Prohlížení Acta Polytechnica CTU Proceedings. 2015, vol.2, no. 1 dle názvu

Zobrazují se záznamy 44-63 z 65

    • Supersoft X-Ray Source CAL 83: A Possible AE Aqr-like System 

      Autor: Odendaal, A.; Meintjes, P. J.; Charles, P. A.; Rajoelimanana, A. F.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      CAL83 is a close binary supersoft X-ray source in the Large Magellanic Cloud. A ~67 s periodicity detected in supersoft X-rays is most probably associated with the spin period of a highly spun-up white dwarf (WD). The ...

    • Suzaku View of Magnetic Cataclysmic Variables 

      Autor: Yuasa, T.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Results of magnetic cataclysmic variable studies performed with the Suzaku satellite are reviewed in this article. Particular emphasis is placed on the recent update of X-ray spectral model of intermediate polars, possible ...

    • SWSex Stars, Old Novae, and the Evolution of Cataclysmic Variables 

      Autor: Schmidtobreick, L.; Tappert, C.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The population of cataclysmic variables with orbital periods right above the period gap are dominated by systems with extremely high mass transfer rates, the so-called SW Sextantis stars. On the other hand, some old novae ...

    • The Golden Age of Cataclysmic Variables and Related Objects (Old and News) 

      Autor: Giovannelli, F.; Sabau-Graziati, L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this paper we review cataclysmic variables (CVs) discussing several hot points about the renewing interest of today astrophysics about these sources. We will briefly discuss also about classical and recurrent novae, as ...

    • The Golden Age of Cataclysmic Variables and Related Objects - II Concluding Address 

      Autor: Giovannelli, F.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Before to conclude officially this workshop — far from me the idea to attempt some concluding remarks already dealt at the meeting with various burning by Joseph Patterson, Mariko Kato, Dmitry Bisikalo, and Rene Hudec —, ...

    • The Hidden Population of AM CVn Binaries in the Sloan Digital Sky Survey 

      Autor: Carter, P. J.; Marsh, T. R.; Steeghs, D.; Breedt, E.; Copperwheat, C. M.; Gansicke, B. T.; Groot, P. J.; Nelemans, G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We present results from a spectroscopic survey designed to uncover AM Canum Venaticorum (AM CVn) binaries hidden in the photometric database of the Sloan Digital Sky Survey (SDSS). The discovery of only 7 new AM CVns in ...

    • The Nova V5584 Sgr: A Short Review 

      Autor: Poggiani, R.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The nova V5584 Sgr was discovered during 2009 October. It has been monitored in different domains of the electromagnetic spectrum: optical, infrared and X-rays. The optical and infrared observations suggest that V5584 Sgr ...

    • The Recurrent Eclipsing Nova U Sco: A Short Review 

      Autor: González-Riestra, R.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      U Scorpii is the recurrent nova with the shortest inter-outburst period, only ten years. The last active phase took place at the beginning of 2010, and it provided a large amount of data from both ground-based and space ...

    • The Ritter-Kolb Catalogue and its Impact on Research into CVs, LMXBs and related Objects 

      Autor: Ritter, H.; Kolb, U.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In the first part of this paper, the Ritter-Kolb catalogue (RKcat for short), its history and a few examples of its application to research in the field of cataclysmic variables are briefly described. In a second part we ...

    • The Role of Magnetic Field for Quiescence-Outburst Models in CVs 

      Autor: De Bianchi, S.; Braga, V. F.; Gaudenzi, S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this paper we present the elementary assumptions of our research on the role of the magnetic field in modelling the quiescence-outbursts cycle in Cataclysmic Variables (CVs). The behaviour of the magnetic field is crucial ...

    • The Slow Nova V1280 Sco: A Short Review 

      Autor: Naito, H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We summarize the results of the extremely slow nova V1280 Sco and discuss the approach using discrete multiple blueshifted absorption lines, such as metastable He i* and Na i D, detected in our high-resolution spectra.

    • The Space Density of Magnetic and Non-magnetic Cataclysmic Variables, and Implications for CV Evolution 

      Autor: Pretorius, M. L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We present constraints on the space densities of non-magnetic and magnetic cataclysmic variables, and discuss some implications for models of the evolution of CVs. The high predicted non-magnetic CV space density is only ...

    • The UBV Color Evolution of Classical and Symbiotic Novae 

      Autor: Hachisu, I.; Kato, M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We identified a general course of classical nova outbursts in the B − V vs. U − B diagram. It has been reported that novae show spectra similar to A–F supergiants near optical light maximum. However, they do not follow the ...

    • Theory of Nova Outbursts and Type Ia Supernovae 

      Autor: Kato, M.; Hachisu, I.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We briefly review the current theoretical understanding of the light curves of novae. These curves exhibit a homologous nature, dubbed the universal decline law, and when time-normalized, they almost follow a single curve ...

    • Transient Processes in a Binary System with a White Dwarf 

      Autor: Kononov, D. A.; Bisikalo, D. V.; Puzin, V. B.; Zhilkin, A. G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Using the results of 3D gas dynamic numerical simulations we propose a mechanism that can explain the quiescent multihumped shape of light curves of WZ Sge short-period cataclysmic variable stars. Analysis of the obtained ...

    • What Powers the 2006 Outburst of the Symbiotic Star BF Cygni? 

      Autor: Skopal, A.; Sekeráš, M.; Tomov, N. A.; Tomova, M. T.; Tarasova, T. N.; Wolf, M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      BF Cygni is a classical symbiotic binary. Its optical light curve occasionally shows outbursts of the Z And-type, whose nature is not well understood. During the 2006 August, BF Cyg underwent the recent outburst, and ...

    • When a Nova Becomes Old 

      Autor: Ederoclite, A.; Tappert, C.; Schmidtobreick, L.; Vogt, N.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Here we present the preliminary results of a project aimed at unveiling the nature of classical novae decades after their eruption. The ultimate goal of this project is to describe the population of cataclysmic variables ...

    • White Dwarfs in Cataclysmic Variables: An Update 

      Autor: Sion, E. M.; Godon, P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this review, we summarize what is currently known about the surface temperatures of accreting white dwarfs in nonmagnetic and magnetic cataclysmic variables (CVs) based upon synthetic spectral analyses of far ultraviolet ...

    • Who Discovered the Hoyle Level? 

      Autor: Shaviv, G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The prediction of Hoyle that the nucleus of 12C must have a resonance at 7.62MeV was the trigger to the Anthropic Principle. We review the history of the discovery of this level and investigate to what extent this was a ...

    • Why a New Code for Novae Evolution and Mass Transfer in Binaries? 

      Autor: Shaviv, G.; Idan, I.; Shaviv, N. J.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      One of the most interesting problems in Cataclysmic Variables is the long time scale evolution. This problem appears in long time evolution, which is also very important in the search for the progenitor of SN Ia. The ...