Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way

Details Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way

2006-07-20

arxiv.org/abs/astro-ph/0607480v1

Astrophys.J.651:898-905,2006

Astronomy and Astrophysics

Astrophysics

The Astrophysical Journal, in press

Scientific paper

10.1086/507840

This paper presents a homogeneous study of abundances in a sample of 79 northern galactic planetary nebulae whose morphological classes have been uniformly determined. Ionic abundances and plasma diagnostics were derived from selected optical line strengths in the literature, and elemental abundances were estimated with the Ionization Correction Factor developed by Kingsbourgh & Barlow (1994). We compare the elemental abundances to the final yields obtained from stellar evolution models of low-and intermediate-mass stars, and we confirm that most Bipolar planetary nebulae have high nitrogen and helium abundance, and are the likely progeny of stars with main-sequence mass larger than 3 solar masses. We derive =0.27, and discuss the implication of such a high ratio in connection with the solar neon abundance. We determine the galactic gradients of oxygen and neon, and found Delta log (O/H)/Delta R=-0.01 dex/kpc$ and Delta log (Ne/H)/Delta R=-0.01 dex/kpc. These flat PN gradients do not reconcile with galactic metallicity gradients flattening with time.

Affiliated with

Also associated with

No associations

Rating

Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-169899