced by neutrino-antineutrino annihilation into electron positron pairs beyond the surface of the coll ...
Geomagnetism and Aeronomy, 2016, Vol. 56, № 7, pp. 1
... Proximity to the Sun will enable imaging of the solar atmosphere with spatial resolution improved with respect to the resolution available at 1 AU. Out-of-ecliptic observations of the Sun from small heliocentric distances will allow to investigate solar polar regions in details. Changing of the spac ...
... Proximity to the Sun will enable imaging of the solar atmosphere with spatial resolution improved with respect to the resolution available at 1 AU. Out-of-ecliptic observations of the Sun from small heliocentric distances will allow to investigate solar polar regions in details. Changing of the spac ...
Exposure Time Calculator for LUCI - USER MANUAL
... SNRDIT : signal-to-noise ratio for 1 DIT In imaging mode the user will be asked for the signal-to-noise ratio for the exposure time τ (SN Rτ ). The ETC calculates the necessary exposure time to ...
... SNRDIT : signal-to-noise ratio for 1 DIT In imaging mode the user will be asked for the signal-to-noise ratio for the exposure time τ (SN Rτ ). The ETC calculates the necessary exposure time to ...
microquasars
... Mirabel & Luis Rodriguez, 1994 THE PLASMA THAT RADIATES IN THE HARD X-RAYS IS BLOWN IN SUPERLUMINAL JETS ...
... Mirabel & Luis Rodriguez, 1994 THE PLASMA THAT RADIATES IN THE HARD X-RAYS IS BLOWN IN SUPERLUMINAL JETS ...
Breaks in gamma-ray spectra of distant blazars and transparency of
... and a few TeV interact mostly with infrared background photons whose amount is poorly known experimentally but safely constrained from below by account of the contribution of observed light from known galaxies2 . The expected opacity of the intergalactic space limits the mean free path of TeV gamma ...
... and a few TeV interact mostly with infrared background photons whose amount is poorly known experimentally but safely constrained from below by account of the contribution of observed light from known galaxies2 . The expected opacity of the intergalactic space limits the mean free path of TeV gamma ...
Black Hole Accretion
... We have tried a variety of accretion rates (0.001 -- 1 LEdd) and NS radii (1.6 -- 4 Schw. radii, i.e., 6.5 -- 16 km), for three choices of the core temperature ...
... We have tried a variety of accretion rates (0.001 -- 1 LEdd) and NS radii (1.6 -- 4 Schw. radii, i.e., 6.5 -- 16 km), for three choices of the core temperature ...
Low-energy charged particle measurement by MAP-PACE onboard SELENE
... from the lunar surface are mainly composed of neutrals, which are ionized by solar photons and electrons. Both ionized particles and sputtered/desorped ions are accelerated and transported by the solar wind in cycloidal motion. These ions will be observed by the in-situ low-energy ion measurement by ...
... from the lunar surface are mainly composed of neutrals, which are ionized by solar photons and electrons. Both ionized particles and sputtered/desorped ions are accelerated and transported by the solar wind in cycloidal motion. These ions will be observed by the in-situ low-energy ion measurement by ...
Telescopes - UMass Astronomy
... Atmospheric seeing Blurring by air currents in atmosphere usually smears images over several arc-seconds ⇒ seeing Best sites: 0.5-1 arc second Atmospheric seeing limits the angular resolution of ground-based optical telescopes Solutions: 1. Put telescope in Earth orbit (hard, $$$) 2. Adaptively ben ...
... Atmospheric seeing Blurring by air currents in atmosphere usually smears images over several arc-seconds ⇒ seeing Best sites: 0.5-1 arc second Atmospheric seeing limits the angular resolution of ground-based optical telescopes Solutions: 1. Put telescope in Earth orbit (hard, $$$) 2. Adaptively ben ...
FINAL Figer White Paper - RIT
... The detector will be quantum-limited (zero read noise), be resilient against the harsh effects of radiation in space, consume low power, operate over an extremely high dynamic range, and be able to operate with exposure times over one million times faster than typical digital cameras. Now is the tim ...
... The detector will be quantum-limited (zero read noise), be resilient against the harsh effects of radiation in space, consume low power, operate over an extremely high dynamic range, and be able to operate with exposure times over one million times faster than typical digital cameras. Now is the tim ...
Contents
... Most atoms in the Sun, and other stars, are said to be ionized because the intense temperatures have stripped off most of their electrons. Electron scattering occurs when a photon encounters an electron and causes it to vibrate or oscillate. The energy stolen from the photon in this process is re-ra ...
... Most atoms in the Sun, and other stars, are said to be ionized because the intense temperatures have stripped off most of their electrons. Electron scattering occurs when a photon encounters an electron and causes it to vibrate or oscillate. The energy stolen from the photon in this process is re-ra ...
Cool Stars in the Galaxy — A ROSAT and ASCA View.
... This thesis deals mainly with emission from stellar sources, however an understanding of the solar corona is useful when considering the stellar equivalents. Figure 1.1 shows a soft X-ray image of the solar corona obtained using the Japanese Yohkoh satellite. The bright regions are active (emit in t ...
... This thesis deals mainly with emission from stellar sources, however an understanding of the solar corona is useful when considering the stellar equivalents. Figure 1.1 shows a soft X-ray image of the solar corona obtained using the Japanese Yohkoh satellite. The bright regions are active (emit in t ...
X-ray astronomy detector
X-ray astronomy detectors are instruments that detect X-rays for use in the study of X-ray astronomy.X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray emission from celestial objects. X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites. X-ray astronomy is part of space science.X-ray astronomy detectors have been designed and configured primarily for energy and occasionally for wavelength detection using a variety of techniques usually limited to the technology of the time.