We have performed a detailed analysis of the XMM-Newton observation of IGR J16318-4848, to study the properties of the matter responsible for the obscuration and for the emission of Fe and Ni lines. Even if the line-of-sight material has a column density of about 2x10(24) m(-2), from the Fe Kalpha line EW and Compton Shoulder we argue that the matter should have an average column density of a few x10(23) cm(-2), along with a covering factor of about 0.1-0.2. The iron Kalpha line varies on time-scales as short as 1000 s, implying a size of the emitting region smaller than about 3x10(13) cm. The flux of the line roughly follows the variations of the continuum, but not exactly, suggesting a variation of the geometrical properties of the emitting region on similar time-scales.
Matt, G., Guainazzi, M. (2003). The properties of the absorbing and line-emitting material in IGR J16318-4848. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 341(3), L13-L17 [10.1046/j.1365-8711.2003.06658.x].
The properties of the absorbing and line-emitting material in IGR J16318-4848
MATT, Giorgio;
2003-01-01
Abstract
We have performed a detailed analysis of the XMM-Newton observation of IGR J16318-4848, to study the properties of the matter responsible for the obscuration and for the emission of Fe and Ni lines. Even if the line-of-sight material has a column density of about 2x10(24) m(-2), from the Fe Kalpha line EW and Compton Shoulder we argue that the matter should have an average column density of a few x10(23) cm(-2), along with a covering factor of about 0.1-0.2. The iron Kalpha line varies on time-scales as short as 1000 s, implying a size of the emitting region smaller than about 3x10(13) cm. The flux of the line roughly follows the variations of the continuum, but not exactly, suggesting a variation of the geometrical properties of the emitting region on similar time-scales.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
