High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN

Understand

We present a high density disc reflection spectral analysis of a sample of 17 Seyfert 1 galaxies to study the inner disc densities at different black hole mass scales and accretion rates.

• All the available XMM-Newton observations in the archive are used.
• OM observations in the optical/UV band are used to estimate their accretion rates.
• We find that 65% of sources in our sample show a disc density significantly higher than 1e15 cm^{-3}, which was assumed in previous reflection-based spectral analyses.