BeppoSAX detection of the Fe K line in the nearby starburst galaxy NGC 253

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dc.creatorPersic, M.
dc.creatorMariani, S.
dc.creatorCappi, M.
dc.creatorBassani, L.
dc.creatorDanese, L.
dc.creatorDean, A. J.
dc.creatorDi Cocco, G.
dc.creatorFranceschini, A.
dc.creatorHunt, L. K.
dc.creatorMatteucci, F.
dc.creatorPalazzi, E.
dc.creatorPalumbo, G. G. C.
dc.creatorRephaeli, Y.
dc.creatorSalucci, P.
dc.creatorSpizzichino, A.
dc.date1998-09-21
dc.date.accessioned2026-07-07T02:28:00Z
dc.date.available2026-07-07T02:28:00Z
dc.descriptionWe present BeppoSAX results on the nearby starburst galaxy NGC 253. Although extended, a large fraction of the X-ray emission comes from the nuclear region. Preliminary analysis of the LECS/MECS/PDS ~0.2-60 keV data from the central 4' region indicates that the continuum is well fitted by two thermal models: a ``soft'' component with kT ~ 0.9 keV, and a ``hard'' component with kT ~ 6 keV absorbed by a column density of ~ 1.2 x10**22 cm-2. For the first time in this object, the Fe K line at 6.7 keV is detected, with an equivalent width of ~ 300 eV. This detection, together with the shape of the 2--60 keV continuum, implies that most of the hard X-ray emission is thermal in origin, and constrains the iron abundances of this component to be ~0.25 of solar. Other lines clearly detected are Si, S and Fe L/Ne, in agreement with previous ASCA results. We discuss our results in the context of the starburst-driven galactic superwind model.
dc.descriptionLaTeX file (6 pages), 2 ps figures, accepted for publications in Astronomy & Astrophysics Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/9809256
dc.identifierhttp://arxiv.org/abs/astro-ph/9809256
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12934
dc.subjectAstrophysics
dc.titleBeppoSAX detection of the Fe K line in the nearby starburst galaxy NGC 253
dc.typetext

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