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High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. II. Patchy corona model (2004)
Journal Article
Sobolewska, M., Siemiginowska, A., & Zycki, P. (2004). High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. II. Patchy corona model. Astrophysical Journal, 617(1), 102-112. https://doi.org/10.1086/425262

We modeled the spectral energy distribution of high-redshift radio-quiet quasars (high-z RQQs). We computed spectra in a patchy corona geometry in which an accretion disk extends to the last stable orbit and the Comptonizing active regions (hot cloud... Read More about High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. II. Patchy corona model.

High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. I. Hot semispherical flow (2004)
Journal Article
Sobolewska, M., Siemiginowska, A., & Zycki, P. (2004). High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. I. Hot semispherical flow. Astrophysical Journal, 608(1), 80-94. https://doi.org/10.1086/392529

Two families of models are currently considered to describe an accretion flow onto black holes and production of the observed X-ray radiation: (1) a standard cold accretion disk with a hot corona above it and (2) an outer truncated accretion disk wit... Read More about High-redshift radio-quiet quasars: Exploring the parameter space of accretion models. I. Hot semispherical flow.