1209.0808 (Luc Binette et al.)

Discrepancies between the [OIII] and [SIII] Temperatures in HII Regions    [PDF]

Luc Binette, Roy Matadamas, Guillermo F. Hägele, David C. Nicholls, Gladis Magris C., María de los Angeles Peña-Guerrero, Christophe Morisset, Ary Rodríguez-González

An analysis of the OIII and SIII temperatures measurements compiled by Perez-Montero et al. of emission line objects consisting of HII galaxies, giant extragalactic HII regions, Galactic HII regions and HII regions from the Magellanic Clouds, reveals that the OIII temperatures are higher than the corresponding values from SIII in most objects with gas metallicities in excess of 0.2 solar. We explore the possibility of inhomogeneities in abundances by combining two models of widely different metallicity. We calculate models that consider the possibility of kappa-distributions for the electron energies. We also consider shock heating within the photoionized nebula.

View original: http://arxiv.org/abs/1209.0808