Spectro-temporal evolution during the onset-phase of the 2011 outburst of IGR J17091-3624. Implications on accretion disk dynamics

A. Nandi; Nirmal Iyer

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Spectro-temporal evolution during the onset-phase of the 2011 outburst of IGR J17091-3624. Implications on accretion disk dynamics

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arxiv 1309.2379 v1 pith:QIU3ABIQ submitted 2013-09-10 astro-ph.HE

Nirmal Iyer , A. Nandi This is my paper · ORCID

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keywords evolutionphasestatej17091-3624outburstsourcex-rayaccreting

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We re-analysed the archival data of RXTE / INTEGRAL / Swift satellites at the onset phase of the 2011 outburst of the X-ray source IGR J17091-3624. The evolution of the spectral and temporal properties of the source in this phase clearly exhibits state transition as Hard (HS) to Hard-Intermediate (HIMS) to Soft-Intermediate (SIMS) to Soft (SS) state, before entering the variability phase (VP).We attempt to understand the evolution of X-ray features and the state transitions based on two different types of accreting material (i.e, the Keplerian and sub-Keplerian flow).

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