Velocity fields of distant galaxies with FORS2 at the VLT
Bodo L. Ziegler (1), Elif Kutdemir (2), Cristiano Da Rocha (1), Asmus, B\"ohm (3), Wolfgang Kapferer (3), Harald Kuntschner (1), Reynier F. Peletier, (2), Sabine Schindler (3), Miguel Verdugo (4) ((1) ESO, (2) Groningen (3), Innsbruck (4) G\"ottingen)
TL;DR
This paper presents a method using FORS2 at the VLT to efficiently map the velocity fields of distant faint galaxies, aiding in the study of their kinematic structures and interaction signatures.
Contribution
The paper introduces a novel observational technique for two-dimensional velocity mapping of distant galaxies with FORS2 at the VLT, enabling detailed kinematic analysis.
Findings
Significant fraction of galaxies show irregular velocity fields
Method can detect signatures of tidal interactions and ram-pressure effects
Applicable to both field and cluster galaxy environments
Abstract
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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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Astrophysics and Star Formation Studies