# {Accretion disc wind variability in the states of the microquasar GRS 1915+105}

### Citation:

{Neilsen} J, {Petschek} A J, {Lee} J C. {Accretion disc wind variability in the states of the microquasar GRS 1915+105}. MNRAS. 2012;421 :502-511.

### Abstract:

{Continuing our study of the role and evolution of accretion disc winds in the microquasar GRS 1915+105, we present high-resolution spectral variability analysis of the {$\beta$} and {$\gamma$} states with the Chandra High-Energy Transmission Grating Spectrometer. By tracking changes in the absorption lines from the accretion disc wind, we find new evidence that radiation links the inner and outer accretion discs on a range of time-scales. As the central X-ray flux rises during the high-luminosity {$\gamma$} state, we observe the progressive overionization of the wind. In the {$\beta$} state, we argue that changes in the inner disc leading to the ejection of a transient 'baby jet' also quench the highly ionized wind from the outer disc. Our analysis reveals how the state, structure and X-ray luminosity of the inner accretion disc all conspire to drive the formation and variability of highly ionized accretion disc winds. }

### Notes:

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Last updated on 02/08/2018