Procházení Acta Polytechnica. 2013, vol. 53, Supplement dle data publikování

Zobrazují se záznamy 21-40 z 68

    • AGILE DATA CENTER AT ASDC AND AGILE HIGHLIGHTS 

      Autor: Pittori, Carlotta
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We present an overview of the main AGILE Data Center activities and the AGILE scientific highlights during the first 5 years of operations. AGILE is an ASI space mission in joint collaboration with INAF, INFN and CIFS, ...

    • MODELING JET INTERACTIONS WITH THE AMBIENT MEDIUM 

      Autor: Beall, J. H.; Guillory, J.; Rose, D. V.; Wolff, Michael T.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Recent high-resolution (see, e.g., [13]) observations of astrophysical jets reveal complex structures apparently caused by ejecta from the central engine as the ejecta interact with the surrounding interstellar material. ...

    • ACCRETION DISKS WITH A LARGE SCALE MAGNETIC FIELD AROUND BLACK HOLES 

      Autor: Bisnovatyi-Kogan, Gennady; Klepnev, Alexandr S.; Lovelace, Richard V.E.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider accretion disks around black holes at high luminosity, and the problem of the formation of a large-scale magnetic field in such disks, taking into account the non-uniform vertical structure of the disk. The ...

    • 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 ...

    • ARGO-YBJ: STATUS AND HIGHLIGHTS 

      Autor: Di Sciascio, Giuseppe
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The ARGO-YBJ experiment has been gathering data steadily since November 2007 at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300m a.s.l., 606 g/cm2). ARGO-YBJ is confronting various open problems in Cosmic Ray ...

    • 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. ...

    • POPULATION OF BLACK HOLES IN THE MILKY WAY AND IN THE MAGELLANIC CLOUDS 

      Autor: Ziółkowski, Janusz
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      In this review, I will briefly discuss the different types of black hole (BH) populations (supermassive, intermediate mass and stellar mass BHs) both in the Galaxy and in the Magellanic Clouds and compare them with each other.

    • 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. ...

    • NON-THERMAL EMISSION FROM CATACLYSMIC VARIABLES: IMPLICATIONS ON ASTROPARTICLE PHYSICS 

      Autor: Šimon, Vojtech
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We review the lines of evidence that some cataclysmic variables (CVs) are the sources of non-thermal radiation. It was really observed in some dwarf novae in outburst, a novalike CV in the high state, an intermediate polar, ...

    • THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU 

      Autor: Sato, Kosuke; Matsushita, Kyoko; Ishisaki, Yoshitaka; Yamasaki, Noriko Y.; Ohashi, Takaya
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We studied the properties of the intracluster medium (ICM) of galaxy clusters to outer regions observed with Suzaku. The observed temperature dropped by about ~30% from the central region to the virial radius of the clusters. ...

    • THE IMPACT OF SUZAKU MEASUREMENTS ON ASTROPARTICLE PHYSICS 

      Autor: Ota, Naomi
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Results from the Suzaku X-ray broad-band observations of clusters of galaxies are summarized. Aiming at understanding the physics of gas heating/particle acceleration and the cluster dynamical evolution, we search for ...

    • ASTRONOMICAL PLATE ARCHIVES AND SUPERMASSIVE BLACK HOLE BINARIES 

      Autor: Hudec, René
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The recent extensive digitisation of astronomical photographic plate archives, the development of new dedicated software and the use of powerful computers have for the first time enabled effective data mining in extensive ...

    • RX-J0852−4622: THE NEAREST HISTORICAL SUPERNOVA REMNANT – AGAIN 

      Autor: Aschenbach, Bernd
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      RX-J0852−4622, a supernova remnant, is demonstrated to be closer than 500 pc, based on the measurements of the angular radius, the angular expansion rate and the TeV g-ray flux. This is a new method of limiting the distance ...

    • SUPERNOVA 1987A: CELEBRATING A SILVER JUBILEE 

      Autor: Panagia, Nino
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The story of the SN 1987A explosion is briefly reviewed. Although this supernova was somewhat peculiar, the study of SN 1987A has clarified quite a number of important aspects of the nature and the properties of supernovae, ...

    • XMM-NEWTON SCIENTIFIC HIGHLIGHTS: X-RAY SPECTROSCOPIC POPULATION STUDIES OF AGN 

      Autor: Guainazzi, Matteo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      In this paper I review the contribution that the XMM-Newton ESA X-ray mission has given to our understanding of Active Galactic Nuclei, together with other operational, and complementary, X-ray facilities. I will focus on ...

    • 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 ...

    • 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 ...

    • 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 ...

    • THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS 

      Autor: Gustavino, Carlo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The 2H(α, γ)6Li reaction is the leading process for the production of 6Li in standard Big Bang Nucleosynthesis. Recent observations of lithium abundance in metal-poor halo stars suggest that there might be a 6Li plateau, ...

    • THE FIRST STARS 

      Autor: Whalen, Daniel J.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Pop III stars are the key to the character of primeval galaxies, the first heavy elements, the onset of cosmological reionization, and the seeds of supermassive black holes. Unfortunately, in spite of their increasing ...