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 ?
"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.
Once a mystery, the variable star SS 433 in Aquila was the first "microquasar" discovered.
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.
In this work, we assume that this is the dominant mechanism generating high energy [gamma]-rays in the SS433 microquasar jets.
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.
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.
The star is pouring enough gas toward the hole to turn it into a "microquasar"; the hole emits blobby jets from the direction of its poles at 98% of the speed of light.
Two teams have now made the first definitive detection of high-energy gamma rays from this system, a microquasar known as Cygnus X-3.
In hadronic microquasar jets, the proton-proton interactions with the subsequent decay of the secondary particles, mostly [[pi].sup.[+ or -]] mesons, produce high-energy neutrinos.
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.