Hot accretion flows in low-luminosity active galactic nuclei in NGC 4258 and NGC 7213

Abstract

We study the high energy emission of two active galactic nuclei (AGN), NGC 4258 and NGC 7213. We directly apply the general-relativistic (GR) hot flow model, kerrflow, to the archival BeppoSAX, NuSTAR and Suzaku observations of these objects. Most of these data sets indicate that about 10-20 per cent of the accretion power is used for the direct heating of electrons, however, we find also indications for significant changes of the electron heating efficiency in some cases. Furthermore, all these X-ray data sets indicate rather strongly magnetized flows, with the magnetic field close to the equipartition with the gas pressure. Comparison of the model prediction with the Fermi/LAT data for NGC 7213 allows us to constrain the content of nonthermal protons to at most 10 per cent.

Accepted (MNRAS)

References in corpus (8)

• IACHEC Cross-Calibration of Chandra, NuSTAR, Swift, Suzaku, and XMM-Newton with 3C 273 and PKS 2155-304
• A BLR origin for the iron K$\alpha$ line in NGC7213
• The variable and non-variable X-ray absorbers in Compton-thin type-II Active Galactic Nuclei
• Evolution of the accretion disk around the supermassive black hole of NGC 7213
• A luminous hot accretion flow in the low-luminosity active galactic nucleus NGC 7213
• On the role and origin of nonthermal electrons in hot accretion flows
• A comprehensive X-ray view of the active nucleus in NGC 4258
• Improved model of X-ray emission from hot accretion flows

Cited by in corpus (1)

• A Cigale module tailored (not only) for Low-Luminosity AGN