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Loops formed by tidal tails as fossil records of a major merger
Astronomy and Astrophysics
Many haloes of nearby disc galaxies contain faint and extended features, including loops, which are often interpreted as relics of satellite infall in the main galaxy's potential well. In most cases, however, the residual nucleus of the satellite is not seen, although it is predicted by numerical simulations. We test whether such faint and extended features can be associated to gas-rich, major mergers, which may also lead to disc rebuilding and thus be a corner stone for the formation of spiraldoi:10.1051/0004-6361/201117423 fatcat:sysg46gtijchtieom5jsfwafr4