Transient Relativistically-Shifted Lines as a Probe of Black Hole Systems

Abstract

X-ray spectra of Seyfert galaxies have revealed a new type of X-ray spectral feature, one which appears to offer important new insight into the black hole system. XMM/Chandra revealed several narrow emission lines redward of Fe Kalpha in NGC 3516. Since that discovery the phenomenon has been observed in other Seyfert galaxies, e.g. NGC 7314 and ESO 198-G24. We present new evidence for a redshifted Fe line in XMM spectra of Mrk 766. These data reveal the first evidence for a significant shift in the energy of such a line, occurring over a few tens of kiloseconds. This shift may be interpreted as deceleration of an ejected blob of gas traveling close to the escape velocity.

arXiv comment13 pages, 5 figures (4 color) accepted by ApJ

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• How the effects of resonant absorption on black hole reflection spectra can mimic high-velocity outflows
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• The relativistic shift of narrow spectral features from black-hole accretion discs
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• Rms variability properties of the iron K alpha line in Seyfert galaxies
• An extreme gravitationally redshifted iron line at 4.8 keV in Mrk 876
• Anisotropic X-ray emission in AGN accretion discs
• An XMM-Newton view of the X-ray flat radio-quiet quasar PG 1416-129
• The Additional Line Component within the Iron KαProfile in MCG-6-30-15: Evidence for Blob Ejection?
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