We present a new X-ray spectroscopic study of 22 luminous (2× 10 45≲ L bol/erg s− 1≲ 2×
10 46) active galactic nuclei (AGNs) at intermediate redshifts (0.1≲ z≲ 0.4), as part of the …

A soft X-ray excess above the 2–10 keV power-law extrapolation is generally observed in
the X-ray spectra of active galactic nuclei. The origin of this excess is still not well …

Context. Warm coronas offer a plausible explanation behind the soft X-ray excess in active
galactic nuclei (AGNs). This paper presents the self-consistent modeling of an accretion disk …

The soft X-ray excess–the excess of X-rays below 2 keV with respect to the extrapolation of
the hard X-ray spectral continuum model–is a very common feature among type 1 active …

Context. Detections of the X-ray spectra of active galactic nuclei (AGNs) typically reveal a
noticeable excess of soft X-rays beyond the extrapolation of the power-law trend observed …

Context. The primary X-ray emission in active galactic nuclei (AGNs) is widely believed to be
due to Comptonisation of the thermal radiation from the accretion disc in a corona of hot …

Aims. We test the two-corona accretion scenario for active galactic nuclei in the case of the
“bare” Seyfert 1 galaxy HE 1143-1810. Methods. We perform a detailed study of the broad …

Bright active galaxies show a range of properties, but many of these properties are
correlated, which has led to the concept of the quasar main sequence. We test whether our …

The X-ray spectra of active galactic nuclei (AGNs) often exhibit an excess of emission above
the primary power law at energies≲ 2 keV. Two models for the origin of this 'soft excess' are …

Context. Joint XMM-Newton and NuSTAR multiple exposures allow us to disentangle the
different emission components of active galactic nuclei (AGNs) and to study the evolution of …