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Related papers: Non-equilibrium Ionization Modeling of Petschek-ty…

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During transient events such as major solar eruptions, the plasma can be far from the equilibrium ionization state because of rapid heating or cooling. Non-equilibrium ionization~(NEI) is important in rapidly evolving systems where the…

Solar and Stellar Astrophysics · Physics 2019-07-17 Jin-Yi Lee , John C. Raymond , Katharine K. Reeves , Chengcai Shen , Yong-Jae Moon , Yeon-Han Kim

We have studied the effect of time-dependent ionization and recombination processes on magnetic reconnection in the solar corona. Petschek-type steady reconnection, in which model the magnetic energy is mainly converted at the slow-mode…

Solar and Stellar Astrophysics · Physics 2015-05-30 S. Imada , I. Murakami , T. Watanabe , H. Hara , T. Shimizu

The thermal structure of the chromosphere is regulated through a complex interaction of various heating processes, radiative cooling, and the ionization degree of the plasma. Here we study the impact on the thermal properties of the…

We investigate the impact of nonequilibrium ionisation (NEI) and the metagalactic radiation-field on the thermal evolution, virial shock stability, and absorption signatures of gas surrounding galaxies. Using 1D, spherically symmetric…

Astrophysics of Galaxies · Physics 2026-05-05 Itai Bromberg , Kartick C. Sarkar , Orly Gnat , Yuval Birnboim

We investigated the detailed plasma condition of the North Polar Spur (NPS)/Loop I using archival $Suzaku$ data. In previous research collisional ionization equilibrium (CIE) have been assumed for X-ray plasma state, but we also assume…

High Energy Astrophysical Phenomena · Physics 2022-03-03 Marino Yamamoto , Jun Kataoka , Yoshiaki Sofue

Partially-ionized plasmas consist of charged and neutral particles whose mutual collisions modify magnetic reconnection compared with the fully-ionized case. The collisions alter the rate and locations of the magnetic dissipation heating…

Solar and Stellar Astrophysics · Physics 2024-05-16 Fulvia Pucci , Alkendra Singh , Uma Gorti , Marco Velli , Neal Turner , Disha Varshney , Maria Elena Innocenti

Non-equilibrium ionization (NEI) is a key process often times neglected when modeling astrophysical plasmas with thermodynamical timescales much shorter than the timescales for ionization and recombination. In this paper, we perform NEI…

Space Physics · Physics 2020-12-24 Marcus DuPont , Chengcai Shen , Nicholas A. Murphy

Starburst-driven galactic outflows in star-forming galaxies have been observed to contain complex thermal structures and emission line features that are difficult to explain by adiabatic fluid models and plasmas in photoionization…

Astrophysics of Galaxies · Physics 2021-11-05 A. Danehkar , M. S. Oey , W. J. Gray

X-ray observations of shock-heated plasmas, such as those found in supernova remnants, often exhibit features of temperature and ionization non-equilibrium. For accurate interpretation of these observations, proper calculations of the…

High Energy Astrophysical Phenomena · Physics 2024-10-02 Yuken Ohshiro , Shunsuke Suzuki , Yoshizumi Okada , Hiromasa Suzuki , Hiroya Yamaguchi

Magnetic reconnection in strongly magnetized regions around the temperature minimum region of the low solar atmosphere is studied by employing MHD-based simulations of a partially ionized plasma within a reactive 2.5D multi-fluid model. It…

Solar and Stellar Astrophysics · Physics 2018-01-15 Lei Ni , Vyacheslav S. Lukin , Nicholas A. Murphy , Jun Lin

Shocks are a universal feature of the lower solar atmosphere which consists of both ionised and neutral species. Including partial ionisation leads to a finite-width existing for shocks, where the ionised and neutral species decouple and…

Solar and Stellar Astrophysics · Physics 2021-01-20 B. Snow , A. Hillier

In this work we combined AWSoM's non-equilibrium ionization [NEI] calculations from (Szente:2022) with the synthetic spectral computations of SPECTRUM (Szente:2019), to predict non-equilibrium line intensities across the entire domain of…

Solar and Stellar Astrophysics · Physics 2023-10-24 Judit Szente , Enrico Landi , Bart van der Holst

Impulsive nanoflares are expected to transiently heat the plasma confined in coronal loops to temperatures of the order of 10 MK. Such hot plasma is hardly detected in quiet and active regions, outside flares. During rapid and short heat…

Astrophysics · Physics 2009-11-13 Fabio Reale , Salvatore Orlando

Magnetic reconnection drives a wide range of astrophysical plasma phenomena, including solar flares, by converting magnetic energy into plasma energy through changes in magnetic field topology. Petschek reconnection is a magnetohydrodynamic…

Solar and Stellar Astrophysics · Physics 2026-04-01 Keita Akutagawa , Shinsuke Imada , Munehito Shoda

Explosive phenomena are known to trigger a wealth of shocks in warm plasma environments, including the solar chromosphere and molecular clouds where the medium consists of both ionised and neutral species. Partial ionisation is critical in…

Solar and Stellar Astrophysics · Physics 2023-08-25 B. Snow , M. Druett , A. Hillier

Observations of some starburst-driven galactic superwinds suggest that strong radiative cooling could play a key role in the nature of feedback and the formation of stars and molecular gas in star-forming galaxies. These catastrophically…

Astrophysics of Galaxies · Physics 2022-09-30 A. Danehkar , M. S. Oey , W. J. Gray

Forward-modeling the emission properties in various passbands is important for confidently identifying magnetohydrodynamic waves in the structured solar corona. We examine how Non-equilibrium Ionization (NEI) affects the Extreme Ultraviolet…

Solar and Stellar Astrophysics · Physics 2019-01-23 Mijie Shi , Bo Li , Tom Van Doorsselaere , Shao-Xia Chen , Zhenghua Huang

We present numerical simulations of the evolution of a supernova (SN) remnant expanding into a uniform background medium with density $n_H = 1.0$ cm$^{-3}$ and temperature of $10^4$ K. We include a dynamically evolving non-equilibrium…

Astrophysics of Galaxies · Physics 2021-03-17 Kartick Chandra Sarkar , Orly Gnat , Amiel Sternberg

Magnetic reconnection plays a crucial role in the energy release process for different kinds of solar eruptions and activities. The rapid solar eruption requires a fast reconnection model. Plasmoid instability in the reconnecting current…

Solar and Stellar Astrophysics · Physics 2024-05-01 Guanchong Cheng , Lei Ni , Zehao Tang , Yajie Chen , Yuhao Chen , Jialiang Hu , Jun Lin

Radiative turbulent mixing layers should be ubiquitous in multi-phase gas with shear flow. They are a potentially attractive explanation for the high ions such as OVI seen in high velocity clouds and the circumgalactic medium (CGM) of…

Astrophysics of Galaxies · Physics 2019-05-17 Suoqing Ji , S. Peng Oh , Phillip Masterson
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