Jet disc coupling in black hole binaries |
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Authors: | Julien Malzac |
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Institution: | (1) Centre d’Etude Spatiale des Rayonnements, OMP, UPS, CNRS, 9 Avenue du Colonel Roche, 31028 Toulouse, France |
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Abstract: | In the last decade multi-wavelength observations have demonstrated the importance of jets in the energy output of accreting
black hole binaries. The observed correlations between the presence of a jet and the state of the accretion flow provide important
information on the coupling between accretion and ejection processes. After a brief review of the properties of black hole
binaries, I illustrate the connection between accretion and ejection through two particularly interesting examples. First,
an INTEGRAL observation of Cygnus X-1 during a ‘mini-’ state transition reveals disc jet coupling on time scales of orders
of hours. Second, the black hole XTEJ1118+480 shows complex correlations between the X-ray and optical emission. Those correlations
are interpreted in terms of coupling between disc and jet on time scales of seconds or less. Those observations are discussed
in the framework of current models. |
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Keywords: | Radiation mechanisms: non-thermal Black hole physics Accretion accretion discs X-rays: binaries X-rays: individual: Cygnus X-1 X-rays: individual: XTE J1118+480 |
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