X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni

Details X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni

2000-08-01

arxiv.org/abs/astro-ph/0008035v2

Astronomy and Astrophysics

Astrophysics

16 pages, 3 figures, accepted for publication in ApJ

Scientific paper

10.1086/319074

Rather than accreting via a disk, some White Dwarfs (WDs) in quiescent Dwarf Novae (DN) could accrete via an Advection-Dominated Accretion Flow (ADAF) possibly responsible for the X-ray Bremsstrahlung emission observed. Such a hot accretion flow is also expected to produce characteristic thermal line emission. Using SS Cyg as a specific example, we show that knowing a priori the inclination and the WD mass in quiescent DN makes X-ray line diagnostics powerful probes of the flow structure in these systems. Current X-ray instruments can discriminate, from their width, between lines emitted from a flow with a Keplerian rotation rate and those emitted at a substantially sub-Keplerian rate. This could be used to observationally test the property of energy advection, which is at the origin of the partial radial pressure support by the hot gas and the sub-Keplerian rotation rate in an ADAF.

Affiliated with

Also associated with

No associations

Rating

X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni 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 X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-402582