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Velocity Fields of Spiral Galaxies in z∼0.5 Clusters

Published online by Cambridge University Press:  01 December 2006

Elif Kutdemir ,
Bodo Ziegler  and
Reynier F. Peletier
Elif Kutdemir
Affiliation:
Georg-August-Universität, Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany email: [email protected] Kapteyn Astronomical Institute, P.O. BOX 800, 9700AV, Groningen, The Netherlands
Bodo Ziegler
Affiliation:
Georg-August-Universität, Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany email: [email protected]
Reynier F. Peletier
Affiliation:
Kapteyn Astronomical Institute, P.O. BOX 800, 9700AV, Groningen, The Netherlands
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Abstract

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Spiral galaxies can be affected by interactions in clusters, that also may distort the internal velocity field. If unrecognized from single-slit spectroscopy, this could lead to a wrong determination of the maximum rotation velocity as pointed out by Ziegler et al. 2003. This parameter directly enters into the Tully--Fisher relation, an important tool to investigate the evolution of spiral galaxies. To overcome this problem, we measure the 2D-velocity fields by observing three different slit positions per galaxy using FORS2 at the VLT providing us with full coverage of each galaxy and an adequate spatial resolution. The kinematic properties are compared to structural features determined on the HST/ACS images to assess possible interaction processes. As a next step, the whole analysis will be performed for three more clusters, so that we will be able to establish a high-accuracy TFR for spirals at z∼0.5.

Keywords

galaxies: kinematics and dynamicsgalaxies: spiralgalaxies: clusters: individual (MS 0451.6-0305)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 569 - 570
Copyright
Copyright © International Astronomical Union 2007

References

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