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The environments of starburst and post-starburst galaxies at z=0.4-0.8
Bianca M. Poggianti, Alfonso Aragon-Salamanca, Dennis Zaritsky +16
Post-starburst (E+A or k+a) spectra, characterized by their exceptionally strong Balmer lines in absorption and the lack of emission lines, belong to galaxies in which the star for…
Forming Early-type Galaxies in Groups Prior to Cluster Assembly
Stefan J. Kautsch, Anthony H. Gonzalez, Christian A. Soto +3
We study a unique proto-cluster of galaxies, the supergroup SG1120-1202. We quantify the degree to which morphological transformation of cluster galaxies occurs prior to cluster as…
The Late Stellar Assembly of Massive Cluster Galaxies Via Major Merging
Kim-Vy H. Tran, John Moustakas, Anthony H. Gonzalez +3
We present multi-wavelength observations of the brightest galaxies in four X-ray luminous groups at z~0.37 that will merge to form a cluster comparable in mass to Coma. Ordered by…
The relation between star formation, morphology and local density in high redshift clusters and groups
Bianca M. Poggianti, Vandana Desai, Rose Finn +17
We investigate how the [OII] properties and the morphologies of galaxies in clusters and groups at z=0.4-0.8 depend on projected local galaxy density, and compare with the field at…
Mass and Redshift Dependence of Star Formation in Relaxed Galaxy Clusters
Rose A. Finn, Michael L. Balogh, Dennis Zaritsky +2
We investigate the star-formation properties of dynamically relaxed galaxy clusters as a function of cluster mass for 308 low-redshift clusters drawn from the Sloan Digital Sky Sur…
Spectroscopy of clusters in the ESO distant cluster survey (EDisCS).II. Redshifts, velocity dispersions, and substructure for clusters in the last 15 fields
Bo Milvang-Jensen, Stefan Noll, Claire Halliday +17
AIMS. We present spectroscopic observations of galaxies in 15 survey fields as part of the ESO Distant Cluster Survey (EDisCS). We determine the redshifts and velocity dispersions…