Exploring the Correlation of Oxygen Abundance and Ionization Parameter in NGC 628 with SIGNALS
Apr 18, 2024·
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Ray Garner
Rob Kennicutt
Laurie Rousseau-Nepton
Grace Olivier
David Fernández
Image Credit: ESA/Webb, NASA & CSA, J. Lee and the PHANGS-JWST TeamAbstract
The variations of oxygen abundance and ionization parameter in H II regions are usually thought to be the dominant factors that produce the variations seen in observed emission line spectra. However, if and how these two quantities are physically related is hotly debated in the literature. We present ongoing research into the correlation between abundance and ionization parameter using the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey’s (SIGNALS) large sample of Local Universe H II regions collected with the CFHT imaging spectrograph SITELLE. Using a combination of this large observational data set and photoionization models, we show that the correlation (if any) between ionization parameter and oxygen abundance is highly model dependent.
Date
Apr 18, 2024
Location
Space Telescope Science Institute
3700 San Martin Dr, Baltimore, MD 21218
Conference Presentations
TAMU
Signals
IFTS
NGC 628
HII Regions
Modeling
Abundances
Ionization Parameter
STScI
Conference
Baltimore
Maryland
Authors
Ray Garner
(he/him)
TAMU Astronomy Postdoctoral Researcher
I’m a scientist, Star Wars fan, and amateur photographer raised in Georgia. My research interests include galaxy evolution, star formation, and nebular diagnostics.