An [ITAL]XMM-Newton[/ITAL] Observation of NGC 1399 Reveals Two Phases of Hot Gas and Supersolar Abundances in the Central Regions

Abstract

We present an initial analysis of a new XMM observation of NGC 1399, the central elliptical galaxy of the Fornax group. Spectral fitting of the spatially resolved spectral data of the EPIC MOS and pn CCDs reveals that a two-temperature model (2T) of the hot gas is favored over single-phase and cooling flow models within the central ~20 kpc. The preference for the 2T model applies whether or not the data are deprojected. The cooler component has a temperature (~0.9 keV) similar to the kinetic temperature of the stars while the hotter component has a temperature (~1.5 keV) characteristic of the virial temperature of a ~10^{13} M_sun halo. The two-phase model (and other multitemperature models) removes the ``Fe Bias'' within r