APR 25, 2018 5:33 PM PDT

Astronomers Spy On An Ancient Galaxy Megamerger

WRITTEN BY: Anthony Bouchard

All thanks to observations made by both the Atacama Large Millimeter/submillimeter Array (ALMA) and South Pole Telescope (SPT), an international team of astronomers say that they’ve observed a galaxy megamerger involving 14 bright galaxies near at the edge of the observable universe.

A blown-up view of the 14 smaller galaxies as they inch closer toward the formation of a massive galaxy cluster at the edge of the observable universe.

Image Credit: ALMA (ESO/NAOJ/NRAO), T. Miller & S. Chapman et al.; Herschel; South Pole Telescope; (NRAO/AUI/NSF) B. Saxton

The astronomers discuss their findings in a paper published this week in the journal Nature. The 14 galaxies appear to be on a collision course, and computer models indicate that a super-sized galaxy cluster may result. The team has named the cluster SPT2349-56.

Worthy of note, SPT2349-56 is more than 12.4 billion light-years away, so we don't see it in real-time. There’s a 12.4 billion-year delay before the light emanating from it reaches Earth, so we effectively see what it looked like just 1.4 billion years after the Big Bang.

“Having caught a massive galaxy cluster in throes of formation is spectacular in and of itself, but the fact that this is happening so early in the history of the universe poses a formidable challenge to our present-day understanding of the way structures form in the universe,” explained Scott Chapman of Dalhousie University, a co-author of the study.

Related: Hubble spots two colliding galaxy clusters

As it would seem, the 14 galaxies observed in the study occupy a region of space just three times larger than the Milky Way itself. Furthermore, they’re so young that they appear to be forming new stars between 50 and 1,000 times faster than our own galaxy.

“How this assembly of galaxies got so big so fast is a bit of a mystery, it wasn't built up gradually over billions of years, as astronomers might expect,” added study co-author Tim Miller from Yale University.

“This discovery provides an incredible opportunity to study how galaxy clusters and their massive galaxies came together in these extreme environments.”

Related: Galaxy cluster from the early universe presents itself to astronomers

The observations may not seem like much at first glance, but it’s actually a treasure trove of valuable knowledge for experienced researchers. This discovery illustrates subtle features about what the early universe may have been like, and more importantly, it offers a unique opportunity to study galaxy cluster formation in detail.

It goes without saying that SPT2349-56 might teach us a thing or two…

Source: National Radio Astronomy Observatory

About the Author
Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
AUG 19, 2022
Chemistry & Physics
Ever Wondered What Our Universe Sounds Like?
AUG 19, 2022
Ever Wondered What Our Universe Sounds Like?
Our Universe is quite a dynamic environment with stars exploding to their deaths, black holes merging, stars being torn ...
SEP 28, 2022
Space & Astronomy
Is An Ancient Moon Responsible for Saturn's Rings?
SEP 28, 2022
Is An Ancient Moon Responsible for Saturn's Rings?
In a recent study published in Science, a team of researchers led by the Massachusetts Institute of Technology suggest t ...
OCT 11, 2022
Space & Astronomy
'The Life of Her Mind' Episode 2: Dr. Alyssa Rhoden
OCT 11, 2022
'The Life of Her Mind' Episode 2: Dr. Alyssa Rhoden
The Life of Her Mind is dedicated to learning about how these women think — how they think about their careers, di ...
OCT 18, 2022
Space & Astronomy
Supercomputer Divulges Immediate Formation of Moon
OCT 18, 2022
Supercomputer Divulges Immediate Formation of Moon
Numerous theories have evolved over the years as to how the Earth’s Moon came to be, with one early theory suggest ...
NOV 26, 2022
Space & Astronomy
Could We Find Life in Caves Off Earth?
NOV 26, 2022
Could We Find Life in Caves Off Earth?
In two connected studies published in the Journal of Geophysical Research: Planets, “Fundamental Science and Engin ...
DEC 02, 2022
Space & Astronomy
What is Cosmic Radiation?
DEC 02, 2022
What is Cosmic Radiation?
Labroots recently covered a hibernation study that examines how this technology can potentially protect future astronaut ...
Loading Comments...