NOAO >   Observing Info >   Approved Programs >   2015B-0808

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Program Information for 2015B-0808


PI: Jay Gallagher, U. of Wisconsin, Madison, jsg@astro.wisc.edu
Address: Astronomy Department, 475 N. Charter St., Madison, WI 53706 USA

CoI: Thorsten Lisker, Heidelberg University
CoI: Carolin Wittmann, Zentrum fur Astronomie der Universitat Heidelberg
CoI: Christopher Conselice, University of Nottingham
CoI: Eric J Hooper, U. of Wisconsin, Madison
CoI: Ralf Kotulla, U. of Wisconsin, Madison
CoI: Jenna Ryon, U. of Wisconsin, Madison
CoI: Rukmani Vijayaraghavan, U. of Illinois Urbana-Champaign

Title: Tracing the Assembly of the Perseus Galaxy Cluster

Abstract: In the cold dark matter paradigm of structure formation, galaxy clusters grow by accreting galaxies and smaller galaxy groups. Clusters are therefore dynamically young and contain complex substructures whose dynamics trace cluster growth. The current state of low-mass cluster galaxies depends on whether they experienced environmentally-driven evolution solely within the cluster environment, or already within a group environment before getting accreted onto the cluster. The degree and timescales of the transformation of star forming field galaxies into early-type cluster galaxies thus depend on their environmental histories, which can be quantified from the present-day dynamics and clumping of cluster galaxies. We therefore intend to study the evolution of the Perseus galaxy cluster's members through ODI imaging of dwarf galaxies and sub-clumps, both of which can be used as evolutionary clocks. The ODI data will also allow us to draw conclusions on environmental mechanisms by comparing the dwarf galaxy population of Perseus to those of Virgo and Fornax with their lower masses and intracluster gas densities.

Program Type: WTAC

Scheduled Nights:
Run 1 (2015B):  WIYN/ODI -- 2n on Nov 11 - Nov 14 2015


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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