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pro vyhledávání: '"Bradshaw S"'
We present observations of wave steepening and signatures of shock formation during expansion of ultracold neutral plasmas formed with an initial density distribution that is centrally peaked and decays exponentially with distance. The plasma acceler
Externí odkaz:
http://arxiv.org/abs/2409.11319
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2021;, stab3163
The Enthalpy Based Thermal Evolution of Loops (EBTEL) approximate model for static and dynamic coronal loops is developed to include the effect of a loop cross-sectional area which increases from the base of the transition region (TR) to the corona.
Externí odkaz:
http://arxiv.org/abs/2111.09339
Constraining the frequency of energy deposition in magnetically-closed active region cores requires sophisticated hydrodynamic simulations of the coronal plasma and detailed forward modeling of the optically-thin line-of-sight integrated emission. Ho
Externí odkaz:
http://arxiv.org/abs/2107.07612
Publikováno v:
Phys. Rev. Lett. 126, 085002 (2021)
We demonstrate magnetic confinement of an ultracold neutral plasma (UCNP) created at the null of a biconic cusp, or quadrupole magnetic field. Initially, the UCNP expands due to electron thermal pressure. As the plasma encounters stronger fields, exp
Externí odkaz:
http://arxiv.org/abs/2010.16355
Autor:
Johnston, C. D., Cargill, P. J., Hood, A. W., De Moortel, I., Bradshaw, S. J., Vaseekar, A. C.
Publikováno v:
A&A 635, A168 (2020)
Modelling the solar Transition Region with the use of an Adaptive Conduction (TRAC) method permits fast and accurate numerical solutions of the field-aligned hydrodynamic equations, capturing the enthalpy exchange between the corona and transition re
Externí odkaz:
http://arxiv.org/abs/2002.01887
To adequately constrain the frequency of energy deposition in active region cores in the solar corona, systematic comparisons between detailed models and observational data are needed. In this paper, we describe a pipeline for forward modeling active
Externí odkaz:
http://arxiv.org/abs/1906.03350
Publikováno v:
A&A 625, A149 (2019)
Thermal non-equilibrium (TNE) is believed to be a potentially important process in understanding some properties of the magnetically closed solar corona. Through one-dimensional hydrodynamic models, this paper addresses the importance of the numerica
Externí odkaz:
http://arxiv.org/abs/1904.07287
Autor:
Johnston, C. D., Bradshaw, S. J.
The brightness of the emission from coronal loops in the solar atmosphere is strongly dependent on the temperature and density of the confined plasma. After a release of energy, these loops undergo a heating and upflow phase, followed by a cooling an
Externí odkaz:
http://arxiv.org/abs/1903.01132