SIMBAD references

2005A&A...433...31T - Astronomy and Astrophysics, volume 433, 31-41 (2005/4-1)

Structure of visible and dark matter components in spiral galaxies at redshifts z = 0.5-0.9.

TAMM A. and TENJES P.

Abstract (from CDS):

We have constructed self-consistent light and mass distribution models for four disk galaxies at redshifts z=0.48, 0.58, 0.81 and 0.88, using the HST archive WFPC2 observations (HDF-S, MDS, Groth Strip survey) and rotation curves measured by Vogt et al. (1996ApJ...465L..15V) and Rigopoulou et al. (2002ApJ...580..789R). The models consist of three components: a bulge, a disk and a dark matter halo. Similarly to the sample studied in Paper I (Tamm & Tenjes, 2003A&A...403..529T), light distribution of the galaxies in the outer parts is clearly steeper than a simple exponential disk. After applying k-corrections, calculated mass-to-light ratios for galactic disks within the maximum disk assumption are M/LB=0.9, 7.4, 4.3 and 1.4, respectively. Together with the galaxies from Paper I, the mean <M/LB≥2.5 at <z≥∼0.9, indicating no significant evolution of M/LB with redshift. Central densities of dark matter halos for an isothermal model are 0.008, 0.035, 0.013, and 0.022 in units M/pc3, respectively. Together with the galaxies from Paper I, the DM central density of the four galaxies at mean readshift <z≥∼0.9 is ρ(0)=(0.012-0.028) M/pc3, also showing no significant evolution with redshift. We have also constructed mass distribution models without assuming flat rotation curves and without a dark matter component. Due to the limited extent of the observed rotation, the models without a dark halo nearly fit the observations. In this case, mass-to-light ratios for the galactic disks are 1.8, 9.7, 12. and 1.9, respectively.

Abstract Copyright:

Journal keyword(s): galaxies: photometry - galaxies: fundamental parameters - galaxies: high-redshift - galaxies: spiral - galaxies: structure - dark matter

CDS comments: p.31 HDS-S is a probable misprint for HDF-S. Table 1 GSS = DEEP-GSS, MD S uem0.043 = [AVG96] uem0- 43, HDFS J223247.66-603335.9 = [EAD2001] HDFS J223247.66-603335.9

Simbad objects: 6

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2005A&A...433...31T and select 'bookmark this link' or equivalent in the popup menu