The second u-band extension of the WINGS cluster survey
Abstract
Context. This is the second u-band extension of the WIde-field Nearby Galaxy-cluster Survey (WINGS) whereby 39 clusters were imaged with the ESO-VLT survey telescope. This follows the first part of the survey which was performed with several telescopes of the northern hemisphere in the U Cousin-Bessel filter band covering 17 clusters.
Aims: The u-band data, in combination with those already collected by the WINGS survey, permit a detailed multi-wavelength investigation of the properties of the member galaxies from the cluster center out to the periphery.
Methods: We used SExtractor to derive the main properties of the galaxies in the observed fields and measure the u - V colors on circular apertures of increasing radius. The photometric accuracy of the magnitudes was calibrated with the standard stars and was tested by means of comparisons with the u-band data of the Sloan Digital Sky Survey (SDSS).
Results: We present the catalogs of the photometric analysis performed by SExtractor. We also provide a brief analysis of the u - V versus V color-magnitude diagram of our clusters, the plots of the color as a function of the cluster-centric distance (for cluster members only), the mass-color relation and the correlation of the current star formation rate (SFR) with the absolute V and u magnitudes for the galaxies in the observed fields.
- Publication:
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Astronomy and Astrophysics
- Pub Date:
- May 2020
- DOI:
- 10.1051/0004-6361/202037823
- Bibcode:
- 2020A&A...637A..54D
- Keywords:
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- galaxies: clusters: general;
- galaxies: photometry;
- galaxies: evolution