Scale Length of Disk Galaxies

Details Scale Length of Disk Galaxies Scale Length of Disk Galaxies

2009-07-15

arxiv.org/abs/0907.2550v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Invited talk at the workshop "Multiwavelegth Astronomy and Virtual Observatory" at ESA/ESAC in december 2008

Scientific paper

As a part of a Euro-VO research initiative, we have undertaken a programme aimed at studying the scale length of 54909 Sa-Sd spiral galaxies from the SDSS DR6 catalogue. We have retrieved u,g,r,i,z-band images for all galaxies in order to derive the light profiles. We also calculate asymmetry parameters to select non-disturbed disks for which we will derive exponential disk scale lengths. As images in different bands probe different optical depths and stellar populations, it is likely that a derived scale length value should depend on waveband, and our goal is to use the scale length variations with band pass, inclination, galaxy type, redshift, and surface brightness, in order to better understand the nature of spiral galaxies.

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