Infall and starbursts in z [similar] 0.5 clusters

Details Infall and starbursts in z [similar] 0.5 clusters Infall and starbursts in z [similar] 0.5 clusters

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ogci.conf..341d&link_type=abstract

Outskirts of Galaxy Clusters: Intense Life in the Suburbs. Edited by Antonaldo Diaferio, IAU Colloquium #195, p.341-346

Computer Science

1

Scientific paper

In this paper I address three topics. The first regards the use of composite spectra as a tool to study the spectral evolution of galaxies in intermediate-redshift clusters. This technique is used to demonstrate the robustness of measurements of strong Hδ absorption, indicative of mild-to-moderate starbursts, in a significant fraction of galaxies in these clusters. Second, I present some spectroscopic data on Abell 851 (z=0.41) that suggests that the starbursts in this cluster have been triggered by tidal encounters in infalling groups in the cluster. Third, I briefly describe the IMACS imaging-spectrograph, which has been built for the Magellan-Baade telescope, and, following the idea that the outskirts of clusters are "where the action is," describe a large spectroscopic program to study "cluster building" using IMACS.

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