Deep Emission-Line Imaging of Local Galactic Winds with NEWFIRM: Part II.

Details Deep Emission-Line Imaging of Local Galactic Winds with NEWFIRM: Part II. Deep Emission-Line Imaging of Local Galactic Winds with NEWFIRM: Part II.

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..100v&link_type=abstract

NOAO Proposal ID #2010B-0100

Computer Science

Scientific paper

Galactic winds are the primary mechanism by which energy and metals are recycled in galaxies and deposited into the IGM. 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 likely 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 emission- line properties of a small but representative set of local wind galaxies. Deep images of these objects will be obtained at H_2 2.122 (micron) and [Fe II] 1.644 (micron) and combined with existing optical emission-line maps to (1) constrain the importance of molecular gas in the energetics of these winds and (2) determine the nature of the interaction between the central energy injection zone and the wind material. 5 nights were allocated for this program in 10B; we now request to observe the rest of the sample. These data will complement an approved Spitzer program to constrain the hot dust content of these winds, and likely become part of A. McCormick's PhD thesis.

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