PI: David Sand, Texas Technical University, firstname.lastname@example.org
Address: Physics Department, Box 41051, Lubbock, TX 79409 United States
CoI: Allie Hughes, Texas Technical University
CoI: Denija Crnojevic, Texas Technical University
CoI: Jay Strader, Michigan State U.
CoI: Duncan Forbes, Swinburne U.
CoI: Anil Seth, University of Utah
CoI: Nelson Caldwell, Harvard-Smithsonian Center for Astrophysics
CoI: Joshua Simon, Carnegie Observatories
CoI: Raja Guhathakurta, UC Santa Cruz
CoI: Elisa Toloba, UC Santa Cruz
Title: Globular Cluster Kinematics and Substructure in Centaurus A's Halo
Abstract: We request two nights of AAOmega spectroscopy of our new sample of Centaurus A globular cluster candidates. These candidates were found via our extended deep imaging campaign of Centaurus A's halo, which has uncovered numerous stellar substructures and dwarf galaxies out to R$sim$150 kpc, a factor of $sim$3-5 farther than previous globular cluster work in the nearest elliptical galaxy. Initial spectroscopy and Hubble Space Telescope imaging has revealed several new globular cluster examples associated with our newly found streams and stellar substructures, but velocities are needed to assess the population as a whole. The AAOmega dataset will be combined with our Centaurus A map in order to measure the total halo mass and investigate any kinematic+spatial substructure. These results will be directly compared with the handful of similar datasets in the Local Group and Virgo cluster.
Program Type: Standard/Extragalactic
Run 1 (2017A): AAT/AAOmega -- 2n on May 03 - May 04 2017
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360