Metallicity gradients in M31, M33, NGC 300, and Milky Way using Argon abundances
Abstract
We studied Planetary Nebulae (PNe) metallicity gradients using Ar abundances. We compared them with H ii regions in the galaxies of the local universe M 31, M 33, NGC 300 and in the Milky Way. Galactocentric radio (RG) and chemical abundances were collected from the literature, carefully selecting an homogeneous sample for each galaxy. In these galaxies, metallicity gradients computed with PNe abundances are flatter than those of H ii regions.
- Publication:
-
IAU General Assembly
- Pub Date:
- March 2020
- DOI:
- 10.1017/S1743921319004319
- Bibcode:
- 2020IAUGA..30..268F
- Keywords:
-
- ISM: planetary nebulae;
- galaxies: ISM