Astron. Astrophys. 336, 878-882 (1998)

Decomposition of the rotation curves of distant field galaxies

B. Fuchs ¹, C. Möllenhoff ² and J. Heidt <sup>2

1</sup> Astronomisches Rechen-Institut Heidelberg, Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
² Landessternwarte, Königstuhl, D-69117 Heidelberg, Germany

Received 14 November 1997 / Accepted 4 April 1998

Abstract

We present decompositions of the rotation curves of distant spiral galaxies into contributions due to their bulges, disks, and putative dark haloes. In order to set constraints on the ambiguities of the decompositons we interpret the morphology of the spiral structures quantitatively in the framework of density wave theory. Galaxy models constrained in such a way show that the distant galaxies, which are much younger than nearby galaxies, are indeed also imbedded in dark haloes as expected from contemporary theories of the cosmogony of galaxies.

Key words: galaxies: individual: VFP J0305-00115; VFP J064-4442; VFP J074-2237 galaxies: kinematics and dynamics dark matter

Send offprint requests to: B. Fuchs

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Contents

• 1. Introduction
• 2. Bulge - disk decompositions
• 3. Decomposition of the rotation curves
• 4. Discussion and conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 1998

Online publication: July 27, 1998
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