Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-09
Mon.Not.Roy.Astron.Soc.379:779-790,2007
Astronomy and Astrophysics
Astrophysics
MNRAS accepted; 13 pages, 10 figures, 2 tables
Scientific paper
10.1111/j.1365-2966.2007.11958.x
We investigate the hydrodynamics of accretion channelled by a dipolar magnetic field (funnel flows). We consider situations in which the electrons and ions in the flow cannot maintain thermal equilibrium (two-temperature effects) due to strong radiative loss, and determine the effects on the keV X-ray properties of the systems. We apply this model to investigate the accretion shocks of white dwarfs in magnetic cataclysmic variables. We have found that the incorporation of two-temperature effects could harden the keV X-rays. Also, the dipolar model yields harder X-ray spectra than the standard planar model if white dwarf is sufficiently massive (>~1M_sun). When fitting observed keV X-ray spectra of magnetic cataclysmic variables, the inclusion of two-temperature hydrodynamics and a dipolar accretion geometry lowers estimates for white-dwarf masses when compared with masses inferred from models excluding these effects. We find mass reductions <~9% in the most massive cases.
Canalle Joao. B. G.
Cropper Mark
Ramsay Gavin
Saxton Curtis J.
Wu Kinwah
No associations
LandOfFree
X-ray emissions from two-temperature accretion flows within a dipole magnetic funnel does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with X-ray emissions from two-temperature accretion flows within a dipole magnetic funnel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray emissions from two-temperature accretion flows within a dipole magnetic funnel will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-646246