An atlas of star-forming galaxy equivalent widths

Meskhidze, Helen; Richardson, Chris
November 2017
Astrophysics & Space Science;Nov2017, Vol. 362 Issue 11, p1
Academic Journal
We present an atlas of starburst galaxy emission lines spanning 10 orders of magnitude in ionizing flux and 7 orders of magnitude in hydrogen number density. Coupling SEDs from Starburst99 with photoionization calculations from Cloudy, we track 96 emission lines from 977 Ã… to $205~\upmu\mbox{m}$ which are common to nebular regions, have been observed in H II regions, and serve as useful diagnostic lines. Each simulation grid displays equivalent widths and contains $\sim1.5\times10^{4}$ photoionization models calculated by supplying a spectral energy distribution, chemical abundances, dust content, and gas metallicity (ranging from $0.2~Z _{\odot}$ to $5.0~Z _{\odot}$ ). Our simulations will prove useful in starburst emission line data analysis, especially regarding local starburst galaxies that show high ionization emission lines. One sample application of our atlas predicts that C IV $\lambda$ 1549 will serve as a useful diagnostic emission line of vigorous star formation for coming James Webb Space Telescope observations predicting a peak equivalent width of approximately 316 Ã….


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