Energy-dependent variability from accretion flows

Details Energy-dependent variability from accretion flows Energy-dependent variability from accretion flows

2005-04-12

arxiv.org/abs/astro-ph/0504261v1

Mon.Not.Roy.Astron.Soc. 360 (2005) 801-815

Astronomy and Astrophysics

Astrophysics

MNRAS, in press, 9 pages

Scientific paper

10.1111/j.1365-2966.2005.09113.x

We develop a formalism to calculate energy-dependent fractional variability (rms) in accretion flows. We consider rms spectra resulting from radial dependencies of the level of local variability (as expected from propagation of disturbances in accretion flows) assuming the constant shape of the spectrum emitted at a given radius. We consider the cases when the variability of the flow is either coherent or incoherent between different radial zones. As example local emission, we consider blackbody, Wien and thermal Comptonization spectra. In addition to numerical results, we present a number of analytical formulae for the resulting rms. We also find an analytical formula for the disc Wien spectrum, which we find to be a very good approximation to the disc blackbody. We compare our results to the rms spectrum observed in an ultrasoft state of GRS 1915+105.

Affiliated with

Also associated with

No associations

Rating

Energy-dependent variability from accretion flows 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 Energy-dependent variability from accretion flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy-dependent variability from accretion flows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-350638