Results 41 to 50 of about 17,748 (203)
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
Cataclysmic Variables in the SUPERBLINK Proper Motion Survey [PDF]
, 2014 We have discovered a new high proper motion cataclysmic variable (CV) in the SUPERBLINK proper motion survey, which is sensitive to stars with proper motions greater than 40 mas/yr.
Lépine, Sébastien +2 more
core +3 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 ...
openaire +3 more sources
SW Sex Stars Then and Now: A Review [PDF]
, 2017 SW Sextantis stars are a class of cataclysmic variables originally defined via certain peculiar properties that they all have in common. In this article, I review our knowledge of these stars and show the way from a phenomenological classification to a ...
Schmidtobreick, Linda
core +1 more source
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.
openaire +2 more sources
Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables [PDF]
, 2014 We present photometry of 11 and spectroscopy of 35 potential cataclysmic variables from the Sloan Digital Sky Survey, the Catalina Real-Time Transient Survey and vsnet-alerts.
Bond, Howard E. +6 more
core +3 more sources
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