Iron Line Energy and Equivalent Width of the Galactic Ridge Emission

Details Iron Line Energy and Equivalent Width of the Galactic Ridge Emission Iron Line Energy and Equivalent Width of the Galactic Ridge Emission

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..439y&link_type=abstract

Publications of the Astronomical Society of Japan, v.47, p.439-443.

Astronomy and Astrophysics

Astronomy

9

Galaxies: Milky Way, Galaxies: X-Rays, Interstellar Medium, X-Rays: Spectra

Scientific paper

We report on the energy and equivalent width of the iron line as a function of the plasma temperature of the Galactic Ridge emission. The line energies and equivalent widths are systematically lower than those expected from a collisional ionization equilibrium plasma with cosmic abundance. We propose the possibility that the optically thin hot plasma is in a non-equilibrium ionization state with an ionization parameter (nt) of 10(10) --10(11) cm(-3) s, and give some constraints on the physical conditions of the Galactic Ridge plasma.

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