SIMBAD references

2013ApJ...763...75X - Astrophys. J., 763, 75 (2013/February-1)

The transition layer between the thin accretion disk and the hot Corona: constraints from the thermal X-ray line emission.

XU Y.-D.

Abstract (from CDS):

The observed continuum spectra in the low-luminosity active galactic nuclei, M81, can be reproduced by the advection-dominated accretion flow (ADAF)+thin disk/corona accretion flow model. We find that the best fit to the spectral energy distribution of M81 requires accretion rate {dot}m = 3 x 10–4 for R tr= 60 RS. The observed H-like and He-like iron lines may probably be emitted from the transition layer between the vertically connected hot corona and cold thin disk. We model a power-law function of height z for the electron temperature in the transition layer, and calculate the thermal H-like and He-like iron line emission from M81. Combining the observations with our results, we find that the thickness of the transition layer is ∼14%-23% of the thickness of the corona at the same radius. We discuss that the observed stronger H-like line emission than He-like line emission cannot be explained with the pure ADAF model. Our results provide useful constraints on the theoretical model for disk-corona connection.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: active - galaxies: individual: M81 - radiation mechanisms: thermal

Simbad objects: 5

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