Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium

  title={Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium},
  author={Aigen Li and Bruce T. Draine},
  journal={The Astrophysical Journal},
  pages={778 - 802}
We present a quantitative model for the infrared emission from dust in the diffuse interstellar medium. The model consists of a mixture of amorphous silicate grains and carbonaceous grains, each with a wide size distribution ranging from molecules containing tens of atoms to large grains ≳1 μm in diameter. We assume that the carbonaceous grains have properties like polycyclic aromatic hydrocarbons (PAHs) at very small sizes and graphitic properties for radii a ≳ 50 Å. On the basis of recent… 

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