VizieR Online Data Catalog: Study of spiral structure in galaxies (Savchenko+, 2020)
Abstract
In this paper, we used SDSS gri-band images to perform a detailed analysis of the spiral structure in the 155 face-on non-interacting spiral galaxies. Our sample is mostly composed of multi-armed and grand design galaxies, with a fraction of flocculent galaxies, in which at least one arm could be visually traced.
In our study, we used an approach of fitting an arm profile by creating a series of photometric cuts perpendicular to its direction. For tracing the spiral structure, we start from the inner galaxy region to the outermost regions to which we are able to trace the spirals. Along with the pitch angle and its variation with radius, we measured, for the first time based on the spiral view in the optical, the arm width and its variation with Galactocentric distance, the fraction of the spiral structure to the total galaxy luminosity, and its colour. Coupling with the arm number and the general arm class (grand design, flocculent, or multi-armed), these quantities define the photometric properties of the spiral structure in galaxies, which can in principle be used to distinguish between different mechanisms of generating spiral structure in galaxies. (2 data files).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- March 2023
- Bibcode:
- 2023yCat..74930390S
- Keywords:
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- Galaxies: photometry;
- Galaxy catalogs;
- Optical