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We present new insights about accretion and ejection physics based on jointRXTE/Chandra HETGS studies of rapid X-ray variability in GRS 1915+105. For thefirst time, with fast phase-resolved spectroscopy of the rho state, we are ableto show that changes in the broadband X-ray spectrum (RXTE) on timescales ofseconds are associated with measurable changes in absorption lines (ChandraHETGS) from the accretion disk wind. Additionally, we make a direct detectionof material evaporating from the radiation-pressure-dominated inner disk. OurX-ray data thus reveal the black hole as it ejects a portion of the inneraccretion flow and then drives a wind from the outer disk, all in a bizarrecycle that lasts fewer than 60 seconds but can repeat for weeks. We find thatthe accretion disk wind may be sufficiently massive to play an active role inGRS 1915+105, not only in quenching the jet on long timescales, but also inpossibly producing or facilitating transitions between classes of X-rayvariability.

The Physics of Disk Winds, Jets,and X-ray Variability in GRS 1915+105