"MAGNETOSPHERIC GATE" IN POLARS
Section: STARS AND THE INTERSTELLAR MEDIUM
Authors:
1.
Pulkovo Observatory
Institute of Applied Astronomy of the Russian Academy of Sciences
Institute of Applied Astronomy of the Russian Academy of Sciences
2.
Pulkovo Observatory
3.
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo
Fesenkov Astrophysical Institute
Fesenkov Astrophysical Institute
4.
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo
Type:
Сonference article
Published:
27.12.2024
Subject area:
52
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
Language:
English
Keywords:
stars: cataclysmic variables, polars, magnetic fields; accretion; individual: AM Her, QQ Vul, AR UMa
Abstract (English):
The mass-exchange process in polars is discussed. We point out that the strong magnetic field of a white dwarf in these systems can under certain conditions prevent the material from flowing through the L1 point operating as a "magnetospheric gate''. We show that the condition under which the "magnetospheric gate'' is closed is satisfied in the majority of polars known to date. This finding opens the question about a possibility to realize an alternative mechanism of mass exchange in these systems. We briefly discuss application of this mechanism to the best studied polars.
The mass-exchange process in polars is discussed. We point out that the strong magnetic field of a white dwarf in these systems can under certain conditions prevent the material from flowing through the L1 point operating as a "magnetospheric gate''. We show that the condition under which the "magnetospheric gate'' is closed is satisfied in the majority of polars known to date. This finding opens the question about a possibility to realize an alternative mechanism of mass exchange in these systems. We briefly discuss application of this mechanism to the best studied polars.
Keywords:
stars: cataclysmic variables, polars, magnetic fields; accretion; individual: AM Her, QQ Vul, AR UMa
stars: cataclysmic variables, polars, magnetic fields; accretion; individual: AM Her, QQ Vul, AR UMa
1. Cropper M., 1990, Space Science Review, 54, p. 195
2. Ikhsanov N., Kim V., Korol'kova O., 2023, Publications of the Pulkovo Observatory, 228, p. 118
3. Ikhsanov N.R. and Pustil'nik L.A., 1996, Astronomy & Astrophysics, 312, p. 338
4. Mukai K., 1988, Monthly Notices of the Royal Astronomical Society, 232, p. 175
5. Norton A.J., Wynn G.A., Somerscales R.V., 2004, Astrophysical Journal, 614, 1, p. 349
6. Plavec M. and Kratochvil P., 1964, Bulletin of the Astronomical Institutes of Czechoslovakia, 15, p. 165
7. Schneider D.P. and Young P., 1980, Astrophysical Journal, 240, p. 871
