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69 papers
Fast quasi-periodic oscillations in the eclipsing polar VV Puppis from VLT and XMM-Newton observations
J. M. Bonnet-Bidaud, M. Mouchet, E. Falize +7
We present high time resolution optical photometric data of the polar VV Puppis obtained simultaneously in three filters (u', HeII 4686, r') with the ULTRACAM camera mounted at…
Laboratory radiative accretion shocks on GEKKO XII laser facility for POLAR project
L. Van Box Som, E. Falize, M. Koenig +20
A new target design is presented to model high-energy radiative accretion shocks in polars. In this paper, we present the experimental results obtained on the GEKKO XII laser facil…
Numerical simulations of high-energy flows in accreting magnetic white dwarfs
Lucile Van Box Som, Emeric Falize, Jean-Marc Bonnet-Bidaud +3
Some polars show quasi-periodic oscillations (QPO) in their optical light curves which have been interpreted as the result of shock oscillations driven by the cooling instability.…
A VLT-ULTRACAM study of the fast optical quasi-periodic oscillations in the polar V834 Centauri
M. Mouchet, J. -M. Bonnet-Bidaud, L. Van Box Som +6
Quasi-periodic oscillations (QPOs) of a few seconds have been detected in some Polars, the synchronised subclass of cataclysmic systems containing a strongly magnetised white dwarf…
The thermal instability of the warm absorber in NGC 3783
R. W. Goosmann, T. Holczer, M. Mouchet +5
We model the observed X-ray spectral continuum shape, ionic column densities, and absorption measure distribution (AMD) of the warm absorber in the Seyfert galaxy NGC 3783. We assu…
Quasi-periodic oscillations in accreting magnetic white dwarfs I. Observational constraints in X-ray and optical
J. M. Bonnet-Bidaud, M. Mouchet, C. Busschaert +2
Quasi-periodic oscillations (QPOs) are observed in the optical flux of some polars with typical periods of 1 to 3 s but none have been observed yet in X-rays where a significant pa…