Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.6302s&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #63.02; Bulletin of the American Astronomical Society, Vol. 30, p.911
Astronomy and Astrophysics
Astronomy
1
Scientific paper
As cataclysmic variables (CVs) are composed of white dwarfs accreting material that has been transferred from late main sequence stars, they provide ideal laboratories for the study of hot plasma in high gravity and high field regimes. Because the accretion can occur via an accretion disk (for low magnetic field white dwarfs), or through an accretion column (in the high field cases), there are many parameter regimes of temperature to explore. The underlying white dwarf can have a range of temperature from 9000-60,000K, while the heating that occurs from the accretion can bring the temperature in spots or belts up to 100,000K. In addition, the transfer of the material from the secondary can alter the composition at the surface of the white dwarf. The FUV from 900-1200 Angstroms offers special insight both to the temperature distribution of the inner disk and the white dwarf and the abundances of the accreted material. The wide range of available line transitions encompass NII and SIII at temperatures of tens of thousands to OVI and SVI at 300,000K. The observed continuum distribution in this area provides a critical test of various models proposed for the accretion disk and even whether the inner disk exists or is dissipated by coronal syphons or magnetic fields. Lastly, high resolution observations enable velocities to be determined, which provide insights into the rotation rates of the white dwarf as well as the velocity flows of material onto the white dwarf.
No associations
LandOfFree
Cataclysmic Variables: FUV Insights on Accretion Disks and Accreting White Dwarfs 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 Cataclysmic Variables: FUV Insights on Accretion Disks and Accreting White Dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cataclysmic Variables: FUV Insights on Accretion Disks and Accreting White Dwarfs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1365058