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The build-up of the colour-magnitude relation in galaxy clusters since z~0.8
Gabriella De Lucia, Bianca M. Poggianti, Alfonso Aragon-Salamanca +11
Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z~0.8. While red-sequence…
A direct empirical proof of the existence of dark matter
Douglas Clowe, Marusa Bradac, Anthony H. Gonzalez +4
We present new weak lensing observations of 1E0657-558 (z=0.296), a unique cluster merger, that enable a direct detection of dark matter, independent of assumptions regarding the n…
E+A Galaxies with Blue Cores: Active Galaxies in Transition
Yujin Yang, Christy Tremonti, Ann Zabludoff +1
HST ACS images reveal blue cores in four E+A, or post-starburst, galaxies. Follow-up spectroscopy shows that these cores have LINER spectra. The existence of LINERs, consistent wit…
Spectroscopic Survey of Red Giants in the SMC. I: Kinematics
Jason Harris, Dennis Zaritsky
We present a spectroscopic survey of 2046 red giant stars, distributed over the central 4x2 kpc of the Small Magellanic Cloud (SMC). After fitting and removing a small velocity gra…