504 citations · 5.2k across the 62 of their papers we have counts for
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Thin Disk Theory with a Non-Zero Torque Boundary Condition and Comparisons with Simulations
Robert F. Penna, Aleksander Sadowski, Jonathan C. McKinney
We present an analytical solution for thin disk accretion onto a Kerr black hole that extends the standard Novikov-Thorne alpha-disk in three ways: (i) it incorporates nonzero stre…
Slim accretion disks around black holes
A. Sadowski
In this thesis, I study hydrodynamical models of slim accretion disks --- advective, optically thick disks which generalize the standard models of radiatively efficient thin disks…
Stability of radiation-pressure dominated disks. I. The dispersion relation for a delayed heating alpha-viscosity prescription
Adam Ciesielski, Maciej Wielgus, Wlodek Kluzniak +4
We derive and investigate the dispersion relation for accretion disks with retarded or advanced heating. We follow the alpha-prescription but allow for a time offset (τ) between he…
Testing slim-disk models on the thermal spectra of LMC X-3
Odele Straub, Michal Bursa, Aleksander Sadowski +6
Slim-disk models describe accretion flows at high luminosities, while reducing to the standard thin disk form in the low luminosity limit. We have developed a new spectral model, s…
Studies of Thermally Unstable Accretion Disks around Black Holes with Adaptive Pseudospectral Domain Decomposition Method. II. Limit-Cycle Behavior in accretion disks around Kerr black holes
Li Xue, Aleksander Sądowski, Marek A. Abramowicz +1
For the first time ever, we derive equations governing the time-evolution of fully relativistic slim accretion disks in the Kerr metric, and numerically construct their detailed no…
From X-ray dips to eclipse: Witnessing disk reformation in the recurrent nova USco
J. -U. Ness, B. E. Schaefer, A. Dobrotka +9
The 10th recorded outburst of the recurrent eclipsing nova USco was observed simultaneously in X-ray, UV, and optical by XMM-Newton on days 22.9 and 34.9 after outburst. Two full p…