EDP Sciences
Free access
Volume 415, Number 3, March I 2004
Page(s) 849 - 861
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20034186

A&A 415, 849-861 (2004)
DOI: 10.1051/0004-6361:20034186

Deprojecting spiral galaxies using Fourier analysis. Application to the Frei sample

C. Barberà1, E. Athanassoula2 and C. García-Gómez1

1  D.E.I.M., Campus Sescelades, Avd. dels Països Catalans 26, 43007 Tarragona, Spain
2  Observatoire de Marseille, 2 Place Le Verier, 13248 Marseille cedex 04, France

(Received 12 August 2003 / Accepted 30 September 2003)

We present two methods that can be used to deproject spirals, based on Fourier analysis of their images, and discuss their potential and restrictions. Our methods perform particularly well for galaxies more inclined than $50^{\circ}$ or for non-barred galaxies more inclined than $35^{\circ}$. They are fast and straightforward to use, and thus ideal for large samples of galaxies. Moreover, they are very robust for low resolutions and thus are appropriate for samples of cosmological interest. The relevant software is available from us upon request. We use these methods to determine the values of the position and inclination angles for a sample of 79 spiral galaxies contained in the Frei et al. (1996) sample. We compare our results with the values found in the literature, based on other methods. We find statistically very good agreement

Key words: galaxies: structure -- galaxies: spiral

Offprint request: C. Barberà, cbarbera@etse.urv.es

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