Improved collision strengths and line ratios for forbidden [O III] far-infrared and optical lines

  title={Improved collision strengths and line ratios for forbidden [O III] far-infrared and optical lines},
  author={Ethan Palay and Sultana N. Nahar and Anil Kumar Pradhan and Werner Eissner},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
Far-infrared and optical [O III] lines are useful temeprature-density diagnostics of nebular as well as dust obscured astrophysical sources. Fine structure transitions among the ground state levels 1s^22s^22p^3 \ ^3P_{0,1,2} give rise to the 52 and 88 micron lines, whereas transitions among the $^3P_{0,1,2}, ,^1D_2, ^1S_0$ levels yield the well-known optical lines 4363, 4959 and 5007 Angstroms. These lines are excited primarily by electron impact excitation. But despite their importance in… 

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