Other
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...211...68d&link_type=abstract
Astrophysical Journal, vol. 211, Jan. 1, 1977, pt. 1, p. 68-76.
Other
50
Abundance, Astronomical Spectroscopy, Chemical Composition, Line Spectra, Magellanic Clouds, Planetary Nebulae, Electron Density (Concentration), Electron Energy, H Ii Regions, Hydrogen Atoms, Image Tubes, Ion Concentration, Nitrogen Atoms, Spectral Emission, Spectral Energy Distribution
Scientific paper
The paper studies the detailed spectral characteristics of the planetary nebulae N97 and N153 in the Large Magellanic Cloud (LMC), the planetary nebula N67 in the Small Magellanic Cloud (SMC), and the small H II regions N9, N61, and N81 in the SMC. Electron temperatures and densities for each nebula are derived from emission-line strengths determined by photographic spectrophotometry, and relative abundances are estimated for H, He, N, O, Ne, Ar, and S. The results show that: (1) N67 has a 60% overabundance in He/H while N97 and N153 have approximately normal He/H values; (2) all three planetaries have N/H values comparable to those of galactic planetaries but substantially higher than found in the H II regions of their respective Cloud; (3) the O/H values in the planetaries are similar to or lower than those in the H II regions of the respective Cloud; (4) the O/Ne, O/S, and O/Ar ratios in the two LMC planetaries are comparable to those in galactic planetaries; (5) the compositions of the small H II regions in the SMC are nearly identical to those of previously studied large H II regions in the same Cloud; and (6) the He/H ratio of the interstellar gas in the SMC is about 25% less than that in the Galaxy. It is concluded that most of the N abundance in both Clouds arose from nucleosynthesis sources other than planetary nebulae.
Dufour Reginald James
Killen Rosemary Margaret
No associations
LandOfFree
The chemical composition of three 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 The chemical composition of three planetary nebulae in the Magellanic Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The chemical composition of three planetary nebulae in the Magellanic Clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-951588