Infrared spectroscopy of cataclysmic variables -- III. Dwarf novae below the period gap and nova-like variables
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چکیده
منابع مشابه
Dwarf nova oscillations and quasi - periodic oscillations in cataclysmic variables - VII . OY Carinae and oscillations in dwarf novae in quiescence
We have observed dwarf nova oscillations (DNOs) in OY Car during outburst, down through decline and beyond; its behaviour is similar to what we have previously seen in VW Hyi, making it only the second dwarf nova to have DNOs late in outburst that continue well into quiescence. There are also occasional examples of DNOs in deep quiescence, well away from outburst – they have properties similar ...
متن کاملDwarf nova oscillations and quasi - periodic oscillations in cataclysmic variables - VIII . OY Carinae and oscillations in dwarf novae in quiescence
We have observed dwarf nova oscillations (DNOs) in OY Car during outburst, down through decline and beyond; its behaviour is similar to what we have previously seen in VW Hyi, making it only the second dwarf nova to have DNOs late in outburst that continue well into quiescence. There are also occasional examples of DNOs in deep quiescence, well away from outburst – they have properties similar ...
متن کاملThe Nova-like Variables
We review optical observations and theoretical models of the non-magnetic nova-like variables (UX UMa, VY Scl and SW Sex stars). A brief discussion of the classiication scheme is followed by a statistical overview of the observed properties. The most important features of each of the sub-classes are then reviewed, concluding with a summary of the theoretical models invoked to understand these s...
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We present VTL/ISAAC infrared spectroscopy of a sample of short orbital period cataclysmic variables which are candidates for harboring substellar companions. We have detected the K i and Na i absorption lines of the companion star in VY Aqr. The overall spectral distribution in this system is best fit with a M9.5 type dwarf spectra, implying a distance of 100 ± 10 pc. VY Aqr seems to fall far ...
متن کاملInfrared Spectroscopy of Cataclysmic Variables -ii. Intermediate Polars
We present infrared (0.97{2.45 micron) spectra of the intermediate polars PQ Gem (RE0751+14), BG CMi and EX Hya. The spectra show strong Paschen, Brackett and He I emission lines from the accretion disc/stream. The infrared continua of PQ Gem and BG CMi can be represented by blackbodies of temperatures 4500 K and 5100 K, respectively, or by power-laws of the form f / 0:6;0:9 , respectively, and...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2000
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2000.03427.x