Open Access
Monthly Notices of the Royal Astronomical Society, volume 504, issue 3, pages 4589-4598
New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions
Korolkov Sergey
1, 2
,
Izmodenov Vlad
1, 2, 3
Publication type: Journal Article
Publication date: 2021-04-21
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 4.8
ISSN: 00358711, 13652966
Space and Planetary Science
Astronomy and Astrophysics
Abstract
ABSTRACT
The astropause (heliopause for the Sun) is the tangential discontinuity separating the stellar wind from the interstellar plasma. The global shape of the heliopause is a matter of debates. Two types of the shape are under discussion: comet-like and tube-like. In the second type, the two-jets oriented towards the stellar rotation axis are formed by the action of azimuthal component of the stellar magnetic field. We explore a simplified global astrosphere in which (1) the surrounding and moving with respect to the star circumstellar medium is fully ionized, (2) the interstellar magnetic field is neglected, (3) the radial component of the stellar magnetic field is neglected as compared with the azimuthal component, and (4) the stellar wind outflow is spherically symmetric and supersonic. We present the results of numerical 3D MHD modelling and explore how the global structure depends on the gas-dynamic Mach number of the interstellar flow, M∞, and the Alfvenic Mach number in the stellar wind. It is shown that the astropause has a tube-like shape for small values of M∞. The wings of the tube are distorted towards the tail as larger as larger the Mach number is. The new (to our knowledge) result is the reverse interstellar flow in the vicinity of the astropause in the tail. The larger the interstellar Mach number is the narrower the reverse flow is. At some values of the Mach number, the stellar wind overcomes the reverse interstellar flow and moves out in downwind. In this regime, the astropause changes its topology from tube-like to sheet-like.
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Citations by publishers
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Korolkov S. et al. New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions // Monthly Notices of the Royal Astronomical Society. 2021. Vol. 504. No. 3. pp. 4589-4598.
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Korolkov S., Izmodenov V. New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions // Monthly Notices of the Royal Astronomical Society. 2021. Vol. 504. No. 3. pp. 4589-4598.
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TY - JOUR
DO - 10.1093/mnras/stab1071
UR - https://doi.org/10.1093%2Fmnras%2Fstab1071
TI - New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions
T2 - Monthly Notices of the Royal Astronomical Society
AU - Korolkov, Sergey
AU - Izmodenov, Vlad
PY - 2021
DA - 2021/04/21 00:00:00
PB - Oxford University Press
SP - 4589-4598
IS - 3
VL - 504
SN - 0035-8711
SN - 1365-2966
ER -
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@article{2021_Korolkov,
author = {Sergey Korolkov and Vlad Izmodenov},
title = {New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions},
journal = {Monthly Notices of the Royal Astronomical Society},
year = {2021},
volume = {504},
publisher = {Oxford University Press},
month = {apr},
url = {https://doi.org/10.1093%2Fmnras%2Fstab1071},
number = {3},
pages = {4589--4598},
doi = {10.1093/mnras/stab1071}
}
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Korolkov, Sergey, et al. “New unexpected flow patterns in the problem of the stellar wind interaction with the interstellar medium: stationary ideal-MHD solutions.” Monthly Notices of the Royal Astronomical Society, vol. 504, no. 3, Apr. 2021, pp. 4589-4598. https://doi.org/10.1093%2Fmnras%2Fstab1071.