What can we learn from Accretion Disc Eclipse Mapping experiments?
نویسنده
چکیده
The accretion disc eclipse mapping method is an astrotomographic inversion technique that makes use of the information contained in eclipse light curves to probe the structure, the spectrum and the time evolution of accretion discs in cataclysmic variables. This paper presents examples of eclipse mapping results that have been key to improve our understanding of accretion physics.
منابع مشابه
Eclipse mapping of accretion discs
The eclipse mapping method is an inversion technique that makes use of the information contained in eclipse light curves to probe the structure, the spectrum and the time evolution of accretion discs. In this review I present the basics of the method and discuss its different implementations. I summarize the most important results obtained to date and discuss how they have helped to improve our...
متن کاملAccretion Disc Evolution in DW Ursae Majoris: A Photometric Study
We present an analysis of CCD photometric observations of the eclipsing novalike cataclysmic variable DW UMa obtained in two different luminosity states: high and intermediate. The star presents eclipses with very different depth: ∼ 1.2 mag in the high and ∼ 3.4 mag in the intermediate state. Eclipse mapping reveals that this difference is almost entirely due to the changes in the accretion dis...
متن کاملTime - resolved flickering mapping of V 2051 Ophiuchi
Although flickering is one of the fundamental signatures of accretion, it is also the most poorly understood aspect of the accretion processes. A promising step towards a better undestanding of flickering consists in using the eclipse mapping method to probe the surface distribution of the flickering sources. We report on the analysis of light curves of the dwarf nova and strong flicker V2051 O...
متن کاملar X iv : a st ro - p h / 99 05 11 3 v 1 1 0 M ay 1 99 9 Spectral mapping of the accretion flow of UU Aquarii 1
Time-resolved spectroscopy of the novalike variable UU Aquarii is analyzed with eclipse mapping techniques to produce spatially resolved spectra of its accretion disc and gas stream as a function of distance from disc centre in the range 3600-7000Å. The spectrum of inner disc shows a blue continuum filled with deep, narrow absorption lines which transition to emission with clear P Cygni profile...
متن کاملChanges in the structure of the accretion disc of EX Draconis through the outburst cycle
We report on the analysis of high-speed photometry of the dwarf nova EX Dra through its outburst cycle with eclipse mapping techniques. The eclipse maps show evidence of the formation of a one-armed spiral structure in the disc at the early stages of the outburst and reveal how the disc expands during the rise until it fills most of the primary Roche lobe at maximum light. During the decline ph...
متن کامل