Refined position angle measurements for galaxies of the SDSS Stripe 82 co-added dataset

Refined position angle measurements for galaxies of the SDSS Stripe 82 co-added dataset

Position angle measurements of Sloan Digital Sky Survey (SDSS) galaxies, as measured by the surface brightness profile fitting code of the SDSS photometric pipeline (Lupton et al. 2001), are known to be strongly biased, especially in the case of almost face‐on and highly inclined galaxies. To addres...

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Veröffentlicht in:Astronomische Nachrichten 2013-11, Vol.334 (9), p.1016-1019
Hauptverfasser: Varga, J., Csabai, I., Dobos, L.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Astronomy
Catalogues
cosmology: large-scale structure
Fittings
Galaxies
galaxies: fundamental parameters
methods: data analysis
On-line systems
Photometry
Position measurement
Reproduction
Star maps
Stars & galaxies
techniques: image processing
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Zusammenfassung:Position angle measurements of Sloan Digital Sky Survey (SDSS) galaxies, as measured by the surface brightness profile fitting code of the SDSS photometric pipeline (Lupton et al. 2001), are known to be strongly biased, especially in the case of almost face‐on and highly inclined galaxies. To address this issue we developed a reliable algorithm which determines position angles by means of isophote fitting. In this paper we present our algorithm and a catalogue of position angles for 26397 SDSS galaxies taken from the deep co‐added Stripe 82 (equatorial stripe) images. Data are published on‐line at http://www.vo.elte.hu/galmorph. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201211984