Effective temperature of ionizing stars in extragalactic H iiregions – II. Nebular parameter relationships based on CALIFA data
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DOI: 10.1093/mnras/sty3026
Abstract: We calculate the effective temperature ($T_{\rm eff}$) of ionizing star(s), oxygen abundance of the gas phase $(\rm O/H)$, and the ionization parameter $U$ for a sample of H\,{\sc ii} regions located in the disks of… read more here.
Keywords: califa data; effective temperature; oxygen abundance; gradient ... See more keywords
A machine learning artificial neural network calibration of the strong-line oxygen abundance
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DOI: 10.1093/mnras/stz649
Abstract: The HII region oxygen abundance is a key observable for studying chemical properties of galaxies. Deriving oxygen abundances using optical spectra often relies on empirical strong-line calibrations calibrated to the direct method. Existing calibrations usually… read more here.
Keywords: oxygen; line; oxygen abundance; neural network ... See more keywords