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The Kinematics and Physical Conditions of the Ionized Gas in NGC 4593 from Chandra High‐Energy Grating Spectroscopy

  • Authors: Barry McKernan, Tahir Yaqoob, Ian M. George, and T. J. Turner

McKernan et al. 2003 The Astrophysical Journal 593 142.

  • Provider: AAS Journals

Caption: Fig. 11.

Best‐fitting XSTAR (v.2.1.h) photoionization model spectrum fitted to the MEG and HEG data as described in § 5 (see also Fig. 3). The ionization parameter is ﹩\mathrm{log}\,\xi =2.52﹩ ergs cm s−1, and ﹩N_{\mathrm{H}\,}=5.37\times 10^{21}﹩ cm−2. The intrinsic continuum is a broken power law. A fitted neutral Fe edge at 0.708 keV and Galactic absorption are also included. The purpose of this plot is to show the effects of the instrumental effective area, especially where it changes abruptly. Note that this spectrum is for ﹩b=1﹩ km s−1 so the equivalent widths of absorption features are limited by the energy resolution of XSTAR and are not as accurate as those computed for Figs. 7 and 8 (to which the reader should refer for details of the absorption features). Full details and other parameters can be found in the text (in § 3 and § 5).

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