Infrared photometry of Nova MUSCAE 1991 (=GS 1124-68)
We have obtained an H-band infrared light curve of the low-mass X-ray binary transient Nova Muscae 1991. We model the light curve as being due to the tidal...
Infrared spectroscopy of V404 Cygni: limits on the accretion disc contamination
We have obtained for the first time 2.10-2.45 μm infrared spectra of the soft-X-ray transient V404 Cygni. We determine a 95 per cent confidence upper limit to...
Investigating accretion disk - radio jet coupling across the stellar mass scale
Relationships between the X-ray and radio behavior of black hole X-ray binaries during outbursts have established a fundamental coupling between the accretion...
In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to γ-ray energies, the contribution of the...
Large-scale radio nebula around the Ultra-Luminous X-ray Source IC 342 X-1
We present discovery of a radio nebula associated with the ultraluminous X-ray source (ULX) IC 342 X-1 using the Very Large Array (VLA). Taking the surrounding...
Light-curve models for a pulsar orbiting a Kerr black hole
We have studied the signal received by a distant observer from a pulsar orbiting a stellar black hole. The binary system has a non-eccentric orbit and the most...
Limits on the Mass and Abundance of Primordial Black Holes from Quasar Gravitational Microlensing
The idea that dark matter can be made of intermediate-mass primordial black holes (PBHs) in the 10 M ⊙ ≲ M ≲ 200 M ⊙ range has recently been reconsidered...
Limits on the quiescent radio emission from the black hole binaries GRO J1655-40 and XTE J1550-564
We present the results of radio observations of the black hole binaries GRO J1655-40 and XTE J1550-564 in quiescence, with the upgraded Australia Telescope...
Massive Relic Galaxies Challenge the Co-evolution of Super-massive Black Holes and Their Host Galaxies
We study a sample of eight massive galaxies that are extreme outliers (3–5σ) in the {M}\bullet ‑ Mbulge local scaling relation. Two of these galaxies are...