Morphology Segregation of Galaxies in Color-Color Gradient Space

By Changbom Park, Yun-Young Choi. 2005

143 citations recorded by the source corpus.

We have found the u - r color versus g - i color gradient space can be used for highly successful morphology classification of galaxies in the Sloan Digital Sky Survey. In this space, galaxies form well-separated early- and late-type branches. The location of galaxies along the branches reflects the degree and locality of star formation activity, and monotonically corresponds to the sequence of morphological subclasses. When the concentration index is also used, the completeness and reliability of classification reaches about 91% for a training set of SDSS galaxies brighter than rpet ≈ 15.9. At the faintest magnitudes (rpet ≈ 17.5) of the SDSS spectroscopic sample, the accuracy still remains at about 88%. The new classification scheme will help us find accurate relations of galaxy morphology with spatial and temporal environments, and help us to understand the origin of morphology of galaxies.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/26c84484ab2ab6b76ee27a201c0b8dafd85c7011

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Citations in the corpus

Internal and Collective Properties of Galaxies in the Sloan Digital Sky Survey (2006, methodology): “1 of Park & Choi 2005).”
The shapes of galaxies in the Sloan Digital Sky Survey (2008, methodology): “Park & Choi (2005) presented a very accurate way to determine SDSS galaxy morphologies using colour gradients that could be used to separate the DR6 catalogue into spiral and elliptical galaxies, but this would require analysing the images of each individual galaxy separately.”
A Galaxy Photometric Redshift Catalog for the Sloan Digital Sky Survey Data Release 6 (2007, methodology): “…with quasiexponential light profiles, typically have higher values of c. Previous studies (Morgan 1958; Shimasaku et al. 2001; Yamauchi et al. 2005; Park & Choi 2005) have shown that the concentration parameter correlates well with galaxy morphological type, and we used it to help break the…”
The importance of satellite quenching for the build-up of the red sequence of present-day galaxies (2007, background): “Since most red-sequence galaxies are spheroids, while most blue-sequence galaxies are discs (e.g. Park & Choi 2005; see also Fig.”
Environmental Dependence of Properties of Galaxies in the Sloan Digital Sky Survey (2006, methodology): “We classify morphological types of galaxies using the prescription of Park & Choi (2005).”
THE ARECIBO LEGACY FAST ALFA SURVEY: THE GALAXY POPULATION DETECTED BY ALFALFA (2012, background): “To minimize errors due to internal extinction, they trim the sample to leave only spiral galaxies (Park & Choi 2005) havingb/a > 0.6.”