Spectral signatures of X ray photoionized nebulae

Details Spectral signatures of X ray photoionized nebulae Spectral signatures of X ray photoionized nebulae

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..505l&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 505-509 (SEE N90-25711 19-89)

Astronomy and Astrophysics

Astronomy

4

Gratings (Spectra), Nebulae, Photoionization, Spectral Signatures, X Ray Astronomy, X Ray Spectra, Coronas, Cosmic Rays, Emission Spectra, Iron, Line Spectra, Spectrum Analysis, X Ray Sources

Scientific paper

The applicability of the tools of X ray line spectroscopy into regions of the physical parameter space not addressed by existing plasma emission codes is considered. Atomic models for the ions Fe XVI to XIX are calculated assuming conditions appropriate to X ray photoionized cosmic sources. The resulting L-shell line spectra are easily distinguished from coronal spectra and provide diagnostics of the dominant level population mechanisms operating in the line emitting regions. Einstein objective grating spectra from the low mass X ray binaries, Cyg X-2, GX9+9, and 4U1820-30, may be consistent with predictions of spectra from X ray photoionized sources.

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