Bibcode
Fernández Lorenzo, M.; Cepa, J.; Bongiovanni, A.; Castañeda, H.; Pérez García, A. M.; López, M. A. Lara; Pović, M.; Sánchez Portal, M.
Bibliographical reference
Highlights of Spanish Astrophysics V, Astrophysics and Space Science Proceedings. ISBN 978-3-642-11249-2. Springer-Verlag Berlin Heidelberg, 2010, p. 291
Advertised on:
0
2010
Citations
0
Refereed citations
0
Description
The study of the evolution of the Tully-Fisher relation has raised some
problems during the last years. The main difficulty is determining the
required parameters of intermediate redshift galaxies. In the present
work, the rotational velocities obtained from the widths of different
optical lines using DEEP2 spectra are compared. The apparent magnitudes
are K and extinction corrected, and the absolute magnitudes are derived
using the concordance cosmological model. Finally the B, R, and I-band
Tully-Fisher relation up to z = 1. 3 is derived. Although most studies
(this included) find evidences for evolution, the results are not
conclusive enough, given that the possible luminosity evolution is
within the scattering of the relation and the evolution in slope is
difficult to determine because at high redshift only the brightest
galaxies can be measured. Nevertheless, this study shows a clear
tendency, that is the same for all bands, favouring a luminosity
evolution where galaxies were brighter in the past for a fixed rotation
velocity.