arxiv: astro-ph/9908253 · v1 · submitted 1999-08-23 · 🌌 astro-ph

BeppoSAX unveils the nuclear component in NGC 6240

P. Vignati , S. Molendi , G. Matt , M. Guainazzi , L.A. Antonelli , L. Bassani , W.N. Brandt , A.C. Fabian

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K. Iwasawa R. Maiolino G. Malaguti A. Marconi G.C. Perola

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keywords bepposaxgalaxynuclearx-rayabsorberappearanceassumingbeen

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The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed for the first time by BeppoSAX. It is seen through an absorber with N_H=2*10^{24} cm^{-2}. The 2-10 keV X-ray luminosity >10^{44} erg s^{-1} definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical L_X/L_bol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.

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BeppoSAX unveils the nuclear component in NGC 6240

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