Comparison of Theoretical Starburst Photoionisation Models for Optical Diagnostics. D'Agostino, J. J., Kewley, L. J., Groves, B., Byler, N., Sutherland, R. S., Nicholls, D., Leitherer, C., & Stanway, E. R. arXiv e-prints, 1905:arXiv:1905.09528, May, 2019.
Comparison of Theoretical Starburst Photoionisation Models for Optical Diagnostics [link]Paper  abstract   bibtex   
We study and compare different examples of stellar evolutionary synthesis input parameters used to produce photoionisation model grids using the MAPPINGS V modelling code. The aim of this study is to (a) explore the systematic effects of various stellar evolutionary synthesis model parameters on the interpretation of emission lines in optical strong-line diagnostic diagrams, (b) characterise the combination of parameters able to reproduce the spread of local galaxies located in the star-forming region in the Sloan Digital Sky Survey, and (c) investigate the emission from extremely metal-poor galaxies using photoionisation models. We explore and compare the stellar input ionising spectrum (stellar population synthesis code [Starburst99, SLUG, BPASS], stellar evolutionary tracks, stellar atmospheres, star-formation history, sampling of the initial mass function) as well as parameters intrinsic to the H II region (metallicity, ionisation parameter, pressure, H II region boundedness). We also perform a comparison of the photoionisation codes MAPPINGS and CLOUDY. On the variations in the ionising spectrum model parameters, we find that the differences in strong emission-line ratios between varying models for a given input model parameter are small, on average \textasciitilde0.1 dex. An average difference of \textasciitilde0.1 dex in emission-line ratio is also found between models produced with MAPPINGS and CLOUDY. Large differences between the emission-line ratios are found when comparing intrinsic H II region parameters. We find that low-metallicity galaxies are better explained by a density-bounded H II region and higher pressures better encompass the spread of galaxies at high redshift.
@article{dagostino_comparison_2019,
	title = {Comparison of {Theoretical} {Starburst} {Photoionisation} {Models} for {Optical} {Diagnostics}},
	volume = {1905},
	url = {http://adsabs.harvard.edu/abs/2019arXiv190509528D},
	abstract = {We study and compare different examples of stellar evolutionary 
synthesis input parameters used to produce photoionisation model grids
using the MAPPINGS V modelling code. The aim of this study is to (a)
explore the systematic effects of various stellar evolutionary synthesis
model parameters on the interpretation of emission lines in optical
strong-line diagnostic diagrams, (b) characterise the combination of
parameters able to reproduce the spread of local galaxies located in the
star-forming region in the Sloan Digital Sky Survey, and (c) investigate
the emission from extremely metal-poor galaxies using photoionisation
models. We explore and compare the stellar input ionising spectrum
(stellar population synthesis code [Starburst99, SLUG, BPASS], stellar
evolutionary tracks, stellar atmospheres, star-formation history,
sampling of the initial mass function) as well as parameters intrinsic
to the H II region (metallicity, ionisation parameter, pressure, H II
region boundedness). We also perform a comparison of the photoionisation
codes MAPPINGS and CLOUDY. On the variations in the ionising spectrum
model parameters, we find that the differences in strong emission-line
ratios between varying models for a given input model parameter are
small, on average {\textasciitilde}0.1 dex. An average difference of {\textasciitilde}0.1 dex in
emission-line ratio is also found between models produced with MAPPINGS
and CLOUDY. Large differences between the emission-line ratios are found
when comparing intrinsic H II region parameters. We find that
low-metallicity galaxies are better explained by a density-bounded H II
region and higher pressures better encompass the spread of galaxies at
high redshift.},
	urldate = {2019-05-29},
	journal = {arXiv e-prints},
	author = {D'Agostino, Joshua J. and Kewley, Lisa J. and Groves, Brent and Byler, Nell and Sutherland, Ralph S. and Nicholls, David and Leitherer, Claus and Stanway, Elizabeth R.},
	month = may,
	year = {2019},
	keywords = {Astrophysics - Astrophysics of Galaxies},
	pages = {arXiv:1905.09528},
}

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