Mid-IR FORCAST/SOFIA Observations of M82
  We present 75"x75" size maps of M82 at 6.4 micron, 6.6 micron, 7.7 micron,
31.5 micron, and 37.1 micron 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" (~1kpc) 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 micron data to fit spectral energy distribution templates at
both emission peaks. The best fitting templates have extinctions of A_V = 18
and A_V = 9 toward the main and secondary emission peak and we estimated a
color temperature of 68 K at both peaks from the 31 micron and 37 micron
measurement. At the emission peaks the estimated dust masses are on the order
of 10^{4} M_sun.
