12 Result(s)
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Article
R. P. Fender
English
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Article
An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070
Black holes in binary systems execute patterns of outburst activity where two characteristic X-ray states are associated with different behaviours observed at radio wavelengths. The hard state is associated wi...
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Observation of inverse Compton emission from a long γ-ray burst
Long-duration γ-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterized by an initial phase of bright and highly variable radi...
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Article
Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus
In the past two decades, high-amplitude electromagnetic outbursts have been detected from dormant galaxies and often attributed to the tidal disruption of a star by the central black hole1,2. X-ray emission from ...
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An elevation of 0.1 light-seconds for the optical jet base in an accreting Galactic black hole system
Relativistic plasma jets are observed in many systems that host accreting black holes. According to theory, coiled magnetic fields close to the black hole accelerate and collimate the plasma, leading to a jet ...
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Article
Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
A sustained, neutral wind from the outer accretion disk is observed in the transient black hole V404 Cygni during a violent outburst; this unusual wind, which expands at one per cent of the speed of light and ...
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A close-pair binary in a distant triple supermassive black hole system
A triple supermassive black hole system has been found that shows helical modulation of the large-scale radio jets; this modulation is caused by two of the black holes being tightly coupled as a binary system.
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Active galactic nuclei as scaled-up Galactic black holes
The central engines that drive active galactic nuclei are thought to be supermassive black holes. A long-standing question in astrophysics is whether these central engines vary like Galactic black hole systems...
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Finding Faint Intermediate-Mass Black Holes in the Radio Band
We discuss the prospects for detecting faint intermediate-mass black holes, such as those predicted to exist in the cores of globular clusters and dwarf spheroidal galaxies. We briefly summarize the difficulti...
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An expanding radio nebula produced by a giant flare from the magnetar SGR 1806–20
On 27 December last year, SGR1806–20, a soft γ-ray repeater in Sagittarius, released a giant flare that has been called the brightest explosion ever recorded. SGRs are X-ray stars that sporadically emit low-en...
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Circular Polarisation Observations of SS433
We present four epochs of observations of the Galactic X-ray binarySS433 using the Australian Telescope Compact Array (ATCA). These observations, taken on 4 February, 29 February, 23 March and 27 June 2000, at...
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Article
The Disc – Jet Connection in GRS 1915+105
We present an analysis of simultaneous X-ray and radio observations of the black hole candidate GRS 1915+105.
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ASOCAM Observations of CYG X-3: Search for a Hot Stellar Wind
Six CAM observations have been made in the 4 - 14 µm wavelength region to search for further evidence of emission from a hot stellar wind. Initial results suggest that the spectrum detected by Fender et al. us...
