Prohlížení Acta Polytechnica CTU Proceedings. 2014, vol. 1, no. 1 dle názvu

Zobrazují se záznamy 42-61 z 62

    • Old and New from Multifrequency Astrophysics 

      Autor: Giovannelli, Franco; Sabau-Graziati, Lola
      (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 

      Autor: Ebisawa, Ken; Iso, Naoki; Miyakawa, Takehiro; Inoue, Hajime
      (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 

      Autor: Colafrancesco, Sergio
      (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 

      Autor: Rubino-Martín, José Alberto
      (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 

      Autor: Milano, Leopoldo; De Rosa, Rosario; De Laurentis, Mariafelicia; Garufi, Fabio
      (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 

      Autor: Sánchez-Portal, M.; Castillo-Fraile, M.; Almeida, C. Ramos; Esquej, P.; Alonso-Herrero, A.; Pérez García, A. M.; Acosta-Pulido, J.; Altieri, B.; Bongiovanni, A.; Castro Céron, J. M.; Cepa, J.; Coia, D.; Conversi, L.; Fritz, J.; Gonzalez-Serrano, J. I.; Hatziminaoglou, E.; Povic, M.; Rodrguez Espinosa, J. M.; Valtchanov, I.
      (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 

      Autor: Ambrosino, Filippo; Meddi, Franco; Nesci, Roberto; Rossi, Corinne; Sclavi, Silvia; Bruni, Ivan
      (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 

      Autor: Marshall, Herman L.; Schulz, Norbert S.
      (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 

      Autor: Panagia, Nino; De Marchi, Guido
      (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 

      Autor: Muñoz-Tuñon, Casiana; Almeida, Jorge Sanchez; Elmegreen, Debra M.; Elmegreen, Bruce G.
      (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 

      Autor: De Laurentis, Mariafelicia; De Martino, Ivan
      (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 ...

    • The Formation of Massive Stars: from Herschel to Near-Infrared 

      Autor: Persi, Paolo; Tapia, Mauricio
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We have studied a number of selected high mass star forming regions, including high resolution near-infrared broad- and narrow-band imaging, Herschel (70, 160, 250, 350 and 500 μm) and Spitzer (3.6, 4.5, 5.8 and 8.0 m) ...

    • The Galactic Center Region Imaged by VERITAS from 2010{2012 

      Autor: Beilicke, Matthias
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The galactic center has long been a region of interest for high-energy and very-high-energy observations. Many potential sources of GeV/TeV gamma-ray emission are located in this region, e.g. the accretion of matter onto ...

    • The HiSCORE Project 

      Autor: Tluczykont, M.; Brückner, M.; Budnev, N.; Chvalaev, O.; Dyachok, A.; Epimakhov, S.; Gress, O.; Hampf, D.; Horns, D.; Ivanova, A.; Kalmykov, N.; Konstantinov, E.; Korosteleva, E.; Kozin, V.; Kunnas, M.; Kuzmichev, L.; Lubsandorzhiev, B.; Mirgazov, R.; Monkhoev, R.; Nachtigall, R.; Panasyuk, M.; Pakhorukov, A.; Poleschuk, V.; Porelli, A.; Prosin, V.; Ptuskin, V.; Rubtsov, G. I.; Satunin, P. S.; Semeney, Yu.; Spitschan, D.; Skukhin, A.; Sveshnikova, L.; Wischnewski, R.; Zagorodnikov, A.; Zirakashvili, V.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      A central question of Astroparticle Physics, the origin of cosmic rays, still remains unsolved. HiSCORE (Hundred*i Square-km Cosmic ORigin Explorer) is a concept for a large-area wide-angle non-imaging air shower detector, ...

    • The Tenth International Workshop on MULTIFREQUENCY BEHAVIOUR OF HIGH ENERGY COSMIC SOURCES Palermo, Italy, 2013 

      Autor: Foreword, Editorial,
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Organizing Institutions:Istituto di Astrofisica e Planetologia Spaziali IAPS-INAF, Roma, ItalyDpt de Cargas Utiles y Ciencias del Espacio, DCUCE-INTA Madrid, SpainE.O. Hulburt Center for Space Research, HCA-NRL, Washington ...

    • The World Space Observatory - Ultraviolet (WSO-UV) Space Telescope; Status Update in 2013 

      Autor: Gómez de Castro, Ana I.; Shustov, Boris; Sachkov, Mikhail
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This is a short primer and a brief update on the status of the World Space Observatory-Ultraviolet (WSO-UV) project dated in May 2013. WSO-UV is a 170m primary space telescope equipped for ultraviolet imaging and spectroscopy ...

    • The X-Ray Binary KS 1731{260: Possible Analogy with Her X-1 

      Autor: Šimon, Vojtěch
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The X-ray binary with the neutron star (NS), KS 1731-260, displays superorbital cycle similar to that in Her X-1. The accretion disk had the memory of the cycle-length even when this modulation sometimes disappeared in the ...

    • Unveiling the Nature of INTEGRAL Objects: a Review 

      Autor: Parisi, Pietro
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Since its launch in October 2002, the INTEGRAL observatory has improved our knowledge of the hard X-ray sky above 20 keV, carrying out more than ten years of observations in the energy range from 5 keV to 8 MeV. The most ...

    • US Astronomical Photographic Data Archives: Hidden Treasures and Importance for High-Energy Astrophysics 

      Autor: Hudec, René; Hudec, Lukáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We report here on an ongoing investigation of US astronomical plate archives and tests of the suitability of transportable scanning devices for in situ digitization of archival astronomical plates, with emphasis on application ...

    • V2282 Sgr Revisited 

      Autor: Nesci, Roberto; Rossi, Corinne; Frasca, Antonio; Marilli, Ettore; Persi, Paolo; Cornero, Nicola
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The nature of V2282 Sgr is examined on the basis of several multiband observations: a 20 years long I-band light curve of V2282 Sgr obtained from archive photographic plates of the Asiago and Catania Observatories; a CCD ...