6533b85dfe1ef96bd12bea57
RESEARCH PRODUCT
XMM-Newton observations of the supernova remnant IC 443: II. evidence of stellar ejecta in the inner regions
Fabrizio BocchinoEleonora TrojaEleonora TrojaMarco MiceliFabio RealeFabio Realesubject
PhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsPlasmaAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsPhoton energyAstrophysicsPulsar wind nebulaSupernovaSpace and Planetary ScienceIonizationEmission spectrumEjectaSupernova remnantAstrophysics::Galaxy Astrophysicsdescription
We investigate the spatial distribution of the physical and chemical properties of the hot X-ray emitting plasma of the supernova remnant IC 443, in order to get important constraints on its ionization stage, on the progenitor supernova explosion, on the age of the remnant, and its physical association with a close pulsar wind nebula. The hard X-ray thermal emission (1.4-5.0 keV) of IC 443 displays a centrally-peaked morphology, its brightness peaks being associated with hot (kT>1 keV) X-ray emitting plasma. A ring-shaped structure, characterized by high values of equivalent widths and median photon energy, encloses the PWN. Its hard X-ray emission is spectrally characterized by a collisional ionization equilibrium model, and strong emission lines of Mg, Si, and S, requiring oversolar metal abundances. Dynamically, the location of the ejecta ring suggests an SNR age of ~4,000 yr. The presence of overionized plasma in the inner regions of IC 443, addressed in previous works, is much less evident in our observations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-04-07 |