26 citations · 86 across the 12 of their papers we have counts for
7 papers · 1 filter
Models of hot star decretion disks
Petr Kurfürst
Massive stars can during their evolution reach the phase of critical (or very rapid, near-critical) rotation when further increase in rotation rate is no longer kinematically allow…
Intrinsic polarization of Wolf-Rayet stars due to the rotational modulation of the stellar wind
S. Abdellaoui, J. Krtička, P. Kurfürst
Fast rotating Wolf-Rayet stars are expected to be progenitors of long duration gamma-ray bursts. However, the observational test of this model is problematic. Spectral lines of Wol…
Two-dimensional modeling of density and thermal structure of dense circumstellar outflowing disks
Petr Kurfürst, Achim Feldmeier, Jiří Krtička
Context. Evolution of massive stars is affected by a significant loss of mass either via (nearly) spherically symmetric stellar winds or by aspherical mass-loss mechanisms, namely…
Torsional oscillations and observed rotational period variations in early-type stars
J. Krticka, Z. Mikulasek, G. W. Henry +2
Some chemically peculiar stars in the upper main sequence show rotational period variations of unknown origin. We propose these variations are a consequence of the propagation of i…
Magnetorotational instability in decretion disks of critically rotating stars and the outer structure of Be and Be/X-ray disks
Jiri Krticka, Petr Kurfurst, Iva Krtickova
Evolutionary models of fast-rotating stars show that the stellar rotational velocity may approach the critical speed. Critically rotating stars cannot spin up more, therefore they…
Time-dependent modeling of extended thin decretion disks of critically rotating stars
Petr Kurfürst, Achim Feldmeier, Jiří Krtička
During their evolution massive stars can reach the phase of critical rotation when a further increase in rotational speed is no longer possible. Direct centrifugal ejection from a…
Models of extended decretion disks of critically rotating stars
Petr Kurfürst, Achim Feldmeier, Jiří Krtička
Massive stars may during their evolution reach the phase of critical rotation when the further increase in rotational speed is no longer possible. The ejection of matter in the equ…