Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-20
Astrophys.J.672:274-286,2008
Astronomy and Astrophysics
Astrophysics
13 pages, 4 tables, 5 figures. Accepted for publication in ApJ
Scientific paper
10.1086/523294
The chemical abundances of neon and sulfur for 25 planetary nebulae (PNe) in the Magellanic Clouds are presented. These abundances have been derived using mainly infrared data from the Spitzer Space Telescope. The implications for the chemical evolution of these elements are discussed. A comparison with similarly obtained abundances of Galactic PNe and HII regions and Magellanic Clouds HII regions is also given. The average neon abundances are 6.0x10(-5) and 2.7x10(-5) for the PNe in the Large and Small Magellanic Clouds respectively. These are ~1/3 and 1/6 of the average abundances of Galactic planetary nebulae to which we compare. The average sulfur abundances for the LMC and SMC are respectively 2.7x10(-6) and 1.0x10(-6). The Ne/S ratio (23.5) is on average higher than the ratio found in Galactic PNe (16) but the range of values in both data sets is similar for most of the objects. The neon abundances found in PNe and HII regions agree with each other. It is possible that a few (3-4) of the PNe in the sample have experienced some neon enrichment, but for two of these objects the high Ne/S ratio can be explained by their very low sulfur abundances. The neon and sulfur abundances derived in this paper are also compared to previously published abundances using optical data and photo-ionization models.
Bernard-Salas Jeronimo
Gutenkunst S.
Houck James R.
Morris Pat W.
Pottasch Stuart R.
No associations
LandOfFree
Neon and Sulfur Abundances of Planetary Nebulae in the Magellanic Clouds 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 Neon and Sulfur Abundances of Planetary Nebulae in the Magellanic Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neon and Sulfur Abundances of Planetary Nebulae in the Magellanic Clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-255921