Gemini North telescope reveals a relict of the earliest galaxies. A unique ultra-faint dwarf galaxy has been discovered on the outer fringes of the Andromeda Galaxy thanks to the discerning eyes of an amateur astronomer examining archival data processed by NSF’s NOIRLab’s Community Science and Dat
An amateur astronomer’s keen eyes led to the discovery of an unusual ultra-faint dwarf galaxy on the outskirts of the Andromeda Galaxy. Credit: International Gemini Observatory/NOIRLab/NSF/AURA, Acknowledgment: Image processing: T.A. Rector , M. Zamani & D.
Faint stars in Pegasus V were revealed in follow-up deeper observations by astronomers using the larger, 8.1-meter Gemini North telescope with the GMOS instrument, confirming that it is an ultra-faint dwarf galaxy on the outskirts of the Andromeda Galaxy. Gemini North in Hawai‘i is one-half of the International Gemini Observatory.
A unique ultra-faint dwarf galaxy has been discovered in the outer fringes of the Andromeda Galaxy thanks to the sharp eyes of an amateur astronomer examining archival data from the US Department of Energy-fabricated Dark Energy Camera on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory and processed by the Community Science and Data Center .
The strong concentration of old stars that the team found in Pegasus V suggests that the object is likely a fossil of the first galaxies. When compared with the other faint galaxies around Andromeda, Pegasus V seems uniquely old and metal-poor, indicating that its star formation ceased very early indeed.
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