Binary galaxy
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Two galaxies orbiting each other
A binary galaxy is a system of two interacting galaxies where their distance is 5-10 times less than the distance of the nearest galaxies of comparable brightness and dimension.[1] The orbital periods of theses galaxies are typically in the timescales of hundreds of millions of years.[2] The Milky Way galaxy and the nearest galaxy, Andromeda Galaxy may be classed as a binary galaxy.[3]
Binary galaxies, if spaced out a large distance, can be stable. However close pairs of galaxies can cause disruptions to their structures. They can also merge and become an interacting galaxy.[2]
These pairs of galaxies are useful in the field of astronomy to determine the mass of galaxies.[4]
References
[edit ]- ^ Karachentsev, I. D. (1979年11月01日). "Binary galaxies". Zemlya Vselennaya (in Russian) (6). ISSN 0044-3948.
- ^ a b "Binary galaxies: life together, not always harmonious..." (PDF). lilith.fisica.ufmg.br. Archived from the original (PDF) on 2024年03月19日. Retrieved 2025年04月23日.
- ^ "Binary galaxies". ned.ipac.caltech.edu. Retrieved 2025年04月23日.
- ^ "Modern Cosmological Observations and Problems - G. Bothun". ned.ipac.caltech.edu. Retrieved 2025年04月23日.
