Accretion Disc Wind Variability in the States of the Microquasar GRS 1915+105

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 over-ionization 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.

Accepted for publication in MNRAS. 11 pages, 7 figures, uses mn2e.cls. Comments welcome

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• Spectrum Synthesis Modeling of the X-ray Spectrum of GRO J1655-40 Taken During the 2005 Outburst
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• Radiation Pressure and Mass Ejection in Rho-like States of GRS 1915+105
• A NICER View of a Highly-Absorbed Flare in GRS 1915+105
• Exploring the Long-Term Evolution of GRS 1915+105
• The Case for Massive, Evolving Winds in Black Hole X-ray Binaries
• Wind, jet, hybrid corona and hard X-ray flares: multiwavelength evolution of GRO J1655-40 during the 2005 outburst rise
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• Super-Eddington Accretion in the Ultraluminous X-ray Source NGC1313 X-2: An Ephemeral Feast
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• An Empirical Method for Improving the Quality of RXTE HEXTE Spectra
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