Prohlížení Acta Polytechnica CTU Proceedings. 2014, vol. 1, no. 1 dle názvu
Zobrazují se záznamy 18-37 z 62
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Data Analysis of Globular Cluster Harris Catalogue in View of the King Models and Their Dynamical Evolution. I. Theoretical model
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We discuss the possibility to analyze the problem of gravothermal catastrophe in a new way, by obtaining thermodynamical equations to apply to a selfgravitating system. By using the King distribution function in the framework ... -
Data Analysis of Globular Cluster Harris Catalogue in View of the King Models and Their Dynamical Evolution. II. Observational Evidences
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We summarize some observational comparison concerning the features of globular clusters (GCs) population in connection to the evolution of King models. We also make a comparison with some extragalactic GCs systems, in order ... -
Design and Tests of the Hard X-ray Polarimeter X-Calibur
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)X-ray polarimetry promises to give qualitatively new information bout high-energy astrophysical sources, such as binary black hole systems, micro-quasars, active galactic nuclei, and gamma-ray bursts. We designed, built ... -
Electron Acceleration in Supernovae and Millimeter Perspectives
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Supernovae launch a strong shock wave by the interaction of the expanding ejecta and surrounding circumstellar matter (CSM). At the shock, electrons are accelerated to relativistic speed, creating observed synchrotron ... -
Evolution of Massive Population III Stars
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)While the evolution of massive stars in the local Universe is dominated by mass-loss, the evolution of massive Population III stars should be dominated by rotation. An important effect of rotation is rotationally-induced ... -
Expected Hard X-Ray and Soft Gamma-Ray from Supernovae
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)High energy emissions from supernovae (SNe), originated from newly formed radioactive species, provide direct evidence of nucleosynthesis at SN explosions. However, observational diculties in the MeV range have so far ... -
Final Remarks
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014) -
First Hints of Pressure Waves in a Helical Extragalactic Jet: S5 0836+710
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)One of the open questions in extragalactic jet Astrophysics is related to the nature of the observed radio jet, namely whether it traces a pattern or the flow structure itself. In this paper I summarize the evidence collected ... -
Forty Years of X-Raying Narrow-Line Seyfert 1 Galaxies
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Forty years after the discovery of Narrow-Line Seyfert 1 Galaxies (NLS1s), and 20 years since the discovery of the remarkable ultrasoft soft X-ray emissions of NLS1s, strategic publications improved the understanding of ... -
Fullerenes, PAHs, Amino Acids and High Energy Astrophysics
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We present theoretical, observational and laboratory work on the spectral properties of fullerenes and hydrogenated fullerenes. Fullerenes in its various forms (individual, endohedral, hydrogenated, etc.) can contribute ... -
Gamma-rays, Neutrinos and Particle Astronomy as Messengers of the Universe
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Observations of charged cosmic-rays, γ-rays and neutrino are possible thanks to the availability of new detectors coming from technologies typical of experimental particle physics. In conjunction with more traditional ... -
Gravitational Waves and Dark Energy
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)The idea that dark energy is gravitational waves may explain its strength and its time-evolution. A possible concept is that dark energy is the ensemble of coherent bursts (solitons) of gravitational waves originally ... -
HAVmS: Highly Available Virtual Machine Computer System Fault Tolerant with Automatic Failback and Close to Zero Downtime
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)In scientic computing, systems often manage computations that require continuous acquisition of of satellite data and the management of large databases, as well as the execution of analysis software and simulation models ... -
High-Resolution X-Ray Spectroscopy of Galactic Supernova Remnants
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)High-resolution X-ray spectroscopy of Galactic supernova remnants (SNRs), based on grating spectrometers onboard XMM-Newton and Chandra, has been revealing a variety of new astrophysical phenomena. Broadened oxygen lines ... -
Highly Magnetized Accreting Pulsars: Are There Accreting Magnetars?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)2S 0114+650, GX 301-2, IGR J16358-4726, X Per, 4U 2206+54, SXP 1062, and 3A 1954+319 are thought to possess high magnetic elds. They have recently been named accreting magnetars, or highly magnetized accreting pulsars. In ... -
Latest Results from the Fermi Gamma-Ray Telescope
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Can we learn about New Physics with astronomical and astro-particle data? Since its launch in 2008, the Large Area Telescope, onboard of the Fermi Gamma-ray Space Telescope, has detected the largest amount of gamma rays ... -
LHC, Astrophysics and Cosmology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)In this paper we discuss the impact on cosmology of recent results obtained by the LHC (Large Hadron Collider) experiments in the 2011-2012 runs, respectively at √s = 7 and 8 TeV. The capital achievement of LHC in this ... -
Magnetorotational Explosions of Core-Collapse Supernovae
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Core-collapse supernovae are accompanied by formation of neutron stars. The gravitation energy is transformed into the energy of the explosion, observed as SN II, SN Ib,c type supernovae. We present results of 2-D MHD ... -
Mass Accretion Processes in Young Stellar Objects: Role of Intense Flaring Activity
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)According to the magnetospheric accretion scenario, young low-mass stars are surrounded by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its nal mass and is ... -
Modelling the Multifrequency SED of AGN Candidates among the Unidentied EGRET and Fermi Gamma-Ray Sources
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Of the 271 sources in the 3rd EGRET catalogue, 131 were reported as unidentied, i.e. not associated with any particular class of point source in the sky. Since the largest fraction of the EGRET sources were extragalactic, ...