Imprints of gas accretion in multi-spin galaxies Lodovico Coccato1

Imprints of gas accretion in multi-spin galaxies
Lodovico Coccato1, Lorenzo Morelli2,3, Enrico Maria Corsini2,3, Alessandro
Pizzella2,3, Elena Dalla Bontà2,3
1
European Southern Observatory, Garching b. Muenchen, Germany
2
Dipartimento di Fisica e Astronomia “G. Galilei”, Università si Padova, Italy
3
INAF, Osservatorio Astronomico di Padova, Italy
Multiple events in a galaxy lifetime, such as the accretion of gas or stars via mergers or
interactions in general, can not only shape its morphology, but they can also leave
strong signatures in its kinematics and stellar populations. This is the case of multi-spin
galaxies, which are characterized by multiple kinematic components of different angular
momenta (from orthogonal disks, warped structures, and counter-rotating components)
and stellar population content. The key to understand the formation scenarios of multispin galaxies is to investigate the properties of their multiple components, by separating
their contribution to the main galaxy and study them separately. I will discuss the
importance of gas accretion in shaping multi-spin galaxies and the techniques aimed at
disentangling their multiple components.

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