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Laser experiment for the study of accretion dynamics of Young Stellar Objects: design and scaling
- Source :
- High Energy Density Physics, High Energy Density Physics, Elsevier, 2019, 33, pp.100711. ⟨10.1016/j.hedp.2019.100711⟩, High Energy Density Physics, 2019, 33, pp.100711. ⟨10.1016/j.hedp.2019.100711⟩
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- A new experimental set-up designed to investigate the accretion dynamics in newly born stars is presented. It takes advantage of a magnetically collimated stream produced by coupling a laser-generated expanding plasma to a $2\times 10^{5}~{G}\ (20~{T})$ externally applied magnetic field. The stream is used as the accretion column and is launched onto an obstacle target that mimics the stellar surface. This setup has been used to investigate in details the accretion dynamics, as reported in [G. Revet et al., Science Advances 3, e1700982 (2017), arXiv:1708.02528}. Here, the characteristics of the stream are detailed and a link between the experimental plasma expansion and a 1D adiabatic expansion model is presented. Dimensionless numbers are also calculated in order to characterize the experimental flow and its closeness to the ideal MHD regime. We build a bridge between our experimental plasma dynamics and the one taking place in the Classical T Tauri Stars (CTTSs), and we find that our set-up is representative of a high plasma $\beta$ CTTS accretion case.
- Subjects :
- Nuclear and High Energy Physics
Young stellar object
FOS: Physical sciences
01 natural sciences
010305 fluids & plasmas
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
010306 general physics
Adiabatic process
ComputingMilieux_MISCELLANEOUS
Astrophysics::Galaxy Astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
Radiation
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
Plasma
Accretion (astrophysics)
Physics - Plasma Physics
[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
Magnetic field
Computational physics
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Plasma Physics (physics.plasm-ph)
Stars
T Tauri star
Astrophysics - Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Magnetohydrodynamics
Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- ISSN :
- 15741818
- Database :
- OpenAIRE
- Journal :
- High Energy Density Physics, High Energy Density Physics, Elsevier, 2019, 33, pp.100711. ⟨10.1016/j.hedp.2019.100711⟩, High Energy Density Physics, 2019, 33, pp.100711. ⟨10.1016/j.hedp.2019.100711⟩
- Accession number :
- edsair.doi.dedup.....67e554b9b5548056917c27508fe9c196
- Full Text :
- https://doi.org/10.48550/arxiv.1909.00730