Prohlížení Acta Polytechnica. 2013, vol. 53, Supplement dle názvu

Zobrazují se záznamy 7-26 z 68

    • COMPUTATIONAL SCHEMES FOR THE PROPAGATION OF ULTRA HIGH ENERGY COSMIC RAYS 

      Autor: Aloisio, Roberto
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We discuss the problem of ultra high energy particles propagation in astrophysical backgrounds. We present two different computational schemes based on kinetic and Monte Carlo approaches. The kinetic approach is an analytical ...

    • CONSTRAINING SPACETIME TORSION WITH THE MOON, MERCURY AND LAGEOS 

      Autor: March, Riccardo; Bellettini, Giovanni; Tauraso, Roberto; Dell’Agnello, Simone
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider an extension of Einstein General Relativity where, beside the Riemann curvature tensor, we suppose the presence of a torsion tensor. Using a parametrized theory based on symmetry arguments, we report on some ...

    • CP VIOLATIONS (AND MORE) AFTER THE FIRST TWO YEARS OF LHCB 

      Autor: Auriemma, Giulio
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The most interesting cosmological open problems, baryon asymmetry, dark matter, inflation and dark energy, are not explained by the standard model of particle physics (SM). The finalgoal of the Large Hadron Collider an ...

    • DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO 

      Autor: Bernabei, R.; Belli, P.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Dai, C. J.; d’Angelo, A.; Di Marco, A.; He, H. L.; Incicchitti, A.; Ma, X. H.; Montecchia, F.; Sheng, X. D.; Wang, R. G.; Ye, Z. P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Experimental efforts and theoretical developmens support that most of the Universe is Dark and a large fraction of it should be made of relic particles; many possibilities are open on their nature and interaction types. ...

    • DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES 

      Autor: Bisnovatyi-Kogan, Gennady S.; Chernin, Artur; Merafina, Marco
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We study physics of clusters of galaxies embedded in the cosmic dark energy background. The equilibrium and stability of polytropic spheres with equation of state of the matter             P = Kpγ, γ = 1 + 1/n, in presence ...

    • DETECTION OF A CHANGE OF SLOPE IN THE SPECTRUM OF HEAVY MASS COSMIC RAYS PRIMARIES BY THE KASCADE-GRANDE EXPERIMENT 

      Autor: Chiavassa, A.; Apel, W. D.; Arteaga-Velázquez, J. C.; Bekk, K.; Bertaina, M.; Blümer, J.; Bozdog, H.; Brancus, I. M.; Cantoni, E.; Cossavella, F.; Daumiller, K.; de Souza, V.; Di Pierro, F.; Doll, P.; Engel, R.; Engler, J.; Finger, M.; Fuchs, B.; Fuhrmann, D.; Garino, F.; Gils, H. J.; Glasstetter, R.; Grupen, C.; Haungs, A.; Heck, D.; Hörandel, J. R.; Huber, D.; Huege, T.; Kampert, K.-H.; Kang, D.; Klages, H. O.; Link, K.; Łuczak, P.; Ludwig, M.; Mathes, H. J.; Mayer, H. J.; Melissas, M.; Milke, J.; Mitrica, B.; Morello, C.; Oehlschläger, J.; Ostapchenko, S.; Palmieri, N.; Petcu, M.; Pierog, T.; Rebel, H.; Roth, M.; Schieler, H.; Schoo, S.; Schröder, F. G.; Sima, O.; Toma, G.; Trinchero, G. C.; Ulrich, H.; Weindl, A.; Wochele, J.; Wommer, M.; Zabierowski, J.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      KASCADE-Grande is an extensive air shower experiment devoted to the study of cosmic rays in the 1016 ÷ 1018 eV energy range. The array is composed by different detectors allowing independent measurements of the number of ...

    • DISC ATMOSPHERES AND WINDS IN X-RAY BINARIES 

      Autor: Díaz Trigo, Maria; Boirin, Laurence
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We review the current status of studies of disc atmospheres and winds in low mass X-ray binaries. We discuss the possible wind launching mechanisms and compare the predictions of the models with the existent observations. ...

    • DO WE SEE THE ‘IRON PEAK’? 

