2007MNRAS.375..913P

Query : 2007MNRAS.375..913P

2007MNRAS.375..913P - Mon. Not. R. Astron. Soc., 375, 913-924 (2007/March-1)

The Tully-Fisher relation and its evolution with redshift in cosmological simulations of disc galaxy formation.

PORTINARI L. and SOMMER-LARSEN J.

Abstract (from CDS):

We present predictions on the evolution of the Tully-Fisher (TF) relation with redshift, based on cosmological N-body/hydrodynamical simulations of disc galaxy formation and evolution. The simulations invoke star formation and stellar feedback, chemical evolution with non-instantaneous recycling, metallicity-dependent radiative cooling and effects of a metagalactic ultraviolet field, including simplified radiative transfer. At z = 0, the simulated and empirical TF relations are offset by about 0.4 mag (1σ) in the B and I bands. The origin of these offsets is somewhat unclear, but it may not necessarily be a problem of the simulations only.

As to evolution, we find a brightening of the TF relation between z = 0 and 1 of about 0.85 mag in rest-frame B band, with a non-evolving slope. The brightening we predict is intermediate between the (still quite discrepant) observational estimates.

This evolution is primarily a luminosity effect, while the stellar mass TF relation shows negligible evolution. The individual galaxies do gain stellar mass between z = 1 and 0, by a 50-100 per cent, but they also correspondingly increase their characteristic circular speed. As a consequence, individually they mainly evolve along the stellar mass TF relation, while the relation as such does not show any significant evolution.


Abstract Copyright: 2007 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): methods: {em N}-body simulations - galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: spiral - dark matter

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 424 1

Query : 2007MNRAS.375..913P

Basic data :
NAME Ursa Major Cluster -- Cluster of Galaxies
Other object types: otypes_help 		ClG (), GrG (NBGG)
ICRS coord. (ep=J2000) : 		15 08 48.0 +67 07 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		15 08 10.8 +67 18 22 [ ]
Gal coord. (ep=J2000) : 		104.8926 +44.8985 [ ]
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NAME Ursa Major Cluster NAME UMa Cluster NAME UMa ClG NBGG 12-01

References (424 between 1850 and 2026) (Total 424)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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