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Title: Comparing Poynting flux dominated magnetic tower jets with kinetic-energy dominated jets

Abstract

Magnetic towers represent one of two fundamental forms of MHD out flows. Driven by magnetic pressure gradients, these flows have been less well studied than magneto-centrifugally launched jets even though magnetic towers may well be as common. We present new results exploring the behavior and evolution of magnetic tower outflows and demonstrate their connection with pulsed power experimental studies and purely hydrodynamic jets which might represent the asymptotic propagation regimes of magneto-centrifugally launched jets. High-resolution AMR MHD simulations (using the AstroBEAR code) provide insights into the underlying physics of magnetic towers and help us constrain models of their propagation. Our simulations have been designed to explore the effects of thermal energy losses and rotation on both towerflows and their hydro counterparts. We find these parameters have significant effects on the stability of magnetic towers, but mild effects on the stability of hydro jets. Current-driven perturbations in the Poynting Flux Dominated (PDF) towers are shown to be amplified in both the cooling and rotating cases. Our studies of the long term evolution of the towers show that the formation of weakly magnetized central jets within the tower are broken up by these instabilities becoming a series of collimated clumps which magnetizationmore » properties vary over time. In addition to discussing these results in light of laboratory experiments, we address their relevance to astrophysical observations of young star jets and outflow from highly evolved solar type stars.« less

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [4]
+ Show Author Affiliations
  1. Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy
  2. Pierre and Marie Curie Univ., Paris (France). Paris Observatory (OP) and Lab. of Radiation and Matter Studies in Astrophysics and Atmospheres (LERMA); Higher Normal School, UMR 8112 CNRS, Paris (France)
  3. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
  4. Imperial College, London (United Kingdom). Blackett Lab.
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Space Telescope Science Inst., Baltimore, MD (United States); National Science Foundation (NSF); Cornell Univ., Ithaca, NY (United States)
OSTI Identifier:
1462542
Report Number(s):
DOE-Rice-2037-8
Journal ID: ISSN 1574-1818; PII: S1574181813000165; TRN: US1902187
Grant/Contract Number:  
NA0002037; HST-AR-11251.01-A; HST-AR-12128.01-A; AST-0807363; PHY0903797; SC0001063; 41843-7012; FC52-08NA28302
Resource Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Jets and outflows; Methods: numerical; Magnetic field; Supersonic shocks

Citation Formats

Huarte-Espinosa, M., Frank, A., Blackman, E. G., Ciardi, A., Hartigan, P., Lebedev, S. V., and Chittenden, J. P. Comparing Poynting flux dominated magnetic tower jets with kinetic-energy dominated jets. United States: N. p., 2013. Web. doi:10.1016/j.hedp.2013.01.010.
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Huarte-Espinosa, M., Frank, A., Blackman, E. G., Ciardi, A., Hartigan, P., Lebedev, S. V., & Chittenden, J. P. Comparing Poynting flux dominated magnetic tower jets with kinetic-energy dominated jets. United States. https://doi.org/10.1016/j.hedp.2013.01.010
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Huarte-Espinosa, M., Frank, A., Blackman, E. G., Ciardi, A., Hartigan, P., Lebedev, S. V., and Chittenden, J. P. Fri . "Comparing Poynting flux dominated magnetic tower jets with kinetic-energy dominated jets". United States. https://doi.org/10.1016/j.hedp.2013.01.010. https://www.osti.gov/servlets/purl/1462542.
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@article{osti_1462542,
title = {Comparing Poynting flux dominated magnetic tower jets with kinetic-energy dominated jets},
author = {Huarte-Espinosa, M. and Frank, A. and Blackman, E. G. and Ciardi, A. and Hartigan, P. and Lebedev, S. V. and Chittenden, J. P.},
abstractNote = {Magnetic towers represent one of two fundamental forms of MHD out flows. Driven by magnetic pressure gradients, these flows have been less well studied than magneto-centrifugally launched jets even though magnetic towers may well be as common. We present new results exploring the behavior and evolution of magnetic tower outflows and demonstrate their connection with pulsed power experimental studies and purely hydrodynamic jets which might represent the asymptotic propagation regimes of magneto-centrifugally launched jets. High-resolution AMR MHD simulations (using the AstroBEAR code) provide insights into the underlying physics of magnetic towers and help us constrain models of their propagation. Our simulations have been designed to explore the effects of thermal energy losses and rotation on both towerflows and their hydro counterparts. We find these parameters have significant effects on the stability of magnetic towers, but mild effects on the stability of hydro jets. Current-driven perturbations in the Poynting Flux Dominated (PDF) towers are shown to be amplified in both the cooling and rotating cases. Our studies of the long term evolution of the towers show that the formation of weakly magnetized central jets within the tower are broken up by these instabilities becoming a series of collimated clumps which magnetization properties vary over time. In addition to discussing these results in light of laboratory experiments, we address their relevance to astrophysical observations of young star jets and outflow from highly evolved solar type stars.},
doi = {10.1016/j.hedp.2013.01.010},
journal = {High Energy Density Physics},
number = 2,
volume = 9,
place = {United States},
year = {Fri Feb 08 00:00:00 EST 2013},
month = {Fri Feb 08 00:00:00 EST 2013}
}
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https://doi.org/10.1016/j.hedp.2013.01.010
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    Spectroscopic studies of the parameters of plasma jets during their propagation in the background plasma on the PF-3 facility
    journal, February 2017

    • Dan’ko, S. A.; Ananyev, S. S.; Kalinin, Yu G.
    • Plasma Physics and Controlled Fusion, Vol. 59, Issue 4
    • DOI: 10.1088/1361-6587/aa5904

    Simulation of Nonrelativistic Jet Ejections During the Laboratory Studies
    journal, April 2017

    • Beskin, V. S.; Istomin, Ya. N.; Kiselev, A. M.
    • Radiophysics and Quantum Electronics, Vol. 59, Issue 11
    • DOI: 10.1007/s11141-017-9760-8

    Analytic Model for the Time-dependent Electromagnetic Field of an Astrophysical Jet
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