We discuss the iron K line complex in NGC 1068. The line complex basically consists of three components, as previously reported. A new analysis of the ASCA data shows that cold reflection appears to dominate the observed X-ray emission above 4 keV based on the detection of 'Compton shoulder', a weak red wing of the 6.4 keV fluorescence iron K line, and a very flat continuum. The other two weaker lines at higher energies can be identified with FeXXV and FeXXVI and suggest an highly ionized X-ray mirror as well, although the line energies are systematically lower than those expected from the resonant lines, consistent with a redshift by 1.5%.
Iwasawa K, Fabian AC, & Matt G (1997). X-ray spectroscopy of the scattered emission in NGC 1068. ASTROPHYSICS AND SPACE SCIENCE, 248(1-2), 199-206.
Titolo: | X-ray spectroscopy of the scattered emission in NGC 1068 |
Autori: | |
Data di pubblicazione: | 1997 |
Rivista: | |
Citazione: | Iwasawa K, Fabian AC, & Matt G (1997). X-ray spectroscopy of the scattered emission in NGC 1068. ASTROPHYSICS AND SPACE SCIENCE, 248(1-2), 199-206. |
Abstract: | We discuss the iron K line complex in NGC 1068. The line complex basically consists of three components, as previously reported. A new analysis of the ASCA data shows that cold reflection appears to dominate the observed X-ray emission above 4 keV based on the detection of 'Compton shoulder', a weak red wing of the 6.4 keV fluorescence iron K line, and a very flat continuum. The other two weaker lines at higher energies can be identified with FeXXV and FeXXVI and suggest an highly ionized X-ray mirror as well, although the line energies are systematically lower than those expected from the resonant lines, consistent with a redshift by 1.5%. |
Handle: | http://hdl.handle.net/11590/147274 |
Appare nelle tipologie: | 1.1 Articolo in rivista |