| Tidal Filaments |
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| • | Already
saw filaments, tidal “tails” as in the |
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| Antennae
system and the Mice. Tidal |
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| forces
strong distance dependence draws |
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| these
structures out. Duration is 1-2
Gyrs, |
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| and
are relics of an interaction that persist. |
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| • | Star-forming
knots can and do form in the |
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| filaments,
and can become dwarf galaxies in |
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| their
own right. |
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