Planetary nebulae in the inner Milky Way

TL;DR

This paper reports new elemental abundance measurements for 56 planetary nebulae in the Milky Way's bulge, providing insights into the bulge-disk interface at 2.2 kpc based on observational data.

Contribution

It offers new abundance data for planetary nebulae in the galactic bulge and identifies the bulge-disk interface at 2.2 kpc through statistical analysis.

Findings

Abundance distributions are consistent with previous studies.

Identifies the bulge-disk interface at 2.2 kpc.

Provides accurate elemental abundances for 56 planetary nebulae.

Abstract

New abundances of planetary nebulae located towards the bulge of the Galaxy are derived based on observations made at LNA (Brazil). We present accurate abundances of the elements He, N, S, O, Ar, and Ne for 56 PNe located towards the galactic bulge. The data shows a good agreement with other results in the literature, in the sense that the distribution of the abundances is similar to those works. From the statistical analysis performed, we can suggest a bulge-disk interface at 2.2 kpc for the intermediate mass population, marking therefore the outer border of the bulge and inner border of the disk.