Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star

Details Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..784..685b&link_type=abstract

MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings, Volume 784, pp

Other

Cataclysmic Binary Stars, White Dwarfs, Magnetic Fields, Accretion, Accretion Disks, Stellar Evolution, Novae, Dwarf Novae, Recurrent Novae, And Other Cataclysmic Variables, Cataclysmic Binaries, Symbiotic Stars, Eclipsing Binaries, Stellar Activity

Scientific paper

Cataclymic variables (CVs) are semi-detached binary systems in which a main sequence late-type star (the secondary) fills its Roche lobe and transfers matter to a white dwarf (the primary) through the inner Lagragian point L1. Evolutive models of CVs predicts that the orbital periods Porb of these systems would decrease on time scales of 108 - 109 years due to angular momentum losses either by magnetic braking via the secondary star's wind (Porb > 3 hr) or by emission of gravitational radiation (Porb > 3 hr). These models try to explain the observed gap of systems with Porb in the range of ~ 2 to 3 hr as the consequence of a sharp reduction of magnetic field open lines when the secondary star become fully convective (at Porb ~ 3 hr). However, up to now no well-studied CVs show evidence of period decrease. Instead, most well-observed eclipsing CVs show cyclical period changes probably associated to solar-type (quasi-periodic and/or multiperiodic) magnetic activity cycles in the secondary star. The fast spinning secondaries of CVs, covering a range of masses and rotation periods, are an important laboratory to understand magnetic activities cycles in late type stars. In the present work, we report the investigation of cyclical period changes in IP Peg: CV with orbital periods of 3.8 hr.

Affiliated with

Also associated with

No associations

Rating

Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star 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 Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cyclical period changes in cataclysmic variables: evidence of magnetic activity cycles in the mass-donor star will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1300664