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A Chandra High-Resolution X-ray Image of Centaurus A.

Kraft, Forman, Jones

    The Astrophysical Journal
    |February 16, 2000
    PubMed
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    High-resolution X-ray imaging of Centaurus A reveals unprecedented detail in its nucleus and jet. The Chandra X-Ray Observatory observation resolved previously unseen structures, including diffuse emission between jet knots.

    Area of Science:

    • Astronomy and Astrophysics
    • High-Energy Astrophysics
    • X-ray Astronomy

    Background:

    • Centaurus A is a prominent radio galaxy with complex X-ray emission.
    • Previous observations provided limited spatial resolution for detailed analysis.
    • Understanding the central engine and jet dynamics of active galactic nuclei is crucial.

    Purpose of the Study:

    • To present the first results from a high-resolution Chandra X-ray Observatory observation of Centaurus A.
    • To resolve fine structures in the X-ray emission of Centaurus A's nucleus, jet, and surrounding regions.
    • To investigate the morphology and spatial characteristics of X-ray features not previously observed.

    Main Methods:

    • Utilized the High-Resolution Camera on the Chandra X-ray Observatory.

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  • Achieved spatial resolution better than 1 arcsecond in the central field of view.
  • Analyzed X-ray emission from the nucleus, jet, diffuse regions, and point sources.

    • Main Results:

    • Resolved all previously reported major X-ray emission sources, including the nucleus, jet, and diffuse emission.
    • Resolved individual knots of emission in the inner jet, revealing diffuse emission between them.
    • Detected an extended nucleus (a few tenths of an arcsecond), a potential X-ray counterjet, and weak emission from the southwest radio lobe. Identified 63 point-like sources.

    Conclusions:

    • The high spatial resolution of Chandra enables detailed study of previously unseen X-ray features in Centaurus A.
    • The resolved jet structures and extended nucleus provide new insights into the physics of active galactic nuclei.
    • The detected point sources offer a sample for studying X-ray binaries and supernova remnants in a galactic environment.