Structure and mass distribution of spiral galaxies at intermediate redshifts

Details Structure and mass distribution of spiral galaxies at intermediate redshifts Structure and mass distribution of spiral galaxies at intermediate redshifts

2002-12-23

arxiv.org/abs/astro-ph/0212521v1

Astron.Astrophys.403:529-536,2003

Astronomy and Astrophysics

Astrophysics

9 pages, 9 eps figures, Astron. & Astrophys. submitted

Scientific paper

10.1051/0004-6361:20030327

Using the HST archive WFPC2 observations and rotation curves measeured by Vogt et al. (1996), we constructed self-consistent light and mass distribution models for three disk galaxies at redshifts z = 0.15, 0.90 and 0.99. The models consist of three components: the bulge, the disk and the dark matter. Spatial density distribution parameters for the components were calculated. After applying k-corrections, mass-to-light ratios for galactic disks within the maximum disk assumption are M/L_B = 4.4, 1.2 and 1.2, respectively. Corresponding central densities of dark matter halos within a truncated isothermal model are 0.0092, 0.028 and 0.015 in units M_sol/pc^3. The light distribution of galaxies in outer parts is steeper than a simple exponential disk.

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