Pegasus V was first discovered when amateur astronomer Giuseppe Donatiello discovered an interesting "spot" in
To study the new galaxy of astrophysicsused data from the larger 8.1-meter Gemini North telescope. They found faint stars in Pegasus V. At the same time, the researchers found that this galaxy has extremely few heavy elements compared to similar dwarf galaxies. This means that it was formed at the very beginning of the formation of the Universe after the Big Bang.
Pegasus V. Image: International Gemini Observatory, NOIRLab, NSF, AURA
In addition, scientists have discovered in Pegasus V a largeconcentration of old stars. They believe that these are relic fossils of the first galaxies. Compared to other faint galaxies around Andromeda, Pegasus V appears uniquely old and metal-poor, indicating that its star formation did indeed cease very early, the scientists add.
The Problem With These Extremely Faint Galaxiesis that they have very few bright stars, which we usually use to identify them and measure distances. Using the 8.1-meter Gemini mirror, we found faint old stars, measured the distance to Pegasus V and determined that its stellar population is very old.
Emily Charles, study participant at the University of Surrey
The researchers believe that further study of the chemical properties of Pegasus V will help to understand how star formation took place in the early Universe, as well as clarify ideas about dark matter.
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