Narrow Components within the F[CLC]e[/CLC] Kα Profile of NGC 3516: Evidence of the Importance of General Relativistic Effects?

Abstract

We present results from a simultaneous Chandra High Energy Transmission Grating and XMM-Newton observation of NGC 3516. We find evidence of several narrow components of Fe Ka along with a broad line. We consider the possibility that the lines arise in a blob of material ejected from the nucleus with velocity ∼0.25c. We also consider an origin in a neutral accretion disk, suffering enhanced illumination at 35 and 175 , perhaps R R g g as a result of magnetic reconnection. The presence of these narrow features indicates there is no Comptonizing region along the line of sight to the nucleus. This in turn is compelling support for the hypothesis that broad Fe Ka components are, in general, produced by strong gravity.