Mid-IR forcast/SOFIA observations of M82
We present 75″ × 75″ size maps of M82 at 6.4 μm, 6.6 μm, 7.7 μm, 31.5 μm, and 37.1 μm with a resolution of ∼4″ that we have obtained with the mid-IR camera FORCAST on SOFIA. We find strong emission from the inner 60″ (∼1 kpc) along the major axis, with the main peak 5″ west-southwest of the nucleus and a secondary peak 4″ east-northeast of the nucleus. The detailed morphology of the emission differs among the bands, which is likely due to different dust components dominating the continuum emission at short mid-IR wavelengths and long mid-IR wavelengths. We include Spitzer-IRS and Herschel/PACS 70 μm data to fit spectral energy distribution templates at both emission peaks. The best-fitting templates have extinctions of A = 18 and A = 9 toward the main and secondary emission peak and we estimated a color temperature of 68 K at both peaks from the 31 μm and 37 μm measurement. At the emission peaks the estimated dust masses are on the order of 10 M . © 2012. The American Astronomical Society. All rights reserved. V V Ȯ 4
Astrophysical Journal Letters
Nikola, T.; Herter, T. L.; Vacca, W. D.; Adams, J. D.; De Buizer, J. M.; Gull, G. E.; Henderson, C. P.; Keller, L. D.; Morris, M. R.; Schoenwald, J.; Stacey, G.; and Tielens, A., "Mid-IR forcast/SOFIA observations of M82" (2012). Faculty Articles Indexed in Scopus. 1139.