observational overview of state transitions in x-ray binaries
observational overview of state transitions in x-ray binaries
observational overview of state transitions in x-ray binaries
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• black hole transients<br />
• light curves, hardness-<strong>in</strong>tensity diagrams (HID)<br />
• implications for accretion flows<br />
• black hole <strong>state</strong>s (classification)<br />
• variability (quasi-periodic oscillations - QPOs)<br />
• jets, w<strong>in</strong>ds - relation to <strong>state</strong>s<br />
• neutron star transients<br />
OUTLINE<br />
Here’s a brief outl<strong>in</strong>e <strong>of</strong> the talk. Most <strong>of</strong> my talk will deal with black hole systems, as our<br />
knowledge <strong>of</strong> the different <strong>state</strong>s appears to be a bit more complete. I’ll start with an<br />
<strong>overview</strong> <strong>of</strong> transient outbursts and will <strong>in</strong>troduce the hardness-<strong>in</strong>tensity diagram, which is<br />
useful tool to study the spectral evolution <strong>of</strong> transients. I’ll discuss some <strong>of</strong> the implications<br />
<strong>of</strong> the observed evolution for accretion flows. I’ll go on to identify the various <strong>state</strong>s <strong>in</strong> the<br />
HID and summarize their spectral and variability properties.<br />
I’ll cont<strong>in</strong>ue by show<strong>in</strong>g how the different types <strong>of</strong> variability map onto the hardness <strong>in</strong>tensity<br />
diagram. I will do the same for jets and w<strong>in</strong>ds.<br />
I’ll end with a brief comparison with neutron stars, where a lot <strong>of</strong> progress has been made<br />
recently.
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