TY  - GEN
A1  - Kurfürst, P.
A1  - Feldmeier, Achim
A1  - Krtička, Jiri
T1  - Modeling sgB[e] Circumstellar Disks
T2  - The B(e) Phenomenon: Forty Years of Studies : proceedings of a conference held at Charles University, Prague, Czech Republic, 27 June-1 July 2016
N2  - During their evolution, massive stars are characterized by a significant loss of mass either via spherically symmetric stellar winds or by aspherical mass-loss mechanisms, namely outflowing equatorial disks. However, the scenario that leads to the formation of a disk or rings of gas and dust around these objects is still under debate. Is it a viscous disk or an ouftlowing disk-forming wind or some other mechanism? It is also unclear how various physical mechanisms that act on the circumstellar environment of the stars affect its shape, density, kinematic, and thermal structure. We assume that the disk-forming mechanism is a viscous transport within an equatorial outflowing disk of a rapidly or even critically rotating star. We study the hydrodynamic and thermal structure of optically thick dense parts of outflowing circumstellar disks that may form around,e.g., Be stars, sgB[e] stars, or Pop m stars. We calculate self-consistent time dependent models of the inner dense region of the disk that is strongly affected either by irradiation from the central star and by contributions of viscous heating effects. We also simulate the dynamic effects of collision between expanding ejecta of supernovae and circumstellar disks that may be form in sgB[e] stars and, e.g., LBVs or Pop in stars.
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/56746
UR  - https://www.physics.muni.cz/~petrk/presentation.pdf
SN  - 978-1-58381-900-5
SN  - 978-1-58381-901-2
VL  - 508
SP  - 17
EP  - 22
PB  - Astronomical Scoeity of the Pacific
CY  - San Fransisco
ER  -