Astronomers in California and Germany studying quasar UM287 spotted an enormous strand of nebulous gas
illuminated by the quasar's light, like an attic window lighting up otherwise unseen cobwebs.
In which radio signals
emitted by quasars billions of light - years a way serve as benchmarks fo r measuring the earth s wobble, tiny changes in its spin rate and the imperceptible drift of its plates
The central part of the quasar is located in the center, and a part of the jet
ejected by the quasar is seen in right.
«We didn't expect a signal that bright, so we came up with the name QUASR,
inspired by quasars, the extremely luminous celestial objects that can be a trillion times brighter than the sun,» Meagher said.
(The team announced today that the record is now
held by a quasar that formed only 800 million years after the Big Bang.)
«Both the star clusters in Hanny's Voorwerp and the expanding bubble in the galaxy's core hint at a strong outflow of gas,
fostered by a quasar,» says Keel.
This carbon signature, however, is considerably offset from the gas first
detected by quasar absorption.
On the astrophysics side, Gerry is
fascinated by quasars which are by far the brightest astronomical objects.
The blue / white narrow beam indicates the small area of the DLA gas cloud
probed by quasars, the wider red cone of light indicates the large area of the DLA probed by galaxies, which is a 100 million-fold increase in area.
The idea that the tremendous amounts of energy
released by quasars results from material being drawn into a black hole at the center of a galaxy quickly rose as the leading explanation.
This image combines observations from the Very Large Telescope, tuned to detect the fluorescent emissions
produced by the quasar illuminating the dark galaxies, with colour data from the Digitized Sky Survey 2.
Neil Gehrels, project scientist for Compton, says the gamma rays come from jets of material
emitted by quasars, and that the 11 sources picked up are all jets pointing towards the Earth.
«It is really amazing that this discovery was made the same night of the Slug Nebula while we were hunting for giant Lyman alpha nebulae
illuminated by quasars — my first night at Keck Observatory and definitely the most exciting observing night I have ever had!»
According to astronomer and team leader William Keel of the University of Alabama, Tuscaloosa, the presence of these young stars indicates that jets of fast - moving particles — which are
ejected by quasars — bombarded the gas cloud.
The observatory includes three radio telescopes for Very Long Baseline Interferometry (VLBI), which receive radio waves emitted
by quasars.
As seen from Keck Observatory, the green colors highlight the energetic gas across the galaxy that is being illuminated
by the quasar.
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