%0 Journal Article
%T SOFIA/FORCAST Observations of Warm Dust in S106: A Fragmented Environment
%A J. D. Adams
%A T. L. Herter
%A J. L. Hora
%A N. Schneider
%A R. M. Lau
%A J. G. Staughn
%A R. Simon
%A N. Smith
%A R. D. Gehrz
%A L. E. Allen
%A S. Bontemps
%A S. J. Carey
%A G. G. Fazio
%A R. A. Gutermuth
%A A. Guzman Fernandez
%A M. Hankins
%A T. Hill
%A E. Keto
%A X. P. Koenig
%A K. E. Kraemer
%A S. T. Megeath
%A D. R. Mizuno
%A F. Motte
%A P. C. Myers
%A H. A. Smith
%J Physics
%D 2015
%I arXiv
%X We present mid-IR (19 - 37 microns) imaging observations of S106 from SOFIA/FORCAST, complemented with IR observations from Spitzer/IRAC (3.6 - 8.0 microns), IRTF/MIRLIN (11.3 and 12.5 microns), and Herschel/PACS (70 and 160 microns). We use these observations, observations in the literature, and radiation transfer modeling to study the heating and composition of the warm (~ 100 K) dust in the region. The dust is heated radiatively by the source S106 IR, with little contributions from grain-electron collisions and Ly-alpha radiation. The dust luminosity is >~ (9.02 +/- 1.01) x 10^4 L_sun, consistent with heating by a mid- to late-type O star. We find a temperature gradient (~ 75 - 107 K) in the lobes, which is consistent with a dusty equatorial geometry around S106 IR. Furthermore, the SOFIA observations resolve several cool (~ 65 - 70 K) lanes and pockets of warmer (~ 75 - 90 K) dust in the ionization shadow, indicating that the environment is fragmented. We model the dust mass as a composition of amorphous silicates, amorphous carbon, big grains, very small grains, and PAHs. We present the relative abundances of each grain component for several locations in S106.
%U http://arxiv.org/abs/1510.04360v1