Other
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.0818n&link_type=abstract
American Astronomical Society, HEAD meeting #12, #8.18
Other
Scientific paper
We present our complete, comprehensive Chandra HETGS study of the variability of accretion disk winds in the microquasar GRS 1915+105, highlighting new results on the bizarre β state. Renowned for its discrete jet ejections and its implications for the disk-jet connection around accreting black holes, the β state is a 30-minute limit cycle featuring strong X-ray spectral variability. Using two HETGS observations of this unusual oscillation, we reveal that the accretion disk wind is weakest during known intervals of jet formation, and strongest when the accretion disk is most variable. We show how the ionization state of the wind evolves during the cycle, and evaluate these results in the context of possible rapid physical interactions between the accretion disk wind and the radio jet. Comparing to our studies of the ρ and γ states and the long-term, global behavior of the wind, as well as observations of other microquasars, we discuss the role of accretion disk winds in black hole binaries on timescales as long as months and as short as 5 seconds.
Lee Jae-Chul
Neilsen Joseph
Remillard Ron
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