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

Zobrazují se záznamy 32-51 z 65

    • Photometric and Spectroscopic Investigation of the Dwarf Nova HS 0218+3229: A Short Review 

      Autor: Katysheva, N.; Shugarov, S.; Borisov, N.; Gabdeev, M.; Golysheva, P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper is devoted to the study of the cataclysmic variable HS 0218+3229 using the photometric and spectroscopic observations.

    • Photometry and Multipolar Magnetic Field Modeling of Polars: BY Camelopardalis and FL Ceti 

      Autor: Mason, P. A.; Zhilkin, A. G.; Bisikalo, D. V.; Gomez, S.; Morales, J.; Robinson, E. L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We present new broad band optical photometry of two magnetic cataclysmic variable stars, the asynchronous polar BY Camelopardalis and the short period polar FL Ceti. Observations were obtained at the 2.1-m Otto Struve ...

    • Probing the Accretion Processes in Soft X-Ray Selected Polars 

      Autor: Traulsen, I.; Reinsch, K.; Schwope, A. D.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      High-energy data of accreting white dwarfs give access to the regime of the primary accretion-induced energy release and the different proposed accretion scenarios. We perform XMM-Newton observations of polars selected due ...

    • Properties of Recurrent Nova T Pyxidis Based on 2011 Outburst 

      Autor: Tanabe, K.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We reexamine the properties of the recurrent nova T Pyxidis based on our own spectroscopic data accompanying with the photometric ones by VSOLJ (Variable Star Observers League in Japan) during 2011 outburst. One of the ...

    • 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 ...