BeppoSAX unveils the nuclear component in NGC 6240
Vignati, P. · Molendi, S. · Matt, G. · Guainazzi, M. · Antonelli, L. A. · Bassani, L. · Brandt, W. N. · Fabian, A. C. · Iwasawa, K. · Maiolino, R. · Malaguti, G. · Marconi, A. · Perola, G. C.
Original · EN
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 Nₕ=2*10²⁴ cm⁻². The 2-10 keV X-ray luminosity >10⁴⁴ erg s⁻¹ definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical Lₓ/Lbol 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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