Search results for "Fornax Cluster"

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Deep ROSAT-HRI observations of the NGC 1399/NGC 1404 region: morphology and structure of the X-ray halo

2001

We present the analysis of a deep (167 ks) ROSAT HRI observation of the cD galaxy NGC 1399 in the Fornax cluster. Using both HRI and, at larger radii, archival PSPC data, we find that the radial behavior of the X-ray surface brightness profile is not consistent with a simple Beta model and suggests instead three distinct components. We use a multi-component bidimensional model to study in detail these three components that we identify respectively with the cooling flow region, the galactic and the cluster halo. From these data we derive a binding mass distribution in agreement with that suggested by optical dynamical indicators, with an inner core dominated by luminous matter and an extende…

Nuclear and High Energy PhysicsAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsGalaxies: jetCooling flowAstrophysicsRadio continuum: galaxieSettore FIS/05 - Astronomia E AstrofisicaGalaxies: clusters: individual (Fornax)ROSATclusters: individual (Fornax); Galaxies: halos; Galaxies: jets; Radio continuum: galaxies; X-rays: galaxies X-rays: individual (NGC 1399 NGC 1404); Space and Planetary Science; Nuclear and High Energy Physics [Galaxies]Surface brightnessFornax ClusterAstrophysics::Galaxy AstrophysicsPhysicsAstrophysics (astro-ph)Astronomy and AstrophysicsGalaxyRam pressureDark matter haloSpace and Planetary ScienceHaloGalaxies: haloX-rays: galaxies X-rays: individual (NGC 1399 NGC 1404)
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Deep ROSAT-HRI observation of the cD galaxy NGC 1399 in the fornax cluster: Morphology and dynamical status of the X-ray halo

2002

We present the results of a deep (167 ks) observation of the NGC 1399/NGC 1404 field obtained from data collected between 1993 and 1996 with the ROSAT High Resolution Imager. We take advantage of the 5" resolution of the HRI to study in detail the structure of the galactic halo and to relate the results to those obtained at larger scales with poorer resolution instruments. We discuss possible non-equilibrium scenarios that may explain the global halo structure. We also find evidence of interactions between the nuclear radio source and the inner gaseous halo.

cD galaxies Rosat/HRI Fornax Cluster X-ray HaloSettore FIS/05 - Astronomia E Astrofisica
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