A brand new fossil galaxy, which was uncovered by way of a scientific visible search of legacy survey pictures utilizing the Mayall 4-meter telescope, led by Dr. David Martinez Delgado, could educate scientists about how galaxies kind and make sure their understanding of cosmology and darkish matter.
Dr. Michelle Collins, an astronomer at the University of Surrey, UK and lead creator of the paper asserting this discovery says that they “have found a new, extremely faint galaxy whose stars formed very early in the history of the Universe. This discovery marks the first time a galaxy this faint has been found around Andromeda using an astronomical survey that wasn’t specifically designed for the task.”
Named “Pegasus V,” the dwarf galaxy is situated on the outskirts of Andromeda and seems as only a few sparse stars hidden in the sky.
The discovery was made in collaboration with NSF NOIRLab and the International Gemini Observatory.
Emily Charles, a Ph.D. pupil at the University of Surrey who was additionally concerned in the examine says that “the trouble with these extremely faint galaxies is that they have very few of the bright stars which we typically use to identify them and measure their distances. Gemini’s large 8.1-meter mirror allowed us to find faint, old stars which enabled and allowed us to both to measure the distance to Pegasus V and to determine that its stellar population is extremely old.”
More astronomical amenities are wanting into researching faint galaxies in the close to future.
The discovery was reported in Monthly Notices of the Royal Astronomical Society.
Astronomers uncover a brand new ultra-faint dwarf galaxy
Michelle Collins et al, Pegasus V—a newly found ultra-faint dwarf galaxy on the outskirts of Andromeda, Monthly Notices of the Royal Astronomical Society (2022). DOI: 10.48550/arXiv.2204.09068
University of Surrey
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