Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-07-04
Astrophys.J.634:1056-1066,2005
Astronomy and Astrophysics
Astrophysics
36 pages, Accepted for publication in the Astrophysical Journal
Scientific paper
10.1086/444557
We present long slit spectrophotometry of regions V and X of the local group irregular galaxy NGC 6822. The data consist of VLT FORS observations in the 3450 to 7500 A range. We have obtained electron temperatures and densities using different line intensity ratios. We have derived the He, C, and O abundances relative to H based on recombination lines, the abundance ratios among these elements are almost independent of the temperature structure of the nebulae. We have also determined the N, O, Ne, S, Cl, and Ar abundances based on collisionally excited lines, the ratios of these abundances relative to that of H depend strongly on the temperature structure of the nebulae. The chemical composition of NGC 6822 V is compared with those of the Sun, the Orion nebula, NGC 346 in the SMC, and 30 Doradus in the LMC. The O/H value derived from recombination lines is in good agreement with the value derived by Venn et al. (2001) from two A type supergiants in NGC 6822.
Peimbert Antonio
Peimbert Manuel
Ruiz María Teresa
No associations
LandOfFree
Chemical Composition of Two H II Regions in NGC 6822 Based on VLT Spectroscopy 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 Chemical Composition of Two H II Regions in NGC 6822 Based on VLT Spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical Composition of Two H II Regions in NGC 6822 Based on VLT Spectroscopy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-58851