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New Dwarf Galaxy Discovered: dE01+09 Reveals Cosmic Mystery

9/5/2025

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Summary

Story summary

Astronomers at Yonsei University discovered a new isolated early-type dwarf galaxy, dE01+09.
Published on August 28, the finding appears on the arXiv preprint server.
Located 3.9 million light years from NGC 524, dE01+09 has a radius of 3,900 light years.
With a mass of 280 million solar masses, it is estimated to be 8.3 billion years old.
Researchers believe it was ejected from NGC 524 due to environmental quenching.

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Story summary

Astronomers at Yonsei University discovered a new isolated early-type dwarf galaxy, dE01+09.
Published on August 28, the finding appears on the arXiv preprint server.
Located 3.9 million light years from NGC 524, dE01+09 has a radius of 3,900 light years.
With a mass of 280 million solar masses, it is estimated to be 8.3 billion years old.
Researchers believe it was ejected from NGC 524 due to environmental quenching.