Abundances of Recently Discovered Planetary Nebulae Towards the Galactic Bulge

Details Abundances of Recently Discovered Planetary Nebulae Towards the Galactic Bulge Abundances of Recently Discovered Planetary Nebulae Towards the Galactic Bulge

2001-10-16

arxiv.org/abs/astro-ph/0110382v1

Astronomy and Astrophysics

Astrophysics

11 pages, 8 figures. Accepted by A&A

Scientific paper

10.1051/0004-6361:20011490

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.

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