Jakarta, CNNI Indonesia —
Bintan usually tied to a particular galaxy. But experts have recently discovered ‘light ghosts of unbound galactic stars.
The spectral light comes from stars that are not gravitationally bound to a single galaxy or cluster. Launching the official NASA website, the existence of these no-one stars is known through images conducted by the Hubble Telescope.
“The new Hubble observations indicate that these stars have been traveling for billions of years and are not the result of recent dynamic activity within a galaxy cluster that ejected them from the normal galaxy,” he wrote. NASA.
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Galaxy SPT-CL J2106-5844, another phantom light source. (nasa.gov web screen)
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The existence of these “wandering” stars also raises questions from astronomers; why are these stars so scattered throughout the cluster?
Several theories have emerged, including the possibility that these stars were ejected from a galaxy cluster. Or, these stars were ejected after a number of galaxies merged.
Furthermore, there is also a theory that these stars existed at the very beginning of the formation of galaxy clusters billions of years ago.
The Hubble telescope itself identified their presence after conducting an infrared survey. The survey included 10 galaxy clusters about 10 billion light-years away from Earth.
The measurement has to be taken from space because the light within the cluster is 10,000 times fainter than the night sky when viewed from the plains.
Intracluster light was first discovered in 1951 by Fritz Zwicky. However, the Hubble telescope’s discoveries have provided experts with a number of new insights.
This investigation reveals that the ratio of intracluster light to total cluster light remains constant.
“This means that these stars have been homeless since the beginning of cluster formation,” said astronomer James Jee of Yonsei University in Seoul, South Korea, as quoted Space.
“In the early years of their formation, some galaxies can be very small and therefore throw galaxies very easily due to their weaker gravitational pull,” he added.
Additionally, the Hubble Telescope will continue to survey the universe for more intracluster light. At the same time, the James Webb Telescope will do the same.
It is hoped that the two observations from two different telescopes can help experts unravel the mystery of the birth of these nobody’s stars. Perhaps even the experts can reveal other things that are still mysterious.
The reason is that these stars can provide experts with insight into dark matter, an invisible material that makes up much of almost all material in the universe and whose gravitational force can hold galaxies together.
(leth)
