Photoelectric Emission from Interstellar Dust: Grain Charging and Gas Heating

  title={Photoelectric Emission from Interstellar Dust: Grain Charging and Gas Heating},
  author={Joseph C. Weingartner and Bruce T. Draine},
  journal={Astrophysical Journal Supplement Series},
We model the photoelectric emission from and charging of interstellar dust and obtain photoelectric gas heating efficiencies as a function of grain size and the relevant ambient conditions. We employ improved estimates for photoelectric thresholds, yields, and electron capture rates. Using realistic grain size distributions, we evaluate the net gas heating rate for various interstellar environments and find less heating for dense regions characterized by RV = 5.5 than for diffuse regions with… Expand
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