Prohlížení Acta Polytechnica CTU Proceedings. 2014, vol. 1, no. 1 dle názvu
Zobrazují se záznamy 33-52 z 62
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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, ... -
Multi-Frequency Study of the SZ Effect in Cosmic Structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)The Sunyaev-Zel’dovich effect (SZE) is a relevant probe for cosmology and astrophysics. A multi-frequency approach to study the SZE in cosmic structures turns out to be crucial in the use of this probe for astrophysics and ... -
Multi-Wavelength View of Supernova Remnants
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)This contribution gives a very short overview on the emission of supernova remnants and the processes that are responsible for both the thermal and non-thermal origins of the emission, typically observed in radio, X-rays, ... -
Multifrequency Behaviour of the Gamma-Ray Binary System PSR B1259-63: Modelling the FERMI Flare
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)This paper presents a brief overview of the multifrequency properties of the gamma-ray binary system PSR B1259-63 from radio to very high energy gamma-rays. A summary is also presented of the various models put forward to ... -
Multiscale Modeling of Astrophysical Jets
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We are developing the capability for a multi-scale code to model the energy deposition rate and momentum transfer rate of an astrophysical jet which generates strong plasma turbulence in its interaction with the ambient ... -
Old and New from Multifrequency Astrophysics
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)In this short review paper we comment on some the most important steps that have been made in the past decades for a better understanding of the physics governing our Universe. The results we discuss come from the many ... -
Origin of X-ray Spectral Variation and the Seemingly Broad Iron-Line Spectral Feature in Seyfert Galaxies
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We present systematic X-ray data analysis of the Seyfert galaxies observed by Suzaku to study origin of their hard X-ray (2 - 40 keV) variations. In particular, we examine if the "Variable Partial Covering (VPC) model" ... -
Personal Conclusions
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)I present here some personal considerations on the main theoretical, observational and technological challenges offered to the discussion during the Meeting "Multifrequency Behaviour of High Energy Cosmic Sources". -
Planck 2013 Cosmology Results: a Review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)This talk presents an overview of the cosmological results derived from the first 15.5 months of observations of the ESA’s Planck mission. These cosmological results are mainly based on the Planck measurements of the cosmic ... -
Probing Gravitational Theories with Eccentric Eclipsing Detached Binary Stars
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)In this paper, we compare the effects of different theories of gravitation on the apsidal motion of eccentric eclipsing detached binary stars. The comparison is performed by using the formalism of the post-Newtonian ... -
Recent Results from the SAFIR Project
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)The "Seyfert and star formation Activity in the Far-Infrared" (SAFIR) project is aimed at studying the physical nature of the nuclear IR emission and star formation properties of a small sample of nearby Seyfert galaxies ... -
SiFAP: A New Fast Astronomical Photometer
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)A fast photometer based on SiPM technology was developed and tested at the University of Rome "La Sapienza" and at the Bologna Observatory. In this paper we present the improvements applied to our instrument, concerning ... -
Soft X-Ray Polarimeter: Potential Instrumentation and Observations
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)We present an instrument design capable of measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics. A set of multilayer-coated flats reflects the dispersed X-rays to the instrument ... -
Star Formation as Seen by Low Mass Stars
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Using the Hubble Space Telescope (HST) we have characterised and compared the physical properties of a large sample of pre-main sequence (PMS) stars spanning a wide range of masses (0:5 - 4Mʘ), metallicities (0:1 - 1 Zʘ) ... -
Star Formation in Tadpole Galaxies
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Tadpole Galaxies look like a star forming head with a tail structure to the side. They are also named cometaries. In a series of recent works we have discovered a number of issues that lead us to consider them extremely ... -
Testing f(R)-Theories by Binary Pulsars
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)Using the Post-Keplerian parameters to obtain, in the Minkowskian limit we obtain constraints on f(R)-theories of gravity from the first time derivative of the orbital period of a sample of binary stars. In the approximation ...