Large-scale shock-ionized and photo-ionized gas in M83: the impact of star formation

@article{Hong2011LargescaleSA,
  title={Large-scale shock-ionized and photo-ionized gas in M83: the impact of star formation},
  author={Sungryong Hong and Daniela Calzetti and Michael A. Dopita and William P. Blair and Bradley C. Whitmore and Bruce Balick and Howard E. Bond and Marcella Carollo and Michael John Disney and Jay. A. Frogel and Donald B. Hall and Jon A. Holtzman and Randy A. Kimble and Patrick McCarthy and Robert W. O’Connell and Francesco Paresce and Abhijit Kumar Saha and Joseph I. Silk and John Terry Trauger and Alistair R. Walker and Rogier A. Windhorst and Erick T. Young and Max J. Mutchler},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2011}
}
We investigate the ionization structure of the nebular gas in M83 using the line diagnostic diagram, [O III](5007 \degA)/H{\beta} vs. [S II](6716 \deg A+6731 \deg A)/H{\alpha} with the newly available narrowband images from the Wide Field Camera 3 (WFC3) of the Hubble Space Telescope (HST). We produce the diagnostic diagram on a pixel-by-pixel (0.2" x 0.2") basis and compare it with several photo- and shock-ionization models. For the photo-ionized gas, we observe a gradual increase of the log… 
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