Elemental abundances in NGC 3516

T. J. Turner, S. B. Kraemer, R. F. Mushotzky, I. M. George, Jack Gabel

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We present Reflection Grating Spectrometer data from an XMM-Newton observation of the Seyfert 1 galaxy NGC 3516, taken while the continuum source was in an extremely low flux state. This observation offers a rare opportunity for a detailed study of emission from a Seyfert 1 galaxy, as these are usually dominated by high nuclear continuum levels and heavy absorption. The spectrum shows numerous narrow emission lines (FWHM ≲, 1300 km s-1) in the 0.3-2 keV range, including the H-like lines of C, N, and O and the He-like lines of N, O, and Ne. The emission-line ratios and the narrow width of the radiative recombination continuum of C VI indicate that the gas is photoionized and of fairly low temperature (kT ≲ 0.01 keV). The availability of emission lines from different elements for two isoelectronic sequences allows us to constrain the element abundances. 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 nitrogen is overabundant in the central regions of the galaxy, compared to carbon, oxygen, and neon, by at least a factor of 2.5. We suggest that this is the result of secondary production of nitrogen in intermediate-mass stars and indicative of the history of star formation in NGC 3516.

Original languageEnglish
Pages (from-to)128-135
Number of pages8
JournalAstrophysical Journal
Volume594
Issue number1 I
DOIs
StatePublished - Sep 1 2003
Externally publishedYes

Fingerprint

galaxies
continuums
H lines
nitrogen
isoelectronic sequence
neon
secondary production
radiative recombination
XMM-Newton telescope
gases
gas
newton
recombination
availability
photoionization
star formation
spectrometer
histories
gratings
spectrometers

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

Turner, T. J., Kraemer, S. B., Mushotzky, R. F., George, I. M., & Gabel, J. (2003). Elemental abundances in NGC 3516. Astrophysical Journal, 594(1 I), 128-135. https://doi.org/10.1086/376901

Elemental abundances in NGC 3516. / Turner, T. J.; Kraemer, S. B.; Mushotzky, R. F.; George, I. M.; Gabel, Jack.

In: Astrophysical Journal, Vol. 594, No. 1 I, 01.09.2003, p. 128-135.

Research output: Contribution to journalArticle

Turner, TJ, Kraemer, SB, Mushotzky, RF, George, IM & Gabel, J 2003, 'Elemental abundances in NGC 3516', Astrophysical Journal, vol. 594, no. 1 I, pp. 128-135. https://doi.org/10.1086/376901
Turner TJ, Kraemer SB, Mushotzky RF, George IM, Gabel J. Elemental abundances in NGC 3516. Astrophysical Journal. 2003 Sep 1;594(1 I):128-135. https://doi.org/10.1086/376901
Turner, T. J. ; Kraemer, S. B. ; Mushotzky, R. F. ; George, I. M. ; Gabel, Jack. / Elemental abundances in NGC 3516. In: Astrophysical Journal. 2003 ; Vol. 594, No. 1 I. pp. 128-135.
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