NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-02-22 T09:35:30 PST
Help | Comment | NED Home

For refcode 2016A&A...591A..38C:
Retrieve 5802 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2016A&A...591A..38C Robust automatic photometry of local galaxies from SDSS. Dissecting the color magnitude relation with color profiles Consolandi, Guido; Gavazzi, Giuseppe; Fumagalli, Michele; Dotti, Massimo; Fossati, Matteo Abstract. We present an automatic procedure to perform reliable photometry of galaxies on SDSS images. We selected a sample of 5853 galaxies in the Coma and Virgo superclusters. For each galaxy, we derive Petrosian g and i magnitudes, surface brightness and color profiles. Unlike the SDSS pipeline, our procedure is not affected by the well known shredding problem and efficiently extracts Petrosian magnitudes for all galaxies. Hence we derived magnitudes even from the population of galaxies missed by the SDSS which represents ~25% of all local supercluster galaxies and ~95% of galaxies with g < 11 mag. After correcting the g and i magnitudes for Galactic and internal extinction, the blue and red sequences in the color magnitude diagram are well separated, with similar slopes. In addition, we study (i) the color-magnitude diagrams in different galaxy regions, the inner (r <= 1 kpc), intermediate (0.2R_Pet_ <= r <= 0.3R_Pet_) and outer, disk-dominated (r >= 0.35R_Pet_)) zone; and (II), we compute template color profiles, discussing the dependences of the templates on the galaxy masses and on their morphological type. The two analyses consistently lead to a picture where elliptical galaxies show no color gradients, irrespective of their masses. Spirals, instead, display a steeper gradient in their color profiles with increasing mass, which is consistent with the growing relevance of a bulge and/or a bar component above 10^10^ M_sun_. Full Table A.1 is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/591/A38 Key words: galaxies: evolution, galaxies: fundamental parameters, galaxies: star formation, galaxies: photometry
Retrieve 5802 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home