A dynamical explanation for a long-term modulation in the light curve of FS Aurigae A possible triple cataclysmic variable system
Por:
Chavez C.E., Tovmassian G., Aguilar L.A., Zharikov S., Henden A.A.
Publicada:
1 feb 2012
Resumen:
Aims. FS Aur is an unusual cataclysmic variable, which in addition to its spectroscopically determined orbital period of 85.7 min exhibits spectroscopic and photometric periods of 147 and 205 min, correspondingly, which are attributed to the period of the fast rotating and freely precessing magnetic white dwarf. We aim to study the origin of a very long term variability observed in the light curve of FS Aur accumulated by us and in the AAVSO International Database over the past thirteen years. Methods. Discrete Fourier transform algorithm and Scargle-Lomb least-squares spectral analysis were used for the period analysis of the observational data. A 12th-order Runge-Kutta-Nystrm integrator was used to conduct numerical simulations of a three-body system that is invoked to explain the observed long-term variability in the FS Aur light curve, which is probably periodic. Results. We report here a newly discovered similar to 2-mag modulation of the light curve of FS Aur with a similar to 90
Filiaciones:
Chavez C.E.:
Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, Mexico
Tovmassian G.:
Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, Mexico
Aguilar L.A.:
Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, Mexico
Zharikov S.:
Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, Mexico
Henden A.A.:
AAVSO Headquarters, 49 Bay State Rd., Cambridge, MA 02138, United States
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