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Varnière Peggy, Vincent Frédéric

Reproducing the Correlations of Type C Low-frequency Quasi-periodic Oscillation Parameters in XTE J1550--564 with a Spiral Structure

The Astrophysical Journal, 2017, vol. 834

Référence DOI : 10.3847/1538-4357/834/2/188
Référence ADS : 2017ApJ...834..188V

Résumé :

While it has been observed that the parameters intrinsic to the type C low-frequency quasi-periodic oscillations are related in a nonlinear manner among themselves, there has been, up to now, no model to explain or reproduce how the frequency, the FWHM, and the rms amplitude of the type C low-frequency quasi-periodic oscillations behave with respect to one another. Here we are using a simple toy model representing the emission from a standard disk and a spiral such as that caused by the accretion--ejection instability to reproduce the overall observed behavior and shed some light on its origin. This allows us to prove the ability of such a spiral structure to be at the origin of flux modulation over more than an order of magnitude in frequency.

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