Strongly absorbed quiescent X-ray emission from the X-ray transient XTE J0421+56
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We have observed the soft X-ray transient XTE J0421+56 in quiescence with XMM-Newton. The observed spectrum is highly unusual being dominated by a broad feature at 6.5 keV and can be modeled by a strongly absorbed continuum. The spectra of X-ray transients observed so far are normally modeled using Advection Dominated Accretion Flow models, black-bodies, power-laws, or by the thermal emission from a neutron star surface. The strongly absorbed X-ray emission of XTE J0421+56 could result from the compact object being embedded within the dense circumstellar wind emitted from the supergiant B[e] companion star.
To appear in the proceedings of the `New Visions of the Universe in the XMM-Newton and Chandra Era' symposium held in ESTEC, The Netherlands, on 26-30 November 2001; ESA SP-488, August 2002, eds F. Jansen
To appear in the proceedings of the `New Visions of the Universe in the XMM-Newton and Chandra Era' symposium held in ESTEC, The Netherlands, on 26-30 November 2001; ESA SP-488, August 2002, eds F. Jansen