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NASA : NASA's WISE Spacecraft Discovers Most Luminous Galaxy in Universe .- NASA's WISE Spacecraft, descubre la galaxia más luminosa del Universo...
Hola amigos: A VUELO DE UN QUINDE EL BLOG., hemos recibido información de la Agencia Espacial NASA, sobre el descubrimiento de la Galaxia WISE
J224607.57-052635.0, que es la mas luminosa del Universo, efectuada por el Telescopio NASA's Wide-field Infrared Survey
Explorer (WISE), ésta galaxiamás luminosaencuentraactualizada ypertenece a una nuevaclase de objetosrecientemente descubiertospor WISE-Galaxias InfrarrojasmuyLuminosos, oELIRGs.
More information........... http://www.nasa.gov/press-release/nasas-wise-spacecraft-discovers-most-luminous-galaxy-in-universe
This artist's concept depicts the current record
holder for the most luminous galaxy in the universe. The galaxy, WISE
J224607.57-052635.0, is erupting with light equal to more than 300
trillion suns. It was discovered using data from NASA's WISE mission.
A remote galaxy shining with the light of more than 300 trillion suns
has been discovered using data from NASA's Wide-field Infrared Survey
Explorer (WISE). The galaxy is the most luminous galaxy found to date
and belongs to a new class of objects recently discovered by WISE --
extremely luminous infrared galaxies, or ELIRGs.
"We are looking at a very intense phase of galaxy evolution," said
Chao-Wei Tsai of NASA's Jet Propulsion Laboratory (JPL) in Pasadena,
California, lead author of a new report appearing in the May 22 issue of
The Astrophysical Journal. "This dazzling light may be from the main
growth spurt of the galaxy’s black hole."
The brilliant galaxy, known as WISE J224607.57-052635.0, may have a
behemoth black hole at its belly, gorging itself on gas. Supermassive
black holes draw gas and matter into a disk around them, heating the
disk to roaring temperatures of millions of degrees and blasting out
high-energy, visible, ultraviolet, and X-ray light. The light is blocked
by surrounding cocoons of dust. As the dust heats up, it radiates
Immense black holes are common at the cores of galaxies, but finding
one this big so “far back” in the cosmos is rare. Because light from the
galaxy hosting the black hole has traveled 12.5 billion years to reach
us, astronomers are seeing the object as it was in the distant past. The
black hole was already billions of times the mass of our sun when our
universe was only a tenth of its present age of 13.8 billion years.
The new study outlines three reasons why the black holes in the
ELIRGs could have grown so massive. First, they may have been born big.
In other words, the "seeds," or embryonic black holes, might be bigger
than thought possible.
"How do you get an elephant?" asked Peter Eisenhardt, project
scientist for WISE at JPL and a co-author on the paper. "One way is
start with a baby elephant."
The other two explanations involve either breaking or bending the
theoretical limit of black hole feeding, called the Eddington limit.
When a black hole feeds, gas falls in and heats up, blasting out light.
The pressure of the light actually pushes the gas away, creating a limit
to how fast the black hole can continuously scarf down matter. If a
black hole broke this limit, it could theoretically balloon in size at a
breakneck pace. Black holes have previously been observed breaking this
limit; however, the black hole in the study would have had to
repeatedly break the limit to grow this large.
Alternatively, the black holes might just be bending this limit.
"Another way for a black hole to grow this big is for it to have gone
on a sustained binge, consuming food faster than typically thought
possible," said Tsai. "This can happen if the black hole isn't spinning
If a black hole spins slowly enough, it won't repel its meal as much.
In the end, a slow-spinning black hole can gobble up more matter than a
"The massive black holes in ELIRGs could be gorging themselves on
more matter for a longer period of time," said Andrew Blain of
University of Leicester in the United Kingdom, a co-author of this
report. "It's like winning a hot-dog-eating contest lasting hundreds of
millions of years."
More research is needed to solve this puzzle of these dazzlingly
luminous galaxies. The team has plans to better determine the masses of
the central black holes. Knowing these objects’ true hefts will help
reveal their history, as well as that of other galaxies, in this very
crucial and frenzied chapter of our cosmos.
WISE has been finding more of these oddball galaxies in infrared
images of the entire sky captured in 2010. By viewing the whole sky with
more sensitivity than ever before, WISE has been able to catch rare
cosmic specimens that might have been missed otherwise.
The new study reports a total of 20 new ELIRGs, including the most
luminous galaxy found to date. These galaxies were not found earlier
because of their distance, and because dust converts their powerful
visible light into an incredible outpouring of infrared light.
"We found in a related study with WISE that as many as half of the
most luminous galaxies only show up well in infrared light," said Tsai.
JPL manages and operates WISE for NASA's Science Mission Directorate
in Washington. The spacecraft was put into hibernation mode in 2011,
after it scanned the entire sky twice, thereby completing its main
objectives. In September 2013, WISE was reactivated, renamed NEOWISE and
assigned a new mission to assist NASA's efforts to identify potentially
hazardous near-Earth objects.