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