The Metallicity Dependence of PAH Emission in Galaxies. I. Insights from Deep Radial Spitzer Spectroscopy

We use deep Spitzer mid-infrared spectroscopic maps of radial strips across three nearby galaxies with well-studied metallicity gradients (M101, NGC 628, and NGC 2403) to explore the physical origins of the observed deficit of polycyclic aromatic hydrocarbons (PAHs) at subsolar metallicity (i.e., th...

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Veröffentlicht in:	The Astrophysical journal 2024-10, Vol.974 (1), p.20
Hauptverfasser:	Whitcomb, Cory M., Smith, J.-D. T., Sandstrom, Karin, Starkey, Carl A., Donnelly, Grant P., Draine, Bruce T., Skillman, Evan D., Dale, Daniel A., Armus, Lee, Hensley, Brandon S., Lai, Thomas S.-Y., Kennicutt, Robert C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical models Emission Galaxies Galaxy distribution Grain growth Grain size distribution Infrared spectra Infrared spectroscopy Interstellar matter Interstellar medium Ionizing radiation Luminosity Metallicity Polycyclic aromatic hydrocarbons Spectroscopy Spiral galaxies
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