Volume 399, Number 3, March I 2003
|Page(s)||879 - 887|
|Published online||14 February 2003|
On the global structure of distant galactic disks*
Astronomical Institute of St. Petersburg State University, 198504 St. Petersburg, Russia
2 Astronomisches Institut der Ruhr-Universität Bochum, Universitätsstr. 150 NA7, 44780 Bochum, Germany
3 Isaac Newton Institute of Chile, St. Petersburg Branch, Russia
4 Astronomical Institute of St. Petersburg State University, 198504 St. Petersburg, Russia Astronomisches Institut der Ruhr-Universität Bochum, Universitätsstr. 150 NA7, 44780 Bochum, Germany Isaac Newton Institute of Chile, St. Petersburg Branch, Russia LERMA, Observatoire de Paris, 61 Av. de l'Observatoire, 75014 Paris, France
Corresponding author: V. P. Reshetnikov, email@example.com
Accepted: 3 December 2002
Radial and vertical profiles are determined for a sample of 34 edge-on disk galaxies in the HDFs, selected for their apparent diameter larger than 1.3´´ and their unperturbed morphology. The thickness and flatness of their galactic disks are determined and discussed with regard to evolution with redshift. We find that sub-L* spiral galaxies with have a relative thickness or flatness (characterized by hz/h the scaleheight to scalelength ratio) globally similar to those in the local Universe. A slight trend is however apparent, with the hz/h flatness ratio larger by a factor of ~1.5 in distant galaxies if compared to local samples. In absolute value, the disks are smaller than in present-day galaxies. About half of the spiral disks show a non-exponential surface brightness distribution.
Key words: galaxies: evolution / galaxies: high-redshift / galaxies: structure
© ESO, 2003
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