High-resolution X-ray imaging and spectroscopy of the core of NGC 4945 with XMM-Newton and Chandra
作者： R. S. Warwick , T. P. Roberts , N. J. Schurch
DOI: 10.1046/J.1365-8711.2002.05585.X
关键词:
摘要: We utilize the complementary capabilities of XMM-Newton and Chandra to conduct a detailed imaging spectral study nearby galaxy NGC 4945 focusing on its nucleus immediate surroundings (within ∼1 kpc nucleus). A complex morphology is revealed including predominantly hard, but partially resolved, nuclear source plus spectrally soft, conically shaped X-ray 'plume', which extends 30 arcsec (500 pc) north-west. In our direct view active galactic (AGN) blocked below ∼10 keV by extremely heavy line-of-sight absorption, observed spectrum dominated multi-temperature thermal emission associated with starburst plume. Nevertheless signature AGN present in form neutral Compton reflection component 6.4 fluorescent iron Kα line. conjecture that site continuum reprocessing far wall highly inclined molecular torus, geometry consistent presence H 2 O megamaser this source. The soft (∼0.6 keV) limb-brightened appearance plume suggest an interpretation terms mass-loaded superwind emanating from starburst.
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