Authors: Kevin V. Croxall, Richard W. Pogge, Danielle A. Berg, Evan D. Skillman, and John Moustakas
2016 The Astrophysical Journal8304.
Provider: AAS Journals
Caption: Figure 4.
Plots of T[O II] against T[N II] (top) and T[S II] against T[N II] (bottom) measured for H II regions in NGC 5457. The dashed one-to-one line plotted shows that the data are in agreement with these ions being isothermal.