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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2005

A simple model for the complex lag structure of microquasars

P. Varniere

Résumé

The phase lag structure between the hard and soft X-ray photons observed in GRS 1915+105 and XTE J1550-564 has been said to be "complex" because the phase of the Quasi-Periodic Oscillation fundamental Fourier mode changes with time and because the even and odd harmonics signs behave differently. From simultaneous X-ray and radio observations this seems to be related to the presence of a jet (level of radio emission). We propose a simple idea where a partial absorption of the signal can shift the phases of the Fourier modes and account for the phase lag reversal. We also briefly discuss a possible physical mechanism that could lead to such an absorption of the quasi-periodic oscillation modulation.
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hal-00176030 , version 1 (12-02-2021)

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P. Varniere. A simple model for the complex lag structure of microquasars. Astronomy and Astrophysics - A&A, 2005, 434 (1), pp.L5-L8. ⟨10.1051/0004-6361:200500096⟩. ⟨hal-00176030⟩
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