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The National Insitutes of Natural Sciences have reported that these findings suggest that the galaxy clusters are the key environment for the evolution of these types of galaxies.
The discovery could reveal the secrets of how galaxies from in our universe.
Scientists have discovered these galaxies using the Subaru Telescope.
These galaxies contain extremely high levels of mysterious dark matter.
Jin Koda, principal investigator of the study said, “Not only [do] these galaxies appear very diffuse, but they are very likely enveloped by something very massive.”
Many of the galaxies are similar in size of the Milky Way, but have much fewer stars. The stars that do exist are regularly subjected to strong tidal forces, suggesting such as an excessive amount of dark matter must be protecting them. The galaxies within the cluster contain less than 1 percent of visible matter and 99 percent of dark matter. The visible matter is extremely low when compared to rest of the universe.
In order for the stars to have formed, the galaxy must have lost gas during the formation process billion of years ago. It is likely cluster environment played a key role in the loss of gas through factors such as ram pressure stripping by intra-cluster gas and gravitational interactions with other galaxies. The dark galaxies could help shed light on model of galaxy formation.
Koda said, “Follow-up spectroscopic observations in the future may reveal the history of star formation in these dark galaxies.”
Dark galaxies are first thought to have been discovered back in 2012.
The construction of Thirty Meter Telescope or TMT in future by an international partnership of institutions, including the National Astronomical Observatory of Japan could allow scientists to measure the motions of stars in detail and help solve the mystery of these dark galaxies.