Angular momentum transport in protostellar discs
Article
Salmeron, Raquel, Konigl, Arieh and Wardle, Mark. 2007. "Angular momentum transport in protostellar discs." Monthly Notices of the Royal Astronomical Society. 375 (1), pp. 177-183. https://doi.org/10.1111/j.1365-2966.2006.11277.x
| Article Title | Angular momentum transport in protostellar discs |
|---|---|
| ERA Journal ID | 1074 |
| Article Category | Article |
| Authors | Salmeron, Raquel (Author), Konigl, Arieh (Author) and Wardle, Mark (Author) |
| Journal Title | Monthly Notices of the Royal Astronomical Society |
| Journal Citation | 375 (1), pp. 177-183 |
| Number of Pages | 7 |
| Year | 2007 |
| Publisher | Oxford University Press |
| Place of Publication | United Kingdom |
| ISSN | 0035-8711 |
| 1365-2966 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1365-2966.2006.11277.x |
| Web Address (URL) | https://academic.oup.com/mnras/article/375/1/177/986677 |
| Abstract | Angular momentum transport in protostellar discs can take place either radially, through turbulence induced by the magnetorotational instability (MRI), or vertically, through the torque exerted by a large-scale magnetic field that threads the disc. Using semi-analytic and numerical results, we construct a model of steady-state discs that includes vertical transport by a centrifugally driven wind as well as MRI-induced turbulence. We present approximate criteria for the occurrence of either one of these mechanisms in an ambipolar diffusion-dominated disc. We derive 'strong field' solutions in which the angular momentum transport is purely vertical and 'weak field' solutions that are the stratified-disc analogues of the previously studied MRI channel modes; the latter are transformed into accretion solutions with predominantly radial angular momentum transport when we implement a turbulent-stress prescription based on published results of numerical simulations. We also analyse 'intermediate field strength' solutions in which both modes of transport operate at the same radial location; we conclude, however, that significant spatial overlap of these two mechanisms is unlikely to occur in practice. To further advance this study, we have developed a general scheme that incorporates also the Hall and Ohm conductivity regimes in discs with a realistic ionization structure. |
| Keywords | Accretion, accretion discs; ISM: jets and outflows; MHD; Stars: formation |
| ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
| Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2007 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Byline Affiliations | Australian National University |
| University of Chicago, United States | |
| Macquarie University | |
| Institution of Origin | University of Southern Queensland |
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