New radio images of galaxies
with bright quasar cores show that, though the galaxies appear normal in visible - light images, their gas has been disrupted by encounters with other galaxies.
Not exact matches
And starting
with seeds in this range alleviates the timing problem for the production of the supermassive black holes that power the
brightest, most distant
quasars.
But the realization that
quasars were really out at the edge of the observable universe, and thus must be far
brighter than the
brightest galaxy, posed a riddle that nobody has yet been able to answer
with certainty: What are they?
Shining
with the equivalent of 420 trillion suns, the new
quasar is seven times
brighter than the most distant
quasar known (which is 13 billion years away).
«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 scientists used the National Science Foundation's Very Long Baseline Array (VLBA), a continent - wide radio - telescope system, along
with the 100 - meter radio telescope in Effelsberg, Germany, to make an extremely precise observation when the planet Jupiter passed nearly in front of a
bright quasar on September 8, 2002.
The first stars lit up a few - hundred - million - years - long «Dark Age»
with spectacular intensity, leading to the rapid creation of heavy elements and black holes that coalesced to form
bright quasars (more).
Subsequently, however, an even more distant
quasar with a tentative redshift of z = 6.40 was announced on January 9, 2003, near the SDSS detection limit of a redshift of z ~ 6.5 for
bright quasars, and other teams of astronomers detected even more distant, fast - star - forming irregular proto - galaxies, including: gravitationally - lensed HCM 6A behind galaxy cluster Abell 370
with a redshift of z ~ 6.56, which appears to be converting about 40 Solar - masses into stars annually; (PhysicsWeb; IFA press release; Hu et al, 2002, in pdf; and erratum); and the possible «superwind - galaxy» LAE J1044 - 0130 (Subaru press release; and Ajiki et al, 2002, in pdf).
The galaxy hosts a
bright quasar that may have illuminated the ghostly structure by hitting it
with a beam of light from hot gas around a central black hole.
But we haven't fully connected our theories to what we observe, especially
with quasars, these incredibly
bright centers of very distant galaxies that serve as beacons of the early universe.