NOAO >   Observing Info >   Approved Programs >   2012A-0224

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Proposal Information for 2012A-0224


PI: Barry Rothberg, George Mason University, dr.barry.rothberg@gmail.com
Address: Department of Physics & Astronomy, MS 3F3 4400 University Drive, Fairfax, VA 22030, USA

CoI: Jacqueline Fischer, Naval Research Laboratory
CoI: Christopher Hayward, Harvard University
CoI: Lars Hernquist, Harvard University
CoI: Patrik Jonsson, Harvard University
CoI: Thomas J. Cox, Carnegie Observatories
CoI: Gregory Snyder, Harvard University
CoI: Paul Torrey, Harvard University
CoI: Shobita Satyapal, George Mason University

Title: Unveiling the Young Central Stellar Disk in the Advanced LIRG Arp 193: An In-Depth, Multi-Wavelength Case Study

Abstract: Recently, we have demonstrated the displacement of Luminous Infrared Galaxies on the \it K-band Fundamental Plane (FP) is due to the presence of bright Red Supergiants or Asymptotic Giant Branch stars. These stars reside in a central disk which reduces the observed CO (1.6 and 2.3 \micron) velocity dispersions (\sigma) by 30-50%. This causes LIRG mass measurements to be underestimated by ~ 10\times. While \sigmas from the Calcium II Triplet absorption lines (0.85 \micron) show LIRGs are indistinguishable from massive elliptical galaxies on the \it I-band FP. At \it I-band dust enshrouds the young stars, keeping them from affecting CaT measurements. We will, \it for the first time, spatially map the \it STELLAR kinematics of the young stellar disk on scales of tens of parsecs in the advanced LIRG Arp 193 using NIFS+Laser Guidestar AO on Gemini-N. We will compare these observations with multiwavelength ancillary data and simulations which combine new radiative transfer algorithms with \it N-body/SPH codes to model dust, gas, stars and AGN/supernovae feedback in merging galaxies in order to study how gas dissipation and young stellar disks are linked with the formation of super-massive black holes.


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 >   2012A-0224

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