A differential study of inner and outer disk HII regions of nearby spiral galaxies
Abstract
HII regions are all studied following the same general prescription and models, but the influence of their environments may produce differences in their star formation processes. We analyse two samples of 725 inner and 671 outer disk HII regions from 263 nearby spiral galaxies, observed by the CALIFA survey with integral field spectroscopy. Observations are compared with predictions of 540 Cloudy photoionisation models using diagnostic and evolutionary diagrams. Systematic physical differences are confirmed between ionising clusters of inner and outer HII regions. These differences condition the validity and range of reliability of oxygen abundance and ionisation parameter calibrations commonly applied to the study of HII regions.
- Publication:
-
XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society
- Pub Date:
- July 2020
- Bibcode:
- 2020sea..confE..75R