Interpretation of K Emission Line Profile

Iron K Line Emission in Agn: Observations

Iron Kα lines are key diagnostics of the central regions of AGN. Their profiles indicate that they are formed deep in the potential well of the central black hole, where extreme broadening and red shift occur. The profiles are most easily reproducible in an accretion disk: the lack of significant emission blue-ward of the rest energy is difficult produce in other geometries. In one source an ap...

Balmer emission - line profile variations in NGC 4593

We present results of a variability campaign of Balmer line profiles inNGC 4593. The continuumand the broad emission line intensities varied up to 50 per cent during the observing period. The rms profiles of the Balmer lines as well as the difference line profiles can be described by a limited number of strong components only: a central component and two to four outer components which are locat...

Emission line profile shapes from anisotropic resonance line scattering in planar equatorial disks

The consequences of anisotropic resonance line scattering for the emission profiles of equatorial disks are considered. In particular the opportunity to infer the disk velocity field owing to the anisotropic scattering is discussed. Analytic expressions for the profile shapes are derived for the cases of constant expansion and rotation, and numerical results are given for more realistic disk ve...

Measurement and interpretation of the polarization of the x-ray line emission of heliumlike Fe

The linear polarization of the 1s2p P1→1s S0 resonance line, the 1s2p P1,2→1s S0 intercombination lines, and the 1s2s S1→1s S0 forbidden line was measured in heliumlike Fe XXV excited near threshold by a monoenergetic electron beam. The measurement was carried out with a high-resolution x-ray spectrometer employing a set of two analyzing crystals that acted as polarizers by selectively reflecti...

Line-Scan Imagery Interpretation