NOAO >   Observing Info >   Approved Programs >   2014B-0214

Small NOAO Logo

Proposal Information for 2014B-0214


PI: Christopher O'Dea, Rochester Institute of Technology, odea@cis.rit.edu
Address: School of Physics & Astronomy, 84 Lomb Memorial Dr., Rochester, NY 14534, USA

CoI: Grant Tremblay, European Southern Observatory
CoI: Stefi Baum, Rochester Institute of Technology
CoI: Alice Quillen, University of Rochester
CoI: Helen Russell, University of Waterloo
CoI: Brian McNamara, University of Waterloo
CoI: Megan Donahue, Michigan State
CoI: Alastair Edge, University of Durham
CoI: Andy Fabian, University of Cambridge
CoI: Jeremy Sanders, MPE

Title: Probing the Origin of a Dusty Ring Surrounding the Central Dominant Galaxies in RXJ 0751.3+5012

Abstract: X-ray observations of RXJ0751.3+5012 reveal two galaxy groups with disturbed morphologies which appear to be in the process of merging. The \emphSpitzer 8 (micron) image of RXJ0751.3+5012 shows a striking bright oval ring of emission surrounding the two central elliptical galaxies in the northern group. This feature is unique in the sample of clusters studied with Spitzer and is likely to have been produced in the group or subgroup merger. We have already been awarded 100 ks of Chandra time to observe this system. Here we propose IFU observations to study the nature and kinematics of this ring feature. Together, this X-ray and optical data should provide unique insights into the merging of these groups. The ring, being located outside of both central elliptical galaxies will provide unique and independent estimate of enclosed mass. Thus with this data, we will estimate the mass in the ring (hot gas, warm gas, stars), its kinematics (expanding, rotating) and dynamical age, the dust content (from the Balmer decrement), star formation rate (from H(alpha)), and stellar content and age.


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



NOAO >   Observing Info >   Approved Programs >   2014B-0214

noaoprop-help@noao.edu

Small NOAO Logo