Results 31 to 40 of about 627 (186)
The Galactic kinematics of cataclysmic variables [PDF]
Astrophysics and Space Science, 2015 Kinematical properties of CVs were investigated according to population types and orbital periods, using the space velocities computed from recently updated systemic velocities, proper motions and parallaxes. Reliability of collected space velocity data are refined by removing 34 systems with largest space velocity errors.
Ak, T. +7 more
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The pre-cataclysmic variable, LTT 560 [PDF]
Astronomy & Astrophysics, 2007 System parameters of the object LTT560 are determined in order to clarify its nature and evolutionary status. We apply time-series photometry to reveal orbital modulations of the light curve, time-series spectroscopy to measure radial velocities of features from both the primary and the secondary star, and flux-calibrated spectroscopy to derive ...
Tappert, Claus +5 more
openaire +4 more sources
Rapid oscillations in cataclysmic variables [PDF]
Astrophysics and Space Science, 1986 I give an overview of the rich phenomenology of dwarf nova oscillations (DNOs) and Quasi-periodic Oscillations (QPOs) observed in cataclysmic variable stars (CVs). The favoured interpretation of these rapid brightness modulations (3 - >1000 s time scales) is that they are magnetic in nature - magnetically channelled accretion from the inner ...
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X-rays from cataclysmic variables [PDF]
, 2006 40 pages, 10 figures; minor updates to text. To appear in Compact Stellar X-Ray Sources, eds. W.H.G. Lewin and M.
Kuulkers, E. +3 more
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MAGNETIC CATACLYSMIC VARIABLES: 25 YEARS OF EXCITING PERFOMANCE
Odessa Astronomical Publications, 2017 Exactly 25 years ago, Santiago Tapia has detected circular and linear polarization of AM Her varying with the same period as the photometric and spectral characteristics. This had lead to a discovery of unprecedentedly exotic binary systems, in which the
I. L Andronov
doaj +1 more source
Ultraviolet observations of cataclysmic variables [PDF]
Advances in Space Research, 1987 AbstractThe preliminary results of the analysis of more than 1000 spectra of cataclysmic variables in the archive of the International Ultraviolet Explorer were presented at the meeting. To characterize the slope of the spectra I use F = log(f1460Å/f2880Å). For most spectra F lies between 0.2 and 0.7.
openaire +1 more source
THE WINDS OF CATACLYSMIC VARIABLES [PDF]
, 2018 19 pages, TeX format, 6 Postscript figures, uses mauche.mac and cwhstuff.tex. To appear in Cosmic Winds and the Heliosphere, ed. J. R. Jokipii, C. P. Sonett, & M. S. Giampapa (Tucson: Univ. of Arizona Press)
Mauche, C. W., Raymond, J. C.
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Brown dwarfs in retrogradely precessing cataclysmic variables?
EPJ Web of Conferences, 2011 We compare Smoothed Particle Hydrodynamic simulations of retrogradely precessing accretion disks that have a white dwarf primary and a main sequence secondary with observational data and with theory on retrograde precession via tidal torques like those ...
Martin E.L. +2 more
doaj +1 more source
The ethics of responding to democratic backsliding abroad
American Journal of Political Science, EarlyView.Abstract The past decade has seen a marked shift as many previously liberal democratic states have backslidden, taking authoritarian turns. How should liberal actors respond to democratic backsliding by others? Although it might seem that it is vital for liberal actors to react robustly to avoid complicity or to maintain their liberal integrity, this ...
James Pattison
wiley +1 more source
Cataclysmic variables: structure and evolution [PDF]
International Astronomical Union Colloquium, 1994 AbstractI discuss the structure and evolution of cataclysmic variables, with a particular emphasis on the influence of the physics used in calculating the internal structure of the secondary. The available observational data is very rich, and can, in principle, be used to constrain the stellar physics.
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