2003A&A...403..529T


Query : 2003A&A...403..529T

2003A&A...403..529T - Astronomy and Astrophysics, volume 403, 529-536 (2003/5-4)

Structure and mass distribution of spiral galaxies at intermediate redshifts.

TAMM A. and TENJES P.

Abstract (from CDS):

Using the HST archive WFPC2 observations and rotation curves measured by Vogt et al. (1996ApJ...465L..15V), 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. The light distribution of the galaxies in the outer parts is steeper than a simple exponential disk. 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/LB=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/pc3. In addition, we constructed mass distribution models without a dark matter component. Due to the limited extent of rotational curves the models without a dark halo fit equally well with observations. In this case mass-to-light ratios for galactic disks are 5.5, 3.3 and 2.1, respectively.

Abstract Copyright:

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

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 EGSIRAC J141731.31+522609.6 G 14 17 31.31781 +52 26 09.6061   24.06   22.79 21.72 ~ 11 0
2 EGSIRAC J141745.03+522803.0 Sy2 14 17 44.99 +52 28 03.0   20.003   18.714 18.199 ~ 25 1
3 DEEP-GSS 064-4412 G 14 17 53.414 +52 29 41.07           ~ 9 0

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2022.08.19-04:33:17

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