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Several independent lines of evidence now point to a connection between the physical processes that govern radio (i.e. jet) and X–ray emission from accreting X–ray binaries. We present a comprehensive study of (quasi–)simultaneous radio:X–ray observations of stellar black hole binaries during the spectrally hard X–ray state, finding evidence for a strong(More)
We demonstrate that at relatively low mass accretion rates, black hole candidate (BHC) X-ray binaries (XRBs) should enter 'jet-dominated' states, in which the majority of the liberated accretion power is in the form of a (radiatively inefficient) jet and not dissipated as X-rays in the accretion flow. This result follows from the empirically established(More)
The dioxygen we breathe is formed by light-induced oxidation of water in photosystem II. O2 formation takes place at a catalytic manganese cluster within milliseconds after the photosystem II reaction centre is excited by three single-turnover flashes. Here we present combined X-ray emission spectra and diffraction data of 2-flash (2F) and 3-flash (3F)(More)
We report on the formation and evolution of a large-scale, synchrotron-emitting jet from the black hole candidate and X-ray binary system GX 339−4. In 2002 May, the source moved from a low/hard to a very high X-ray state, contemporaneously exhibiting a very bright optically thin radio flare. Further observations with the Australia Telescope Compact Array(More)
Deep observations with the Very Large Array of A0620–00, performed in 2005 August, resulted in the first detection of radio emission from a black hole binary at X-ray luminosities as low as 10 −8.5 times the Eddington limit. The measured radio flux density, of 51 ± 7 µJy at 8.5 GHz, is the lowest reported for an X-ray binary system so far, and is(More)
We present an application of valence to core X-ray emission spectroscopy to understand the electronic structure of the industrially relevant catalyst titanium silicalite-1. The experimental spectrum was modelled within density functional theory, adopting a one electron approach, investigating the effects of different basis sets, density functionals and(More)
Observations of V404 Cyg performed with the Westerbork Synthesis Radio Telescope at four frequencies, over the interval 1.4−8.4 GHz, have provided us with the first broadband radio spectrum of a 'quiescent' stellar mass black hole. The measured mean flux density is of 0.35 mJy, with a spectral index α = +0.09±0.19 (such that S ν ∝ ν α). Synchrotron emission(More)
Spitzer observations of the neutron star (ultra-compact) X-ray binary (XRB) 4U 0614+091 with the Infrared Array Camera reveal emission of non-thermal origin in the range 3.5-8 µm. The mid-infrared spectrum is well fit by a power law with spectral index of α = −0.57 ± 0.04 (where the flux density is F ν ∝ ν α). Given the ultra-compact nature of the binary(More)
Theoretical predictions show that depending on the populations of the Fe 3d xy , 3d xz , and 3d yz orbitals two possible quintet states can exist for the high-spin state of the photoswitchable model system [Fe(terpy) 2 ] 2+. The differences in the structure and molecular properties of these 5 B 2 and 5 E quintets are very small and pose a substantial(More)