Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-12-05
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures, Contributed talk at "X-ray Astronomy 2000" meeting, Palermo, Italy, Sept. 2000. Proceedings to be publishe
Scientific paper
A Chandra AO1 30ks HETGS observation of the X-ray transient micro-quasar GRS 1915+105 reveals absorption edges and faint line emission over the HETG energy range. We find from a preliminary analysis evidence for prominent neutral K edges associated with iron, silicon, magnesium, and tentatively sulphur. The column densities assuming solar abundances are consistent with ~ few x $10^{22} cm^{-2}$ in excess of the Galactic value, and may point to surrounding cold material associated with GRS 1915+105. Neutral Fe K$\alpha$ emission, and ionized absorption from Fe XXV and Fe XXVI are resolved. We limit our discussion to the Chandra results.
Blackman Eric G.
Fabian Andrea C.
Lee Jae-Chul
Reynolds Chris S.
Schulz Norbert S.
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