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Impact of the Hall effect in star formation : improving the angular momentum conservation
- Source :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 631, pp.A66. ⟨10.1051/0004-6361/201936215⟩, Astronomy and Astrophysics-A&A, 2019, 631, pp.A66. ⟨10.1051/0004-6361/201936215⟩
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- We present here a minor modification of our numerical implementation of the Hall effect for the 2D Riemann solver used in Constrained Transport schemes, as described in Marchand et al. (2018). In the previous work, the tests showed that the angular momentum was not conserved during protostellar collapse simulations, with significant impact. By removing the whistler waves speed from the characteristic speeds of non-magnetic variables in the 1D Riemann solver, we are able to improve the angular momentum conservation in our test-case by one order of magnitude, while keeping the second-order numerical convergence of the scheme. We also reproduce the simulations of Tsukamoto et al. (2015) with consistent resistivities, the three non-ideal MHD effects and initial rotation, and agree with their results. In this case, the violation of angular momentum conservation is negligible in regard to the total angular momentum and the angular momentum of the disk.<br />Comment: 6 pages, 6 figures, published in A&A
- Subjects :
- Angular momentum
010504 meteorology & atmospheric sciences
Whistler
FOS: Physical sciences
Astrophysics
Rotation
01 natural sciences
symbols.namesake
Total angular momentum quantum number
0103 physical sciences
Magnetohydrodynamic drive
010303 astronomy & astrophysics
ComputingMilieux_MISCELLANEOUS
Solar and Stellar Astrophysics (astro-ph.SR)
0105 earth and related environmental sciences
Physics
[PHYS]Physics [physics]
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
Star formation
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Astronomy and Astrophysics
Riemann solver
Computational physics
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
symbols
Order of magnitude
Subjects
Details
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 631, pp.A66. ⟨10.1051/0004-6361/201936215⟩, Astronomy and Astrophysics-A&A, 2019, 631, pp.A66. ⟨10.1051/0004-6361/201936215⟩
- Accession number :
- edsair.doi.dedup.....24ba860b24c3986299c0cc5a69725ace
- Full Text :
- https://doi.org/10.48550/arxiv.1909.09025