The Evolution of the Tully-Fisher Relation between z similar to 2.3 and z similar to 0.9 with KMOS3D

Ubler, H.; Schreiber, N. M. Förster; Genzel, R.; Wisnioski, E.; Wuyts, S.; Lang, P.; Naab, T.; Burkert, A.; Dokkum, P. G. van; Tacconi, L. J.; Wilman, D. J.; Fossati, M.; Mendel, J. T.; Beifiori, A.; Belli, S.; Bender, R.; Brammer, G. B.; Chan, J.; Davies, R.; Fabricius, M.; Galametz, A.; Lutz, D.; Momcheva, I. G.; Nelson, E. J.; Saglia, R. P.; Seitz, S. und Tadaki, K. (2017): The Evolution of the Tully-Fisher Relation between z similar to 2.3 and z similar to 0.9 with KMOS3D. In: Astrophysical Journal, Bd. 842, Nr. 2, 121

Abstract

We investigate the stellar mass and baryonic mass Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z similar to 2.3 and z similar to 0.9 as part of the KMOS3D integral field spectroscopy survey. Our spatially resolved data allow reliable modeling of individual galaxies, including the effect of pressure support on the inferred gravitational potential. At fixed circular velocity, we find higher baryonic masses and similar stellar masses at z similar to 2.3 as compared to z similar to 0.9. Together with the decreasing gas-to-stellar mass ratios with decreasing redshift, this implies that the contribution of dark matter to the dynamical mass on the. galaxy scale increases toward lower redshift. A comparison to local relations reveals a negative evolution of the stellar and baryonic TFR zero points from z = 0 to z similar to 0.9, no evolution of the stellar TFR zero point from z similar to 0.9 to z similar to 2.3, and. a positive evolution of the baryonic TFR zero point from z similar to 0.9 to z similar to 2.3. We discuss a toy model of disk galaxy evolution to explain the observed. nonmonotonic TFR evolution, taking into account the empirically motivated redshift dependencies of galactic gas fractions and the relative amount of baryons to dark matter on galaxy and halo scales.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0004-637X
• Sprache: Englisch