X-ray Arc Structures in Chandra Images of NGC5128 (Centaurus A)

Abstract

We describe results from our initial study of the diffuse X-ray emission structures in NGC 5128 (Cen A) using the Chandra X-ray Observatory observations. The high-angular resolution Chandra images reveal multi-scale X-ray struct ures with unprecedented detail and clarity. The large scale structures suggest complex symmetry, including a component possibly associated with the inner radio lobes, and a separate component with an orthogonal symmetry that may be associated with the galaxy as a whole. We detect arc-like soft X-ray structures, extending to ~8 kpc in the direction perpendicular to the jet. These arcs appear to be tracing an ellipse, or a ring seen in projection, and ar e enclosed between the dust and HI emitting gas in the central region of the galaxy, and the optical and HI shell fragments at a distance of about 8-10 kpc. The diffuse X-ray and the optical emission in the arcs could originate in a region of interaction (possibly a shock) between the infalling material from the outer regions of the galaxy, and the cool dust and HI emitting material in the center, or an equatorial outflow resulting from an outburst of nuclear activity ~10^7 years ago.

arXiv comment8 pages, three color figures, to be published in ApJ September 20, 2002 issue

References in corpus (7)

• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• Centaurus A - NGC 5128
• Cooling flows and quasars: different aspects of the same phenomenon? I. Concepts
• Chandra Observations of NGC 4636 - An Elliptical Galaxy in Turmoil
• Chandra Observations of the X-ray Jet in Centaurus A
• Peering through the dust: Evidence for a supermassive Black Hole at the nucleus of Centaurus A from VLT IR spectroscopy
• ROSAT HRI observations of Centaurus A

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