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Hickson 44, Compact Galaxy Group

Hickson 44, Compact Galaxy Group

C009/3690

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Credit

GERARD LODRIGUSS / SCIENCE PHOTO LIBRARY GERARD LODRIGUSS / SCIENCE PHOTO LIBRARY

Caption

Hickson 44 is a compact group of 4 galaxies located about in the constellation of Leo. They lie about 60 million light years away. Paul Hickson, in an article titled Compact Groups of Galaxies published in the Annual Review of Astronomy and Astrophysics in 1997, said: Most compact groups contain a high fraction of galaxies having morphological or kinematical peculiarities, nuclear radio and infrared emission, and starburst or active galactic nuclei (AGN) activity. They contain large quantities of diffuse gas and are dynamically dominated by dark matter. They most likely form as subsystems within looser associations and evolve by gravitational processes. Strong galaxy interactions result and merging is expected to lead to the ultimate demise of.

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