Prohlížení Acta Polytechnica. 2013, vol. 53, Supplement dle názvu
Zobrazují se záznamy 48-67 z 68
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TeV GAMMA RAYS: OBSERVATIONS VERSUS EXPECTATIONS & THEORY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The scope of this paper is to discuss two important questions relevant for TeV γ-ray astronomy; the pursuit to reveal the origin of cosmic rays in our galaxy, and the opacity of the universe in γ-rays. The origin of cosmic ... -
THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS
(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 ASTRO-H MISSION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)A review of the Astro-H mission is presented here on behalf of the Astro-H collaboration. The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions initiated by the Institute of Space ... -
THE AUGER ENGINEERING RADIO ARRAY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The Auger Engineering Radio Array currently measures MHz radio emission from extensive air showers induced by high energy cosmic rays with 24 self-triggered radio detector stations. Its unique site, embedded into the ... -
THE DISCOVERY OF THE CHANDRASEKHAR MASS AND THE CHANDRASEKHAR-EDDINGTON CONTROVERSY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The so called Chandrasekhar limiting mass is a a quantum mechanical relativistic effect. The discovery and establishment of the concept involved a major controversy between the young Chandrasekhar and the hilarious Eddington. ... -
THE FIRST CENTURY OF COSMIC RAYS, AN HISTORICAL OVERVIEW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The 1912 balloon flights of Victor Hess and related activities in those years are reviewed. Subsequent research during the early 20th Century is noted, including the discovery of the positron, mesons, and air showers. The ... -
THE FIRST STARS
(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 ... -
THE GERDA EXPERIMENT: STATUS AND FUTURE PLANS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The GERDA experiment is searching for the neutrinoless double beta decay of 76Ge. An observation of the neutrinoless double beta decay will not only prove lepton number violation by two units, but also that the neutrino ... -
THE HISTORY OF THE S PROCESS AND ITS PRESENT STATE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We review the history and the present status of the s-process and point to problems in need of clarification. In some cases it has to do with lack of experimental data and in other the theory is missing. -
THE IMPACT OF SUZAKU MEASUREMENTS ON ASTROPARTICLE PHYSICS
(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 ... -
THE JEM-EUSO MISSION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The JEM-EUSO mission explores the origin of the extreme energy cosmic rays (EECRs) above 50EeV and explores the limits of the fundamental physics, through the observations of their arrival directions and energies. It is ... -
THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The status of the Mass Composition measurements of Ultra High Energy Cosmic Rays is presented, with emphasis on the results from the Fluorescence Detector of the Pierre Auger Observatory. Possible consequences of the present ... -
THE NA62 EXPERIMENT AT CERN AND THE MEASUREMENT OF THE ULTRA-RARE DECAY K⁺→π⁺ v ̄v
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The NA62 experiment at CERN aims at the very challenging task of measuring with 10% relative error the Branching Ratio of the ultra-rare decay of the K+ into π+ ν¯ν which is expected to occur only in about 8 out of 1011 ... -
THE PAST AND THE FUTURE OF DIRECT SEARCH OF GW FROM PULSARS IN THE ERA OF GW ANTENNAS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In this paper we will give an overview of the past and present status of Gravitational Wave (GW) research associated with pulsars, taking into account the target sensitivity achieved from interferometric laser GW antennas ... -
THE SEARCH FOR BLAZARS AMONG THE UNIDENTIFIED EGRET gamma-RAY SOURCES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In this paper we report the results of a multi-wavelength follow-up study of selected flat spectrum extragalactic radio-optical counterparts within the error boxes of 13 unidentified EGRET sources. Two of these previously ... -
THE SENSITIVITY OF THE GREENHOUSE EFFECT TO CHANGES IN THE CONCENTRATION OF GASES IN PLANETARY ATMOSPHERES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We present a radiative transfer model for Earth-Like-Planets (ELP). The model allows the assessment of the effect of a change in the concentration of an atmospheric component, especially a greenhouse gas (GHG), on the ... -
THE SZ EFFECT IN THE PLANCK ERA: ASTROPHYSICAL AND COSMOLOGICAL IMPACT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The Sunyaev–Zel’dovich effect (SZE) is a relevant probe for cosmology and particle astrophysics. The Planck Era marks a definite step forward in the use of this probe for astrophysics and cosmology. Astrophysical applications ... -
THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU
(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. ... -
ULTRAHIGH ENERGY COSMIC RAYS: REVIEW OF THE CURRENT SITUATION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We describe the current situation of the data on the highest energy particles in the Universe – the ultrahigh energy cosmic rays. The new results in the field come from the Telescope Array experiment in Utah, U.S.A. For ... -
WHAT IS NEW IN ASTROPARTICLE PHYSICS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In this brief review paper I will point to the most important steps that have been made in recent decades toward a better understanding of the physics governing our Universe. Because of the limited length of this paper, I ...