Quantifying the poor purity and completeness of morphological samples selected by galaxy colour
Quantifying the poor purity and completeness of morphological samples selected by galaxy colour
The galaxy population is strongly bimodal in both colour and morphology, and the two measures correlate strongly, with most blue galaxies being late-types (spirals) and most early-types, typically ellipticals, being red. This observation has led to the use of colour as a convenient selection criteria to make samples which are …