The Formula line polarization in magnetic white dwarfs
نویسندگان
چکیده
منابع مشابه
Magnetic Accretion Onto White Dwarfs
The influence of the magnetic field on process of the accretion onto White Dwarfs in Cataclysmic Variables (CVs) is discussed. Except for the Polars or AM Her objects, the strength of magnetic field can not be measured directly in CVs by modern techniques. But there is growing evidence that most of the types of Cataclysmic Variables classified on the basis of their observational characteristics...
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Recent developments in the accretion onto magnetic white dwarfs are reviewed. Accreting magnetic white dwarfs display many of the characteristics of accreting systems of a galactic scale, with the advantage that in these systems the accreting material is collimated into a relatively well-determined 1-dimensional ow.
متن کاملProgress in Modeling Magnetic White Dwarfs
The analysis of magnetic white dwarfs has made considerable progress since the last white dwarf workshop: 1. It could be shown that neither the magnetic white dwarf Grw +70◦8247 (Jordan & Friedrich, 2001) nor LP 790−29 (Jordan & Friedrich 2002, Beuermann et al. 2002) are fast rotators (P < 10 min) but are rotating slowly (P > 20 years). 2. Automatic fitting procedures have been developed which ...
متن کاملMagnetic Field Evolution in Accreting White Dwarfs
We discuss the evolution of the magnetic field of an accreting white dwarf. We calculate the ohmic decay modes for accreting white dwarfs, whose interiors are maintained in a liquid state by compressional heating. We show that the lowest order ohmic decay time is (8–12) billion years for a dipole field, and (4–6) billion years for a quadrupole field. We then compare the timescales for ohmic dif...
متن کاملPolarization variability in magnetic white dwarfs GD 229 and G 240 - 72
GD 229 and G 240-72 belong to the group of strongly polarized magnetic (B ≥ 108) white dwarfs which do not show apparent polarization variability. New polarimetric observations obtained in November 1996 and 1997 at the Nordic Optical Telescope clearly confirmed a previously reported detection of long-term variations in polarization of GD 229 and have given for the first time an evidence of simi...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1995
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/272.1.24