The time-dependent collapse of a radiatively cooling corona

Statistics – Computation

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Gravitational Collapse, Radiant Cooling, Stellar Coronas, Stellar Mass Accretion, Time Dependence, White Dwarf Stars, Computational Astrophysics, Emission Spectra, Lagrange Coordinates, Stellar Luminosity, Stellar Temperature, X Ray Spectra

Scientific paper

The Lagrangian equations describing the quasi-hydrostatic collapse of a radiatively cooling atmosphere are solved. It is shown that the instantaneous radiation spectrum at any time is given by an explicit integral over the initial configuration, and that the observed luminosity (L) and spectral temperature (T) can both correlate or anticorrelate - and the soft and hard parts of the spectrum vary together or lag - depending on the precise initial conditions. These results are applied to the case of coronae around accreting white dwarfs. A correlation L proportional to T squared is observed in the X-ray emission from SS Cygni. Since there is no particular reason to suppose that the required initial conditions are fulfilled here, an alternative explanation is suggested, based on the fact that the integration time of the X-ray observations is comparable to the coronal cooling time.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The time-dependent collapse of a radiatively cooling corona 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 The time-dependent collapse of a radiatively cooling corona, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The time-dependent collapse of a radiatively cooling corona will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1296485

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.