Hydrodynamical Modeling of Large Circumstellar Disks

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00088337" target="_blank" >RIV/00216224:14310/16:00088337 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Hydrodynamical Modeling of Large Circumstellar Disks
Original language description
Direct centrifugal ejection from a critically or near-critically rotating surface forms a gaseous equatorial decretion disk. Anomalous viscosity provides the efficient mechanism for transporting the angular momentum outwards. The outer part of the disk can extend up to a very large distance from the parent star. We study the evolution of density, radial and azimuthal velocity, and angular momentum loss rate of equatorial decretion disks out to very distant regions. We investigate how the physical characteristics of the disk depend on the distribution of temperature and viscosity. We also study the magnetorotational instability, which is considered to be the origin of anomalous viscosity in outflowing disks. We use analytical calculations to study the stability of outflowing disks submerged to the magnetic field. At large radii the instability disappears in the region where the disk orbital velocity is roughly equal to the sound speed.
Czech name
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Czech description
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Project
<a href="/en/project/GA13-10589S" target="_blank" >GA13-10589S: Mass loss in hot massive stars</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Bright Emissaries: Be Stars as Messengers of Star-Disk Physics
ISBN
9781583818961
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
149-156
Publisher name
Astronomical Society of the Pacific
Place of publication
San Francisco, USA
Event location
The University of Western Ontario London, Ontari
Event date
Aug 10, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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