NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-19 T07:55:36 PDT
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For refcode 2000A&A...364L..80G:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2000A&A...364L..80G On the hypothesis of an advection-dominated flow in the core of NGC 1052: new constraints from a BeppoSAX observation. GUAINAZZI M., OOSTERBROEK T., ANTONELLI L.A., MATT G. Received 14 September 2000/Accepted 17 November 2000 Abstract: We report the results of a broadband (0.1-100keV) X-ray observation of the nearby elliptical galaxy NGC 1052, performed with the BeppoSAX observatory. We confirm the presence of a bright (2-10keV luminosity ~4 x 10^42^ erg s^-1^) and strongly absorbed (N_H_ ~ 2 x 10^23^cm^-2^) X-ray source. The flatness of the X-ray spectrum (photon index, {GAMMA}, =~ 1.4), the estimated low accretion rate (m^dot^ = M^dot^/M_EDD_^dot^ ~ 10^-4^) and the radio-to-X-ray spectral energy distribution suggest that this observation may represent the first direct measurement above 10keV of an accretion-dominated flow in an elliptical galaxy. Key words: accretion, accretion disks - galaxies: active - galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 1052 - galaxies: nuclei - X-rays: galaxies
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