Journal ArticleDOI
Relativistic motion in a nearby bright X-ray source
Steven Tingay,David L. Jauncey,Robert A. Preston,John Reynolds,David L. Meier,David W. Murphy,Anastasios Tzioumis,D. J. McKay,Michael Kesteven,James E. J. Lovell,D. Campbell-Wilson,S. P. Elllngsen,R. G. Gough,Richard W. Hunstead,D. L. Jonos,P. M. McCulloch,Victor Migenes,J. F. H. Quick,M. W. Sinclair,Derck P. Smits +19 more
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TLDR
In this paper, the authors reported high-resolution radio observations of a second Galactic superluminal radio source GRO J1655-40, which was detected as an X-ray transient on 27 July 1994.Abstract:
The recent discovery of radio components apparently moving away from a Galactic source of transient X-ray emission faster than the speed of light (superluminal motion) has identified a low-energy Galactic counterpart to quasars. Here we report high-resolution radio observations of a second Galactic superluminal radio source GRO J1655-40, which was detected as an X-ray transient on 27 July 1994. Our radio images reveal two components moving away from each other at an angular speed of 65 ± 5 mas d -1 , corresponding to superluminal motion at the estimated distance of 3–5 kpc. The 12-day delay between the X-ray and radio outbursts suggests that the ejection of material at relativistic speeds occurs during a stable phase of accretion onto a black hole, which follows an unstable phase with a high accretion rate.read more
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Journal ArticleDOI
Sources of Relativistic Jets in the Galaxy
I. F. Mirabel,Luis F. Rodríguez +1 more
TL;DR: In this article, it was shown that the ejecta in microquasars move with relativistic speeds similar to those believed to be present in quasars and are thus referred to as microquasar ejecta.
Journal ArticleDOI
First Results from the All-Sky Monitor on the Rossi X-Ray Timing Explorer
Alan M. Levine,Hale Bradt,Wei Cui,J. G. Jernigan,Edward H. Morgan,Ronald A. Remillard,R. Shirey,Donald A. Smith +7 more
TL;DR: The Rossi X-Ray Timing Explorer has been monitoring the sky in the 1.5-12 keV band since late February as discussed by the authors, with three coded-aperture cameras rotating to view different regions by a motorized drive assembly.
Journal ArticleDOI
Episodic ejection of relativistic jets by the X-ray transient GRO J1655 - 40
R. M. Hjellming,Michael P. Rupen +1 more
TL;DR: In this article, the radio emission of two relativistic jets, one on each side of the source, was observed to expand and decay over a few days, at 92% of the speed of light, appears episodic and asymmetric.
Journal ArticleDOI
Science with ASKAP: The Australian square-kilometre-array pathfinder
Simon Johnston,R. Taylor,Matthew Bailes,Norbert Bartel,Carlton M. Baugh,Michael Bietenholz,Chris Blake,Robert Braun,Jo-Anne Brown,Shami Chatterjee,Jeremy Darling,Adam T. Deller,Richard Dodson,Philip G. Edwards,Ronald D. Ekers,Simon Ellingsen,Ilana Feain,Bryan Gaensler,Marijke Haverkorn,George Hobbs,Andrew M. Hopkins,C. A. Jackson,C. W. James,G. Joncas,V. M. Kaspi,Virginia A. Kilborn,Baerbel Koribalski,Roland Kothes,T. L. Landecker,A. Lenc,James E. J. Lovell,Jean-Pierre Macquart,Richard N. Manchester,Deanna Matthews,Naomi McClure-Griffiths,Ray P. Norris,Ue-Li Pen,Chris Phillips,Chris Power,R. J. Protheroe,Elaine M. Sadler,Brian P. Schmidt,Ingrid H. Stairs,Lister Staveley-Smith,J. M. Stil,Steven Tingay,Anastasios Tzioumis,Mark Walker,Jasper Wall,M. Wolleben +49 more
TL;DR: The Australian SKA Pathfinder (ASKAP) as mentioned in this paper is aimed squarely in this frequency range, and achieves instantaneous wide-area imaging through the development and deployment of phase-array feed systems on parabolic reflectors.
References
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Journal ArticleDOI
Hydromagnetic flows from accretion discs and the production of radio jets
Roger Blandford,D.G. Payne +1 more
Journal ArticleDOI
A superluminal source in the galaxy
TL;DR: In this paper, the first apparent superluminal motion was detected in a source within our own Galaxy and the optical, infrared and X-ray properties suggest that the source is either a neutron star or a black hole that is ejecting matter in a process similar to, but on a smaller scale than that seen in quasars.
Journal Article
Superluminal Radio Sources
J. A. Zensus,T. J. Pearson +1 more
TL;DR: There are now at least 23 radio sources in which apparent superluminal motion has been found as mentioned in this paper, and the effect is not limited to the classic examples like 3C 345, but is found in objects with a wide range of characteristic properties.
Related Papers (5)
Episodic ejection of relativistic jets by the X-ray transient GRO J1655 - 40
R. M. Hjellming,Michael P. Rupen +1 more
Hydromagnetic flows from accretion discs and the production of radio jets
Roger Blandford,D.G. Payne +1 more