SGR and AXP – are they magnetars?
... above their magnetic poles. Popular theories of the emission mechanism require continuous electron-positron pair production, with the potential responsible for accelerating the particles being inversely related to the spin period. Pair production will stop when the potential drops below a threshold, ...
... above their magnetic poles. Popular theories of the emission mechanism require continuous electron-positron pair production, with the potential responsible for accelerating the particles being inversely related to the spin period. Pair production will stop when the potential drops below a threshold, ...
Accretion
... • Hence the disk material is in circular Keplerian orbits with angular velocity WK = (GM/R3)1/2 = v/R • Energy of particle with mass m in the Kepler orbit of radius R just grazing the compact object is ...
... • Hence the disk material is in circular Keplerian orbits with angular velocity WK = (GM/R3)1/2 = v/R • Energy of particle with mass m in the Kepler orbit of radius R just grazing the compact object is ...
Millisecond Pulsar Binaries at Transition
... Disk disappearance occurred at the end of 2012 (Bassa et al. 2014) ...
... Disk disappearance occurred at the end of 2012 (Bassa et al. 2014) ...
Analysis of Point-Like Sources Kenny J. Glotfelty
... PKS 0637-752 was selected as the calibration source to focus the telescope based on previous observations from other X-ray missions that showed it to be an isolated point source. When the object was first imaged by Chandra during its Orbital Activation and Checkout phase, the nearby extended emissio ...
... PKS 0637-752 was selected as the calibration source to focus the telescope based on previous observations from other X-ray missions that showed it to be an isolated point source. When the object was first imaged by Chandra during its Orbital Activation and Checkout phase, the nearby extended emissio ...
RADIATIVE RECOMBINATION AND
... impurity ions occurring in plasmas. To date we calculated the subshell RRCSs and PCSs and total RRCSs for 31 ions of Fe, Ni, Cu, Mo, and W which are most important in fusion studies. The ionic states of the heavy element impurities which are of the most importance in fusion study, are the following ...
... impurity ions occurring in plasmas. To date we calculated the subshell RRCSs and PCSs and total RRCSs for 31 ions of Fe, Ni, Cu, Mo, and W which are most important in fusion studies. The ionic states of the heavy element impurities which are of the most importance in fusion study, are the following ...
Earth`s Atmosphere & Telescopes
... • X-ray telescopes do not generate X-rays they only detect the Xrays generated by stars, planets, galaxies, black holes, etc. ...
... • X-ray telescopes do not generate X-rays they only detect the Xrays generated by stars, planets, galaxies, black holes, etc. ...
talk
... • Optical imaging with capillary plate, argon-TMA and intensified CCD. – T. Masuda, H. Sakurai, Y. Inoue, S. Gunji and K. Asamura, IEEE TNS ...
... • Optical imaging with capillary plate, argon-TMA and intensified CCD. – T. Masuda, H. Sakurai, Y. Inoue, S. Gunji and K. Asamura, IEEE TNS ...
No Slide Title - Harvard-Smithsonian Center for Astrophysics
... Ansatz: accretion stream impacts make waves • The impact of inhomogeneous “clumps” on the stellar surface can generate MHD waves that propagate out horizontally and enhance existing surface turbulence. ...
... Ansatz: accretion stream impacts make waves • The impact of inhomogeneous “clumps” on the stellar surface can generate MHD waves that propagate out horizontally and enhance existing surface turbulence. ...
Multi-Wavelength Observations of Known, and Searches
... 1FGL J1018.6-5856 Overview 1FGL J1018.6-5856 was the frst new gamma-ray binary found with Fermi. X-ray, optical, and radio counterparts were identifed. We don't defnitely know what is driving the gamma-ray emission. ...
... 1FGL J1018.6-5856 Overview 1FGL J1018.6-5856 was the frst new gamma-ray binary found with Fermi. X-ray, optical, and radio counterparts were identifed. We don't defnitely know what is driving the gamma-ray emission. ...
Current results of data analysis on big interferometers
... Michelson interferometer with a 4 km long Fabry–Perot cavity of finesse 220 placed in each arm to increase the sensitivity of the detector. Each mirror of the interferometer has mass M = 10.8 kg, and is suspended from a vibrationisolated platform on a fine wire to form a pendulum with frequency 0.74 ...
... Michelson interferometer with a 4 km long Fabry–Perot cavity of finesse 220 placed in each arm to increase the sensitivity of the detector. Each mirror of the interferometer has mass M = 10.8 kg, and is suspended from a vibrationisolated platform on a fine wire to form a pendulum with frequency 0.74 ...
Sample
... that students understand these sections. First, you will have to mention the wave–particle duality of light. In the first part of the chapter, light is considered a wave. However, to discuss the formation of spectral lines, we consider the particle nature of light. If students have no trouble with t ...
... that students understand these sections. First, you will have to mention the wave–particle duality of light. In the first part of the chapter, light is considered a wave. However, to discuss the formation of spectral lines, we consider the particle nature of light. If students have no trouble with t ...
transparencies
... • Up to 1032 ergs released (between few minuts to tens of minuts) • Large flare at maximum of solar cycle • Observed smaller flares (in energy and time) • Located in solar corona and cromosphere • Heat plasma and accelerated electrons, protons and heavier nuclei ...
... • Up to 1032 ergs released (between few minuts to tens of minuts) • Large flare at maximum of solar cycle • Observed smaller flares (in energy and time) • Located in solar corona and cromosphere • Heat plasma and accelerated electrons, protons and heavier nuclei ...
