In an event never-seen before, NASA astronomers witnessed
how a powerful jet from a super massive black hole is blasting a nearby galaxy.
According to NASA, this cosmic phenomenon was observed in a system
known as 3C321, which contains two galaxies in orbit around each other. The
system is 1.4 billion light years away and each galaxy is formed around massive
black hole.
The scientists said that the larger galaxy has a jet
emanating from the vicinity of its black hole. The smaller galaxy apparently
has swung into the path of this jet.
The 3C321 system was discovered through the combined effort
of NASA's Chandra X-ray Observatory, Hubble Space Telescope, and Spitzer Space
Telescope. The Very Large Array telescope, Socorro,
N.M., and the Multi-Element Radio Linked Interferometer
Network (MERLIN) telescopes in the United Kingdom also were needed for
the finding.
According to the scientist, jets from super massive black
holes produce high amounts of high-energy X-rays and gamma-rays and their combined
effects could severely damage the atmospheres of planets lying in the path of
the jet.
Jets produced by super massive black holes transport enormous
amounts of energy far from black holes and enable them to affect matter on
scales vastly larger than the size of the black hole.
As Dan Evans, a scientist at the Harvard-Smithsonian Center
for Astrophysics and leader of the study, this phenomenon is unique because it’s
the first time when such a collision can be observed.
"We've seen many jets produced by black holes, but this
is the first time we've seen one punch into another galaxy like we're seeing
here," said Dan Evans. "This jet could be causing all sorts of
problems for the smaller galaxy it is pummeling."
According to the images obtained by the scientists, the effect
of the jet on the smaller galaxy will be substantial, as the two galaxies are
at a distance of only about 20,000 light years. Also, the features in the Very
Large Array and Chandra images indicate that the jet began impacting the galaxy
about one million years ago, a small fraction of the system's lifetime.
For the scientists, the possibility to study such a
phenomeon can be used to better understand the basic properties of the jet.
"We see jets all over the universe, but we're still
struggling to understand some of their basic properties," said
co-investigator Martin Hardcastle of the University
of Hertfordshire in the United Kingdom.
"This system of 3C321 gives us a chance to learn how they're affected when
they slam into something like a galaxy and what they do after that."
But, as the astronomers said, this “galactic
violence” could have some benefits after all. The massive influx of energy from
the jet could induce the formation of large numbers of stars and planets after
its initial wake of destruction is complete, the astronomers explained.
Photo Credit: Nasa/CXC/CfA/D.Evans et
al/STScI/NSF/VLA/STFC/JBO/MERLIN