First View of the Accretion Disks in Normal Symbiotic Stars
Abstract
Accretion disks in symbiotic stars are often hidden by the optical emission from the red-giant companion, UV from the ionized nebula, and soft X-rays from colliding winds. A survey of symbiotic with Swift, however, has revealed that the accretion disk dominates above 2 keV and in the rapidly variable portion of the UV. To determine the basic properties of the large, wind- fed accretion disks around the white dwarfs in symbiotic, we propose X-ray and UV observations with XMM-Newton of the two most promising targets from our Swift survey. Only XMM can provide the sensitive, contiguous, multi-wavelength observations to determine the accretion rates, characterize the properties of the UV flickering and test our conclusion that hard X-rays originate in the innermost accretion disk.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2013
- Bibcode:
- 2013xmm..prop...18S
- Keywords:
-
- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- NQ Gem;
- V1261 Ori