NOAO >   Observing Info >   Approved Programs >   2010A-0266

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Proposal Information for 2010A-0266


PI: Sylvain Veilleux, University of Maryland, veilleux@astro.umd.edu
Address: Department of Astronomy, Stadium Drive, College Park, MD 20742, USA

CoI: Margaret Trippe, University of Maryland
CoI: Rob Swaters, University of Maryland
CoI: David Rupke, University of Hawaii
CoI: Alex McCormick, University of Maryland

Title: Deep Emission-Line Imaging of Local Galactic Winds with NEWFIRM

Abstract: Galactic winds or ``superwinds'' are the primary mechanism by which energy and metals are recycled in galaxies and deposited into the intergalactic medium. New observations are revealing the ubiquity of this process, particularly at high redshift. Measurements have shown that winds contain cool (molecular/neutral), warm (partly ionized), and hot (fully ionized) gases. Though most of the wind mass is contained in the dusty molecular gas, very little is known about this component. However, our recent observations of M 82 with NEWFIRM on the Mayall 4-m show that H_2 emission can be used as a sensitive tracer of the cool molecular wind component. We propose to use NEWFIRM to study the NIR molecular emission-line properties of a small but representative set of local wind galaxies. Deep images of these objects will be obtained at H_2 2.12 (micron) and [Fe II] 1.64 (mu)m, and combined with existing optical emission-line maps to (1) constrain the importance of molecular gas in the energetics of these winds (from H_2) and (2) determine the nature of the interaction between the central energy injection zone and the wind material, from the [Fe II] imaging. These data will complement an approved Spitzer program to constrain the hot dust content of these winds. The NEWFIRM and Spitzer programs will likely become part of the PhD thesis of A. McCormick.


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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