      Autor: Erlykin, Anatoly D.; Wolfendale, Arnold W.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Recent measurements of the cosmic ray (CR) energy spectrum in the PeV region and above have confirmed the remarkable sharpness of the knee and revealed another structure at about 70PeV which we call the ‘Iron Peak’. The ...

    • EROSITA: AGN SCIENCE, BACKGROUND DETERMINATION, AND OPTICAL FOLLOW-UP SPECTROSCOPY 

      Autor: Boller, Thomas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      More than 20 years after the highly impacting ROSAT all-sky survey in the soft X-ray spectral range, we are close to the next major X-ray all/sky surveys with eROSITA. eROSITA will be the primary instrument on-board the ...

    • FROM GALACTIC TO EXTRAGALACTIC JETS: A REVIEW 

      Autor: Beall, James H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      An analysis of the data that have recently become available from observing campaigns, including VLA, VLBA, and satellite instruments, shows some remarkable similarities and significant differences in the data from some ...

    • GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION 

      Autor: Sasaki, Manami
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to ...

    • GRB INVESTIGATIONS BY ESA GAIA AND LOFT 

      Autor: Hudec, René; Šimon, Vojtech; Hudec, Lukáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The possibility of studying GRBs with the ESA Gaia and LOFT missions is briefly addressed. The ESA Gaia satellite to be launched in November 2013 will focus on high precision astrometry of stars and all objects down to ...

    • HIGHLIGHTS FROM THE LHC 

      Autor: Straessner, Arno
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The Large Hadron Collider (LHC) and the two multi-purpose detectors, ATLAS and CMS, have been operated successfully at record centre-of-mass energies of 7 ÷ 8TeV. This paper presents the main physics results from proton–proton ...

    • ICECUBE OBSERVATORY: NEUTRINOS AND THE ORIGIN OF COSMIC RAYS 

      Autor: Desiati, Paolo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The completed IceCube Observatory, the first km3 neutrino telescope, is already providing the most stringent limits on the flux of high energy cosmic neutrinos from point-like and diffuse galactic and extra-galactic sources. ...

    • INFLUENCE OF THE RESULTS OF UHECR DETECTION ON THE LHC EXPERIMENTS 

      Autor: Petrukhin, Anatoly A.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The cosmic ray energy region 1015 ÷ 1017TeV corresponds to LHC energies 1 ÷ 14TeV in the center-of-mass system. The results obtained in cosmic rays (CR) in this energy interval can therefore be used for developing new ...

    • INVESTIGATING THE Ep, i –Eiso CORRELATION 

      Autor: Amati, Lorenzo; Dichiara, Simone
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The correlation between the spectral peak photon energy, Ep, and the radiated energy or luminosity (i.e., the “Amati relation” and other correlations derived from it) is one of the central and most debated topics in GRB ...

    • LARGE AREA HODOSCOPES FOR MUON DIAGNOSTICS OF HELIOSPHERE AND EARTH’S MAGNETOSPHERE 

      Autor: Yashin, I. I.; Ampilogov, N. V.; Astapov, I.I.; Barbashina, N.S.; Borog, V.V.; Dmitrieva, A.N.; Kokoulin, R.P.; Kompaniets, K.G.; Mannocchi, G.; Mikhailenko, A.S.; Petrukhin, A.A.; Saavedra, O.; Shutenko, V.V.; Trinchero, G.; Yakovleva, E.I.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Muon diagnostics is a technique for remote monitoring of active processes in the heliosphere and the magnetosphere of the Earth based on the analysis of angular variations of muon flux simultaneously detected from all ...

    • LIMIT ON UHE NEUTRINO FLUXES FROM THE PIERRE AUGER OBSERVATORY 

      Autor: Maldera, S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The surface detector of the Pierre Auger Observatory is sensitive to Ultra High Energy (UHE) neutrinos. Neutrinos of all flavors can interact in the atmosphere producing inclined showers near the ground. Moreover, ultra ...

    • MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN 

      Autor: Brenneman, Laura
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN. Recent ...

    • METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION 

      Autor: Lovisari, Lorenzo; Laganá, Tatiana F.; Borm, Katharina; Schellenberger, Gerrit; Reiprich, Thomas H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore ...