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We investigated the relation between compact jet emission and X-rayvariability properties of all black hole transients with multiwavelengthcoverage during their outburst decays. We studied the evolution of all powerspectral components (including low frequency quasi-periodic oscillations), andrelated this evolution to changes in jet properties tracked by radio andinfrared observations. We grouped sources according to their tracks inradio/X-ray luminosity relation, and show that the standards show strongerbroadband X-ray variability than outliers at a given X-ray luminosity when thecompact jet turned on. This trend is consistent with the internal shock modeland can be important for the understanding of the presence of tracks in theradio/X-ray luminosity relation. We also observed that the total and the QPOrms amplitudes increase together during the earlier part of the outburst decay,but after the compact jet turns either the QPO disappears or its rms amplitudedecreases significantly while the total rms amplitudes remain high. We discussthese results with a scenario including a variable corona and a non-variabledisk with a mechanism for the QPO separate from the mechanism that create broadcomponents. Finally, we evaluated the timing predictions of the magneticallydominated accretion flow model which can explain the presence of tracks in theradio/X-ray luminosity relation.

Complete Multiwavelength Evolution of Galactic Black Hole Transients During Outburst Decay II: Compact Jets and X-ray Variability Properties