Tuesday , February 7 2023

20 minutes – huge fountains discovered in galactic clusters


One million light years away – at this distance there is the unusually bright galaxy cluster Abell 2597, which contains about 50 individual galaxies.


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One of them, Abell's 2597 Brightest Cluster Galaxy, is right in the center and is the source of a gigantic molecular gas fountain, now researchers from the Harvard-Smitsonian Astrophysical Center Grant Tremblaya have been created.

Intergalactic flood

Based on a large black hole in the heart of the Abell 2597 Brightest Cluster Galaxy, molecules that are discarded are emitted into space, the waves return to the black hole as intergalactic drainage, as the team writes in an astrophysical journal.

"This may be the first system in which we find clear evidence of the flow of cold molecular gas into the black hole along with its ejection or sputum (narrow-flow substance flow, editorial note) that triggers a black hole," Tremblay said in a statement. The black hole in this huge in the center of the galaxy it looks like a "mechanical pump in a fountain".

US research using European technology

The findings were obtained using the so-called Atacama Large Millimeter / Sublime Array (ALMA) and the MUSE Spectrograph at the Very Large Telescope at the European Southern Observatory (ESO).

ALMA researchers detected the position of carbon monoxide (CO) molecules and motion fog. These cold molecules with a temperature of up to -260 degrees Celsius go inward into a black hole. The MUSE spectrograph was used to study the warmer gas that was pushed out in the form of a jet off the black hole.

Important in the future

Together, both sets of data give a complete picture of the process: the cold gas strikes a black hole, rapidly accelerates it around and heat it frictionly before it is removed at high speed with a jet, because the glowing plasma is left in the room,

These jets are made out of a black hole, such as the spectacular galactic fountain. Without the hope of escaping from the gravitational gravity of the galaxy, the plasma cools down and eventually falls into a black hole where the cycle starts again.

The results could illuminate the life cycle of the galaxy. Scientists think that this process may not only be widespread, but may also be relevant to understanding the formation of a galaxy.


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