Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1323b&link_type=abstract
American Astronomical Society, AAS Meeting #211, #13.23; Bulletin of the American Astronomical Society, Vol. 39, p.758
Astronomy and Astrophysics
Astronomy
Scientific paper
The thickness of stellar disks can be used as an indicator of halo-to-disk mass ratio in spiral galaxies. Multi-color images of thousands of edge-on galaxies obtained by the Sloan Digital Sky Survey (SDSS) can be used to estimate the stellar disk thickness. We analyze the structure of a large sample (4990 images in five photometric bands) of bulgeless spiral galaxies selected from the Revised Flat Galaxies Catalog and obtain the vertical and radial scales and central surface brightness of their stellar disks. Our data are in agreement with previously found relation between the relative disk thickness and its central surface brightness. We also model the apparent brightness distribution in most of our edge-on galaxies taking into account embedded dust disks. Simple relations between the surface
brightness, photometric scales, and relative mass of dark halo in disky galaxies can be applied to trace the dark matter content in galaxy groups and clusters up to z 0.05 using SDSS data.
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