Elemental Abundances in NGC 3516
Astrophysics
2016-08-30 v1
Abstract
We present RGS data from an XMM-Newton observation of the Seyfert 1 galaxy NGC 3516, taken while the continuum source was in an extreme low state. The spectrum shows numerous emission lines including the H-like lines of C, N and O and the He-like lines of N, O and Ne. These data show that the N lines are far stronger than would be expected from gas of solar abundances. Based on our photoionization models, we find that N is overabundant compared to C, O and Ne by at least a factor of 2.5. We suggest this is the result of secondary production of N in intermediate mass stars, and indicative of the history of star formation in NGC 3516.
Cite
@article{arxiv.astro-ph/0305267,
title = {Elemental Abundances in NGC 3516},
author = {T. J. Turner and S. B. Kraemer and R. F. Mushotzky and I. M. George and J. R. Gabel},
journal= {arXiv preprint arXiv:astro-ph/0305267},
year = {2016}
}
Comments
19 pages, 3 color figures. ApJ in press