Velocity fields of distant galaxies with FORS2 at the VLT

Details Velocity fields of distant galaxies with FORS2 at the VLT Velocity fields of distant galaxies with FORS2 at the VLT

2009-07-30

arxiv.org/abs/0907.5301v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

To appear in ESO Messenger, issue September 2009

Scientific paper

We describe a method to efficiently obtain two-dimensional velocity fields of distant, faint and small, emission-line galaxies with FORS2 at the VLT. They are examined for kinematic substructure to identify possible interaction processes. Numerical simulations of tidal interactions and ram-pressure effects reveal distinct signatures observable with our method. We detect a significant fraction of galaxies with irregular velocity fields both in the field and cluster environments.

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