[ITAL]ROSAT[/ITAL] HRI Observations of Centaurus A | Zendy

S. Döbereiner | Zendy; N. Junkes | Zendy; S. J. Wagner | Zendy; H. Zinnecker | Zendy; R. A. E. Fosbury | Zendy; G. Fabbiano | Zendy; E. Schreier | Zendy

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[ITAL]ROSAT[/ITAL] HRI Observations of Centaurus A

Author(s) -

S. Döbereiner,

N. Junkes,

S. J. Wagner,

H. Zinnecker,

R. A. E. Fosbury,

G. Fabbiano,

E. Schreier

Publication year - 1996

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/310288

Subject(s) - rosat , centaurus a , physics , astrophysics , luminosity , galaxy , astronomy , active galactic nucleus , radio galaxy , galactic halo , jet (fluid) , halo , thermodynamics

We present results from a sensitive high-resolution X-ray observation of thenearby active galaxy Centaurus A (NGC 5128) with the ROSAT HRI. The 65~ksecX-ray image clearly distinguishes different components of the X-ray emissionfrom Cen A: the nucleus and the jet, the diffuse galaxy halo, and a number ofindividual sources associated with the galaxy. The luminosity of the nucleusincreased by a factor of two compared to an earlier ROSAT observation in 1990.The high spatial resolution of the ROSAT HRI shows that most of the knots inthe jet are extended both along and perpendicular to the jet axis. We reportthe detection of a new X-ray feature, at the opposite side of the X-ray jetwhich is probably due to compression of hot interstellar gas by the expandingsouthwestern inner radio lobe.Comment: To be published in Astrophys. Journal Letters. 4 pages, 3 plate

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