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Techniques for quantifying the Star Formation Morphology of Galaxies at increasing redshift

Published online by Cambridge University Press:  01 December 2006

J. Ruyman Azzollini  and
J. E. Beckman
J. Ruyman Azzollini
Affiliation:
Instituto de Astrofisica de Canarias, C/Via Lactea s/n, La Laguna, 38200, S/C de Tenerife, Spain email: ruyman@iac.es
J. E. Beckman
Affiliation:
Instituto de Astrofisica de Canarias, C/Via Lactea s/n, La Laguna, 38200, S/C de Tenerife, Spain email: jeb@iac.esCentro Superior de Investigaciones Cientificas, Spain
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Abstract

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We present a brief, comparative, study of the morphology of a sample of 9 late type, star forming, local galaxies, as seen in different bands. The objects are present in the “The Hα Galaxy Survey” by James et al., 2004 (J04 hereafter), in the Sloan Digital Sky Survey (“SDSSS”, York et al., 2000), and also in data from GALEX (Martin et al. 2005). We tested the pixel to pixel proportionality v. Hα of images in broad bands from FUV to NIR. We also analyzed the differences in the radial profiles of light in different bands. Finally, we also measured several parameters of the morphology of the distributions of light, as detected in bands of SDSS (u,g,r,i,z), GALEX (NUV, FUV) and in R and Hα from J04, aiming to test which bands better mimic the spatial distribution of the SF as traced by Hα. Our goal is to acquire as accurate a determination as possible of the spatial distribution of the massive star formation in local galaxies, to compare with the analogous distribution in galaxies at increasing redshift.

Keywords

galaxies: stellar contentgalaxies: structuregalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 493 - 494
Copyright
Copyright © International Astronomical Union 2007

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