Abundances of Recently Discovered Planetary Nebulae Towards the Galactic Bulge

Abstract

In this work we report spectrophotometric observations of a planetary nebula sample towards the galactic bulge. A total of 45 PNe was observed and their physical parameters (electron density and temperature) were derived. Ionic abundances were calculated using a three-level atom model and abundances were derived through ionisation correction factors. Results show low abundance objects at high galactic latitudes, indicating a possible vertical gradient inside the bulge. A few objects with low N/O ratio were found, which could originated from old, low mass progenitors.

11 pages, 8 figures. Accepted by A&A

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• The Extragalactic Distance Scale
• The Outer Regions of the Galactic Bulge:II Analysis
• Implications of New JHK Photometry and a Deep Infrared Luminosity Function for the Galactic Bulge
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