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| rdf:type
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| Description
| - In this work we use the radiation hydrodynamic code TRAMP to perform a two-dimensional axially symmetric model of the layered disc. Using this model we follow the accumulation of mass in the dead zone due to the radially varying accretion rate. We found a new type of instability which causes the dead zone to split into rings. This %22ring instability%22 works due to the positive feedback between the thickness of the dead zone and the mass accumulation rate. We give an analytical description of this instability, taking into account non-zero thickness of the dead zone and deviations from the Keplerian rotational velocity. The analytical model agrees reasonably well with results of numerical simulations. Finally, we speculate about the possible role of the ring instability in protoplanetary discs and in the formation of planets.
- In this work we use the radiation hydrodynamic code TRAMP to perform a two-dimensional axially symmetric model of the layered disc. Using this model we follow the accumulation of mass in the dead zone due to the radially varying accretion rate. We found a new type of instability which causes the dead zone to split into rings. This %22ring instability%22 works due to the positive feedback between the thickness of the dead zone and the mass accumulation rate. We give an analytical description of this instability, taking into account non-zero thickness of the dead zone and deviations from the Keplerian rotational velocity. The analytical model agrees reasonably well with results of numerical simulations. Finally, we speculate about the possible role of the ring instability in protoplanetary discs and in the formation of planets. (en)
- V teto praci pouzivame zarive hydrodynamicky kod TRAMP k vytvoreni dvourozmerneho osove symetrickeho modelu vrstveneho disku. Za pouziti tohoto modelu sledujeme akumulaci hmoty v mrtve zone diky radialne promenlivemu tempu akrece. Nalezli jsme novy typ nestability, ktera zpusobuje, ze se mrtva zona rozdeli na prstence. Tato %22prstencova nestabilita%22 funguje diky pozitivni zpetne vazbe mezi tloustkou mrtve zony a rychlosti akumulace hmoty. Uvadime analyticky popis teto nestability, ve kterem bereme v uvahu nenulovou tloustku mrtve zony a odchylky od Keplerovske rotacni rychlosti. Analyticky model se v rozumne mire shoduje s numerickymi simulacemi. Na zaver spekulujeme o mozne roli prstencove nestability v protoplanetarnich discich a pri tvorbe planet. (cs)
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| Title
| - Two-dimensional models of layered protoplanetary discs. I. - The ring instability
- Two-dimensional models of layered protoplanetary discs. I. - The ring instability (en)
- Dvourozměrné modely vrstvených protoplanetárních disků. I. - Prstencová nestabilita (cs)
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| skos:prefLabel
| - Two-dimensional models of layered protoplanetary discs. I. - The ring instability
- Two-dimensional models of layered protoplanetary discs. I. - The ring instability (en)
- Dvourozměrné modely vrstvených protoplanetárních disků. I. - Prstencová nestabilita (cs)
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| skos:notation
| - RIV/67985815:_____/05:00024760!RIV06-AV0-67985815
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(IAB3003106), Z(AV0Z10030501)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/67985815:_____/05:00024760
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - accretion, accretion discs; hydrodynamics; instabilities; Solar system: formation (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Monthly Notices of the Royal Astronomical Society
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Wünsch, Richard
- Klahr, Hubert
- Rozyczka, Michal
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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