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Evolution of the Colour--Radius Relation and the Morphology--Radius Relation in the SDSS Galaxy Clusters
Tomotsugu Goto, Masafumi Yagi, Masayuki Tanaka +1
We have investigated the redshift evolution of the colour--cluster-centric-radius relation and the morphology--cluster-centric-radius relation in three redshift bins, $0.02\leq z\l…
Hdelta-Selected Galaxies in the Sloan Digital Sky Survey I: The Catalog
Tomotsugu Goto, Robert C. Nichol, Christopher J. Miller +20
[Abridged] We present here a new and homogeneous sample of 3340 galaxies selected from the Sloan Digital Sky Survey (SDSS) based solely on the observed strength of their Hdelta abs…
The Environment of Passive Spiral Galaxies in the SDSS
Tomotsugu Goto, Sadanori Okamura, Maki Sekiguchi +15
In previous work on galaxy clusters, several authors reported a discovery of an unusual population of galaxies, which have spiral morphologies, but do not show any star formation a…
The Morphological Butcher-Oemler effect in the SDSS Cut&Enhance Galaxy Cluster Catalog
Tomotsugu Goto, Sadanori Okamura, Masafumi Yagi +14
We investigate the evolution of the fractions of late type cluster galaxies as a function of redshift, using one of the largest, most uniform cluster samples available. The sample…