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The formation of compact groups of galaxies

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Abstract

In the compact group of galaxies the galaxies can merge into a few massive ones in a very short time, so they must be formed very recently. On the other hand, according to the theory of structure formation, the denser system should form earlier. By analyzing the apparent paradox, we suggest that the merging process of CDM halo plays an important role in the formation of the compact groups of galaxies: it delays the formation of compact groups of galaxies, and makes the pups of galaxies much denser.

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Authors and Affiliations

  1. National Astronomical Observatory, Chinese Academy of Sciences, 100012, Beijing, China

    Er Ma

  2. Beijing Astrophysics Center, Chinese Academy of Sciences and Peking University, 100871, Beijing, China

    Er Ma & Yunqiang Yu

  3. Physics Department, Peking University, 100871, Beijing, China

    Yunqiang Yu

Authors
  1. Er Ma
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  2. Yunqiang Yu
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Project partially supporter1 hy the Ministry of Science and Technology (of China).

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Ma, E., Yu, Y. The formation of compact groups of galaxies. Sci. China Ser. A-Math. 42, 1089–1095 (1999). https://doi.org/10.1007/BF02889511

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  • DOI: https://doi.org/10.1007/BF02889511

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