Radial and vertical angular momentum transport in protostellar discs
Article
Article Title | Radial and vertical angular momentum transport in protostellar discs |
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ERA Journal ID | 1059 |
Article Category | Article |
Authors | Salmeron, Raquel (Author), Konigl, Arieh (Author) and Wardle, Mark (Author) |
Journal Title | Astrophysics and Space Science: an international journal of astronomy, astrophysics and space science |
Journal Citation | 311 (1-3), pp. 81-85 |
Number of Pages | 5 |
Year | 2007 |
Publisher | Springer |
Place of Publication | Netherlands |
ISSN | 0004-640X |
1572-946X | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s10509-007-9563-z |
Web Address (URL) | https://link.springer.com/article/10.1007/s10509-007-9563-z |
Abstract | Angular momentum in protostellar discs can be transported either radially, through turbulence induced by the magnetorotational instability (MRI), or vertically, through the torque exerted by a large-scale magnetic field. We present a model of steady-state discs where these two mechanisms operate at the same radius and derive approximate criteria for their occurrence in an ambipolar diffusion dominated disc. We obtain 'weak field' solutions-which we associate with the MRI channel modes in a stratified disc-and transform them into accretion solutions with predominantly radial angular-momentum transport by implementing a turbulent-stress prescription based on published results of numerical simulations. We also analyze 'intermediate field strength' solutions in which both radial and vertical transport operate at the same radial location. Our results suggest, however, that this overlap is unlikely to occur in real discs. |
Keywords | Accretion; Accretion discs; ISM: jets and outflows; MHD; Stars: formation |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Australian National University |
University of Chicago, United States | |
Macquarie University | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q735z/radial-and-vertical-angular-momentum-transport-in-protostellar-discs
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