Read the article
... smaller spiral (light months), seem to exist in the galactic center. Among the O/B stars moving close to SgrA* only S2 has been seen to complete two-third of its Keplerian orbit around SgrA* (Schödel et al. 2002). The Keplerian orbits of the other stars are more a matter of guess. Apart from S2, th ...
... smaller spiral (light months), seem to exist in the galactic center. Among the O/B stars moving close to SgrA* only S2 has been seen to complete two-third of its Keplerian orbit around SgrA* (Schödel et al. 2002). The Keplerian orbits of the other stars are more a matter of guess. Apart from S2, th ...
NEUTRINO TELESCOPES Teresa Montaruli University of Wisconsin - Madison
... Cut definition: cuts should be defining maximizing sensitivity or discovery potential prior looking at the effect on data that may include the signal Search of rare events: statistical fluctuation may bias the choice of experimenter so data challenge method helps when high statistics of equivalent s ...
... Cut definition: cuts should be defining maximizing sensitivity or discovery potential prior looking at the effect on data that may include the signal Search of rare events: statistical fluctuation may bias the choice of experimenter so data challenge method helps when high statistics of equivalent s ...
HAWC: A Next Generation All-Sky VHE Gamma
... Particle acceleration Physics of extreme objects – Supernova remnants – Active galactic nuclei – Gamma ray bursts ...
... Particle acceleration Physics of extreme objects – Supernova remnants – Active galactic nuclei – Gamma ray bursts ...
copyright 2002 scientific american, inc.
... through binoculars, it turned out to be the most brilliant explosion ever witnessed by humanity. We could see it nine billion light-years away, more than halfway across the observable universe. If the event had instead taken place a few thousand light-years away, it would have been as bright as the ...
... through binoculars, it turned out to be the most brilliant explosion ever witnessed by humanity. We could see it nine billion light-years away, more than halfway across the observable universe. If the event had instead taken place a few thousand light-years away, it would have been as bright as the ...
A Dozen Colliding-Wind X-Ray Binaries in the Star - UvA-DARE
... Figure 3. For a better comparison with previous observations, which were mostly done with the Einstein observatory, we calculate the luminosities over the same band. Although a source can be detected with only a few counts, e100 counts are required to fit a spectrum with any confidence. To estimate th ...
... Figure 3. For a better comparison with previous observations, which were mostly done with the Einstein observatory, we calculate the luminosities over the same band. Although a source can be detected with only a few counts, e100 counts are required to fit a spectrum with any confidence. To estimate th ...
Document
... temperature dependence of ~ T 4 Internal temperatures of more massive stars are only moderatly higher Luminosities much greater than can be explained by the T 4 dependence ...
... temperature dependence of ~ T 4 Internal temperatures of more massive stars are only moderatly higher Luminosities much greater than can be explained by the T 4 dependence ...
Spec Point Description Learnt Revised? Topic 1 – Visible Light and
... from radio waves to gamma rays, but the radiations within it can be grouped in order of decreasing wavelength and increasing frequency. Demonstrate an understanding that the potential danger associated with an electromagnetic wave increases with increasing frequency. ...
... from radio waves to gamma rays, but the radiations within it can be grouped in order of decreasing wavelength and increasing frequency. Demonstrate an understanding that the potential danger associated with an electromagnetic wave increases with increasing frequency. ...
The Nature of Electromagnetic Radiation
... returns to its lowest possible energy level (usually within a hundred-millionth of a second). On the way back to its ground level it must release energy, and it emits the energy as radiation that has the same wavelength as the radiation that first hit the atom. So if the atom is being given energy b ...
... returns to its lowest possible energy level (usually within a hundred-millionth of a second). On the way back to its ground level it must release energy, and it emits the energy as radiation that has the same wavelength as the radiation that first hit the atom. So if the atom is being given energy b ...
Constraining the instrinsic energy of GRB events
... where τ is the optical depth at the observer frame and τ ′ at the source one, δ = Γ(1−βµ) in concordance with the expression given by [8] (see also Piran & Shemi 1993). On the other hand, the relativistic transformation of specific intensity is derived in an elementary way by transforming the photon ...
... where τ is the optical depth at the observer frame and τ ′ at the source one, δ = Γ(1−βµ) in concordance with the expression given by [8] (see also Piran & Shemi 1993). On the other hand, the relativistic transformation of specific intensity is derived in an elementary way by transforming the photon ...
Future and Status of CANGAROO(Japan - side)
... Status Summary Analysis of stereo observations are now established, and application to other sources are underway. Sensitivity < 10%Crab (50h, small zenith, >600GeV) We reanalyze 1706 & 1006 C-III data in 2004 using present analysis method, and in 2008 final results about the inconsistency of those ...
... Status Summary Analysis of stereo observations are now established, and application to other sources are underway. Sensitivity < 10%Crab (50h, small zenith, >600GeV) We reanalyze 1706 & 1006 C-III data in 2004 using present analysis method, and in 2008 final results about the inconsistency of those ...
unit p1 – universal physics checklist
... Describe the use of other regions of the electromagnetic spectrum by some modern telescopes Describe the methods used to gather evidence for life beyond Earth, including space probes, soil experiments by landers, Search for Extraterrestrial Intelligence (SETI) Demonstrate an understanding of the imp ...
... Describe the use of other regions of the electromagnetic spectrum by some modern telescopes Describe the methods used to gather evidence for life beyond Earth, including space probes, soil experiments by landers, Search for Extraterrestrial Intelligence (SETI) Demonstrate an understanding of the imp ...
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.