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The Relationship Between PAH Emission and Gas Tracers in the Large Magellanic Cloud
Wong, Tony H. ( University of Illinois ); Xue, R. ( University of Illinois ); Whitney, B. ( University of Wisconsin-Madison ); Heitsch, F. ( University of North Carolina ); Hughes, A. ( Max Planck Institute for Astronomy, Germany ); Bolatto, A. D. ( University of Maryland ); Robitaille, T. ( Max Planck Institute for Astronomy, Germany ) show affiliations
American Astronomical Society, AAS Meeting #222, id.216.03
Published in Jun 2013
The Spitzer SAGE 8-micron image of the LMC is strongly dominated by interstellar emission from PAH molecules, and offers spatial and brightness dynamic range which far exceeds what is available from spectral-line radio observations. We examine the correlation of this emission with other gas tracers, including the radio lines of CO, HI, and HCO+ as observed by the ATCA and Mopra telescopes, and archival UV absorption spectra of HI and H2 from the HST and FUSE. We show preliminary results of radiative transfer simulations using the HYPERION code aimed at identifying regimes and techniques for using 8-micron emission as a high resolution (sub-pc) tracer of gas density.
(c) 2013: American Astronomical Society