Issue |
A&A
Volume 427, Number 1, November III 2004
|
|
---|---|---|
Page(s) | 95 - 100 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20041025 | |
Published online | 25 October 2004 |
Quantitative interpretation of the rotation curves of spiral galaxies at redshifts z ~ 0.7 and z ~ 1
1
Astronomisches Rechen-Institut, Mönchhofstraße 12-14, 69120 Heidelberg, Germany e-mail: fuchs@ari.uni-heidelberg.de
2
Universitätssternwarte Göttingen, Geismarlandstraße 11, 37083 Göttingen, Germany
3
Landessternwarte Heidelberg, Königstuhl, 69117 Heidelberg, Germany
Received:
5
April
2004
Accepted:
17
July
2004
We present decompositions of the rotation curves of three spiral galaxies at
redshifts 0.7 and 1 into contributions by their bulges, disks, and
dark halos, respectively. In order to set constraints on the degeneracy of
the decompositions 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, have very likely “maximum disks”, i.e. are
dominated in their inner parts by baryonic matter. We argue that current
theories of the cosmogony of galaxies must allow for these types of galaxies.
Key words: galaxies: spiral / galaxies: kinematics and dynamics
© ESO, 2004
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