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The properties of the absorbing and line emitting material in IGR J16318-4848 | | Giorgio Matt
; Matteo Guainazzi
; | | Date: |
28 Mar 2003 | | Journal: | Mon.Not.Roy.Astron.Soc. 341 (2003) L13 | | Subject: | astro-ph | | 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 cm^-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. | | Source: | arXiv, astro-ph/0303626 | | Services: | Forum | Review | PDF | Favorites | |
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