Using the European Southern Observatory’s Very Large Telescope (ESO’s VLT), astronomers have revealed the closest pair of supermassive black holes to Earth ever observed. The two objects also have a much smaller separation than any other previously spotted pair of supermassive black holes and will eventually merge into one giant black hole. Located in the galaxy NGC 7727 in the constellation Aquarius, the supermassive black hole pair is about 89 million light-years away from Earth. Although this may seem distant, it beats the previous record of 470 million light-years by quite some margin, making the newfound supermassive black hole pair the closest to us yet. #ScienceUnmasked#Blackholes
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Using the European Southern Observatory's Very Large Telescope, astronomers have revealed
the closest pair of supermassive black holes to Earth ever observed. The two objects also
have a much smaller separation than any other previously spotted pair of supermassive black
holes and will eventually merge into one giant black hole. Located in the galaxy NGC 7727 in
the constellation Aquarius, the supermassive black hole pair is about 89 million light years
away from Earth. Although this may seem distant, it beats the previous record of 417 million light
years by quite some margin, making the newfound supermassive black hole pair the closest to us
yet. Welcome to Science Unmasked. Please subscribe and turn on the notification button so you can get
our latest videos. Supermassive black hole lurk at the center of massive galaxies and when two
such galaxies merge, the black hole end up on a collision course. The pair in NGC 7727 beat the
record for the smaller separation between two supermassive black holes, as they are observed
to be just 1,600 light years apart in the sky. Karina Vogel, an astronomer at the Strasbourg
Observatory in France, has led author to the study published in Astronomy and Astrophysics,
said it is the first time we find two supermassive black holes that are this close to each other,
less than half the separation of the previous record holder. Co-author Holger Baumgart, a
professor at the University of Queensland, Australia, said the merging of black holes
like these could explain how most massive black holes in the universe are formed. Professor
Baumgart said that the small separation and velocity of the two black holes indicate they
will merge into one monster black hole probably within the next 250 million years. Vogel and her
team were able to determine the masses of the two objects by looking at how the gravitational pull
of the black holes influences the motion of the stars around them. The bigger black hole located
right at the core of the NGC 7727 was found to have a mass almost 154 million times that of the
Sun, while the companion is 6.3 million solar masses. It is the first time the masses have
been measured in this way for a supermassive black hole pair. This feat was made possible
thanks to the close proximity of the system to Earth and the detailed observations the team
obtained at the Paranal Observatory in Chile. They used the multi-unit spectroscopic explorer
on the European Southern Observatory's Very Large Telescope, an instrument Vogel learned to work
with during her time as a student at the ESO. Measuring the masses with MUSE and using additional
data from the NASA Hubble Space Telescope allowed the team to confirm that the objects in the NGC
7727 were indeed supermassive black holes. Astronomers suspected that the galaxy hosted
the two black holes, but they had not been able to confirm their presence until now,
since we do not see large amounts of high-energy radiation coming from their immediate surroundings,
which would otherwise give them away, Vogel said. Our finding implies that there might be many more
of these relics of galaxy mergers out there and they may contain many hidden massive black holes
that are waiting to be found. It could increase the total number of supermassive black holes
known in the local universe by 30 percent. The search for similarly hidden supermassive black
hole pair is expected to make a great leap forward with ESO's Extremely Large Telescope,
ELT, set to start operating later this decade in Chile's Atacama Desert. Co-author Stefan Mieski,
an astronomer at ESO in Chile and head of ESO Paranormal Science Operations concluded,
this detection of a supermassive black hole pair is just the beginning. With the HARMONI
instrument on the ELT, we will be able to make detections like this considerably further than
currently possible. ESO's ELT will be integral to understanding these objects. That's all from
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