The magnetic prandtl number on structure of hot and cold accretion flows
| Autor: | Mahmoud Gholipour |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Accretion (meteorology) 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Rossby wave Astronomy and Astrophysics Mechanics Astrophysics 01 natural sciences Instability Physics::Fluid Dynamics Intermediate polar Space and Planetary Science Bipolar outflow 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Boundary value problem Magnetic Prandtl number Magnetohydrodynamics 010303 astronomy & astrophysics Instrumentation Astrophysics::Galaxy Astrophysics |
| Zdroj: | New Astronomy. 57:43-50 |
| ISSN: | 1384-1076 |
| DOI: | 10.1016/j.newast.2017.06.005 |
| Popis: | The aim of this work is to investigate the effect of the presence of a magnetic Prandtl number on the structure of an accretion flow with a bipolar outflow by focusing on the density structure. Two cold and hot classes are considered for accretion flows. According to the self-similar assumptions in the radial direction and boundary conditions as well, we solve the MHD equations along the θ-direction to obtain the density structure. In addition, we consider the results in two gas-pressure-dominated and radiation-pressure-dominated regions. The obtained results show that the existence of a magnetic prandtl number may lead to bump formation in hot accretion flows, which may have consequences for planet formation. Furthermore, some discontinuations in the density structure are seen at some regions resulting in the production of a gap in the case of cold accretion flows. The results of this work may be useful in the consideration of the Rossby wave instability in both classes of accretion flows. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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