Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004kas..confe..48p&link_type=abstract
Presented at the KITP: Astrophysics Seminars, Jan 22, 2004, Kavli Institute for Theoretical Physics, University of California, S
Astronomy and Astrophysics
Astrophysics
Scientific paper
If an accretion disk remains thin near the point where it reaches the whitedwarf surface, accreted material will first reach the stellar surface at theequator. This material must slow its orbit as it comes into co-rotation withthe white dwarf, dissipating kinetic energy into thermal energy and creatinga hot band of freshly accreted material around the equator. I will present aset of solutions which describe the properties of this hot belt (based on thework by Inogamov & Sunyaev 1999 for accreting neutron stars). I find that atlow accretion rates the amount of spreading is negligible and most of thedissipated energy is radiated back into the accretion disk. When the accretionrate is high, such as in a dwarf nova outburst or symbiotic binary, thematerial may spread high enough to be seen above the accretion disk.This study opens up a new area of investigation for accreting systems,including being a new source for spectral modeling and nonradial oscillations.
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