observational overview of state transitions in x-ray binaries

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Relation between HID branches and states MAPPING THE STATES In the next few slides, I’ll summarize the properties of the various states and show how they map on to this hardness-intensity diagram of GRO J1655-40. Before I continue, first a few words on rapid X-ray variability, since together with X-ray spectra, it is a crucial ingredient of state classifications.
RAPID X-RAY VARIABILITY • power density spectra (1 mHz - 1 kHz) • broad (noise) and narrow (QPO) components • correlates with spectral properties and map well onto HID When I talk about rapid variability, I typically mean frequencies between 1 mHz and 1 kHz. This rapid variability is often studied terms in terms of power spectra, since most of the variability is too fast and/or too weak to be seen directly in the light curve. As Phil Uttley showed this morning, the power spectra often show combinations of broad components, which are often referred to as noise, and narrow features referred to as quasi-periodic oscillations, or QPOs. The rapid X-ray variability changes strongly between states and their evolution maps well onto the HID.
Page 1 and 2: !""#$%&'()*#'"$++$+)&(),-#!.+/ 4566
Page 3 and 4: MORE BACKGROUND • 1996>: Dedicate
Page 5 and 6: TRANSIENT SOURCES • Relation betw
Page 7 and 8: OUTBURST LIGHT CURVES 4U 1543-47 GR
Page 9 and 10: ENERGY DEPENDENCE This movie (Homan
Page 11 and 12: SPECTRAL EVOLUTION GX 339-4 First I
Page 13 and 14: COLOR EVOLUTION hardness-intensity
Page 15 and 16: Luminosity (erg/s) SPECTRAL EVOLUTI
Page 17 and 18: XTE J1752-223 XTE J1908+094 SPECTRA
Page 19 and 20: SPECTRAL EVOLUTION GRO J1655-40 I
Page 21 and 22: SPECTRAL EVOLUTION GRO J1655-40 We
Page 23 and 24: SPECTRAL EVOLUTION GX 339-4 Transit
Page 25 and 26: IMPLICATIONS FOR ACCRETION • outb
Page 27: STATE CLASSIFICATION • Various cl
Page 31 and 32: • low-luminosity version of the h
Page 33 and 34: INTERMEDIATE STATE Intermediate (tr
Page 35 and 36: RAPID X-RAY VARIABILITY Okay, let
Page 37 and 38: Power type-B frequency up 1 10 100
Page 39 and 40: No Compact Jet (interaction with IS
Page 41 and 42: GRO J1655-40 weak abs. lines weak e
Page 43 and 44: Aql X-1 NEUTRON STARS hard - soft -
Page 45 and 46: Aql X-1 Back to the HID again. NEUT
Page 47 and 48: hard transitional Lin et al. 2009 H
Page 49 and 50: Lin et al. 2009 Homan et al. 2010 N

observational overview of state transitions in x-ray binaries

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