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

Zobrazují se záznamy 36-55 z 65

    • Recurrent Novae — A Review 

      Autor: Mukai, K.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In recent years, recurrent nova eruptions are often observed very intensely in wide range of wavelengths from radio to optical to X-rays. Here I present selected highlights from recent multi-wavelength observations. The ...

    • Rotation of the Mass Donors in High-mass X-ray Binaries and Symbiotic Stars 

      Autor: Stoyanov, K.; Zamanov, R.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Our aim is to investigate the tidal interaction in High-mass X-ray Binaries and Symbiotic stars in order to determine in which objects the rotation of the mass donors is synchronized or pseudosynchronized with the orbital ...

    • Simultaneous UBVRI Observations of the AE Aquarii Blobs 

      Autor: Latev, G.; Zamanov, R.; Boeva, S.; Stoyanov, K.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We summarize the results of our study of the cataclysmic variable AE Aqr on the basis of simultaneous UBV RI observations. For the flares, we estimated the average risetime of about 300 sec, and colours (U−B)0~1.1 and (B−V ...

    • Spectroscopic Monitoring Observations of Nova V1724 Aql in 2012 

      Autor: Kajikawa, T.; Nagashima, M.; Kawakita, H.; Arai, A.; Ikeda, Y.; Isogai, M.; Fujii, M.; Ayani, K.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Spectroscopic and photometric monitoring observations of nova Apl 2012 (V1724 Apl) were conducted at Koyama Astronomical Observatory, Fujii-Kurosaki Observatory and Bisei Astronomical Observatory. The nova was initially ...

    • SS Cygni Revisited 

      Autor: Smith, R. C.; Echevarrıa, J.; Hernandez, J. V.; Szkody, P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      New spectroscopic and photometric observations of SS Cygni, the brightest dwarf nova system, have been obtained, with the aim of mapping starspots on the surface of the secondary star. Four nights of echelle spectroscopy ...

    • Study of Cataclysmic Variables with the Satellites LOFT and Gaia 

      Autor: Hudec, R.; Šimon, V.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The goal of this paper is to discuss the capabilities of ESA satellite missions Gaia (already in space) and LOFT (considered for the ESA M4 slot) for investigation of cataclysmic variables (CVs). Both Gaia and LOFT can ...

    • Study of Photometric Variability of Selected SU UMa Dwarf Novae 

      Autor: Voloshina, I.; Metlov, V.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this work we present time-resolved photometry of several poorly-studied dwarf novae during recent superoutbursts. Observations were made with a CCD, mounted on 50- and 60-cm telescopes of the Sternberg Astronomical ...

    • Superoutburst of a New Sub-Period-Minimum Dwarf Nova CSS130418 in Hercules 

      Autor: Chochol, D.; Shugarov, S.; Katysheva, N.; Volkov, I.; Zharova, A.; Pavlenko, E.; Pit, N.; Zvagelsky, R.; Antoniuk, O.; Baklanov, A.; Borisov, N.; Gabdeev, M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Multicolour photometry of a new dwarf nova CSS130418 in Hercules, which underwent superoutburst on April 18, 2013, allow to classified it as a WZ Sge-type dwarf nova. The phase light curves for different stages of superoutburst ...

    • 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 ...