microquasar


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microquasar

[¦mī·krō ′kwā‚zär]
(astronomy)
An object in the Milky Way Galaxy that contains a black hole or neutron star and emits jets of material that exhibit superluminal motion and resemble those emitted from quasars.
References in periodicals archive ?
Ee "MQ1 is classed as a microquasar -- a black hole surrounded by a bubble of hot gas, which is heated by two jets just outside the black hole, powerfully shooting out energy in opposite directions, acting like cosmic sandblasters pushing out on the surrounding gas," Dr Soria said.
MQ1 is classed as a microquasar -a black hole surrounded by a bubble of hot gas, which is heated by two jets just outside the black hole, powerfully shooting out energy in opposite directions, acting like cosmic sandblasters pushing out on the surrounding gas", Soria said.
Revving up particles Newly recorded gamma rays from a microquasar may reveal how the black holes or neutron stars that power such cosmic beasts can accelerate particles to enormous energies (SN: 12/19/09, p.
This system of a black hole and its feeder star shines brightly in both radio waves and X-rays and is known collectively as the SS433 microquasar.
Two teams have now made the first definitive detection of high-energy gamma rays from this system, a microquasar known as Cygnus X-3.
This object, also known as a microquasar, blows a huge bubble of hot gas, 1000 light-years across, twice as large and tens of times more powerful than other known microquasars.
One, the electrons could come from a nearby astrophysical object, such as a pulsar or microquasar, that propelled the electrons to high energies.
Washington, November 27 (ANI): NASA's Fermi Gamma-ray Space Telescope has made the first unambiguous detection of high-energy gamma-rays from an enigmatic microquasar.
Possibilities include a pulsar, which is the highly magnetic, rotating remnant of a collapsed star, or a microquasar, the luminous, energetic collection of material orbiting a small black hole.
GRS 1915+105 is called a microquasar because its stream of X rays and blasts of radio-emitting gas resemble a scaled-down version of the action of quasars in faraway galaxies.
The combination of its superior location and experimental capabilities led to a long list of exciting discoveries of several very high energy (VHE) gamma ray sources over the past few years, including supernova remnants, the source at the Galactic Centre, compact binary systems, microquasars, pulsar wind nebulae, gamma rays from cosmic-ray interactions with dense molecular clouds, a starburst galaxy, stellar and galaxy clusters, active galactic nuclei, and "dark sources" with no obvious counterparts, in addition to conducting the first VHE survey of the sky, measuring the local cosmic-ray electron and iron nuclei spectra, constraining the level of extragalactic background light, and providing upper limits to dark mater annihilation.
Other topics include microquasars, massive star formation, red giant stars, geodesy, and new equipment and techniques.