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Related papers: A model of the heliosphere with jets

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Opher et al. (2015), Drake et al. (2015) have shown that the heliospheric magnetic field results in formation of two-jet structure of the solar wind flow in the inner heliosheath, i.e. in the subsonic region between the heliospheric…

Solar and Stellar Astrophysics · Physics 2016-10-03 E. A. Golikov , V. V. Izmodenov , D. B. Alexashov , N. A. Belov

The classic accepted view of the heliosphere is a quiescent, comet-like shape aligned in the direction of the Sun's travel through the interstellar medium (ISM) extending for 1000's of AUs (AU: astronomical unit). Here we show, based on…

Solar and Stellar Astrophysics · Physics 2015-06-23 M. Opher , J. F. Drake , B. Zieger , T. I. Gombosi

The picture of the heliopause (HP) -- the boundary between the domains of the sun and the local interstellar medium (LISM) -- as a pristine interface with a large rotation in the magnetic field fails to describe recent Voyager 1 (V1)…

Solar and Stellar Astrophysics · Physics 2015-06-16 M. Swisdak , J. F. Drake , M. Opher

A heliospheric termination shock (HTS) surrounds our solar system at approximately 100 astronomical units from the Sun, where the expanding solar wind (SW) is compressed and heated before encountering the interstellar medium.…

Solar and Stellar Astrophysics · Physics 2025-01-28 E. J. Zirnstein , R. Kumar , B. L. Shrestha , P. Swaczyna , M. A. Dayeh , J. Heerikhuisen , J. R. Szalay

This paper summarizes the results obtained by the team "Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields" supported by the International Space Science Institute in…

The shape of the solar wind bubble within the interstellar medium, the so-called heliosphere, has been explored over six decades. As the Sun moves through the surrounding partially-ionized medium, neutral hydrogen atoms penetrate the…

Space Physics · Physics 2019-02-18 Merav Opher , Abraham Loeb , James Drake , Gabor Toth

Global ideal magnetohydrodynamic models of the heliosphere typically predict a greatly exaggerated magnetic field pile-up in the inner heliosheath (IHS), the region between the termination shock and heliopause. However, Voyager 1 and 2…

Solar and Stellar Astrophysics · Physics 2026-02-16 Sergey D. Korolkov , Igor I. Baliukin , Merav Opher

We present a pioneering model of the interaction between the solar wind and the surrounding interstellar medium that includes the possibility of different pressures in directions parallel and perpendicular to the magnetic field. The outer…

We introduce an updated, time-dependent treatment to the split-tail ("croissant-like") heliosphere model with data-driven solar wind conditions at 1 au, to study the evolution of the heliosphere with solar-cycle variations in plasma speed,…

Solar and Stellar Astrophysics · Physics 2026-03-20 Chika Onubogu , M. Opher , E. Powell , S. Du , J. M. Sokół , J. D. Richardson , B. Van Der Holst

There is currently a controversy as to whether Voyager 1 has already crossed the Termination Shock, the first boundary of the Heliosphere. The region between the Termination Shock and the Heliopause, the Helisheath, is one of the most…

Astrophysics · Physics 2009-11-10 M. Opher , P. C. Liewer , M. Velli , T. I. Gombosi , W. Manchester , D. L. DeZeeuw , G. Toth , I. Sokolov

After the termination shock (TS) crossing, the Voyager 2 spacecraft has been observing strong variations of the magnetic field and solar wind parameters in the heliosheath. Anomalous cosmic rays, electrons, and galactic cosmic rays present…

Solar and Stellar Astrophysics · Physics 2015-06-15 E. Provornikova , M. Opher , V. Izmodenov , G. Toth

The outer heliosphere is a dynamic region shaped largely by the interaction between the solar wind and the interstellar medium. While interplanetary magnetic field and plasma observations by the Voyager spacecraft have significantly…

Space Physics · Physics 2016-12-07 T. K. Kim , N. V. Pogorelov , G. P. Zank , H. A. Elliott , D. J. McComas

We discuss results of magnetohydrodynamical model simulations of plasma dynamics in the proximity of the heliopause (HP). The model is shown to fit details of the magnetic field variations observed by Voyager 1 spacecraft during the…

Solar and Stellar Astrophysics · Physics 2014-01-30 M. Strumik , S. Grzedzielski , A. Czechowski , W. M. Macek , R. Ratkiewicz

Voyager 1 and 2 crossed the heliopause at $\sim$122 AU in 2012 and $\sim$119 AU in 2018, respectively. It was quite a surprise because the thickness of the inner heliosheath obtained by the existing at that time models of the global…

Solar and Stellar Astrophysics · Physics 2023-03-29 V. V. Izmodenov , D. B. Alexashov

The heliosphere is formed due to interaction between the solar wind (SW) and local interstellar medium (LISM). The shape and position of the heliospheric boundary, the heliopause, in space depend on the parameters of interacting plasma…

Solar and Stellar Astrophysics · Physics 2017-08-16 N. V. Pogorelov , J. Heerikhuisen , V. Roytershteyn , L. F. Burlaga , D. A. Gurnett , W. S. Kurth

In this Letter, we provide constraints on the direction and magnitude of the pristine (i.e., unperturbed by the interaction with the Sun) local interstellar magnetic field. The constraints are based on analysis of the interstellar magnetic…

Space Physics · Physics 2020-01-29 Vladislav V. Izmodenov , Dmitry B. Alexashov

In this paper, we present a numerical simulation of an impulsively driven chromospheric jet in the solar atmosphere using the non-ideal magnetohydrodynamic (MHD) equations coupled with frequency- and angle-averaged radiation transport…

Solar and Stellar Astrophysics · Physics 2026-05-26 J. J. González-Avilés

Since its formation 4.6 billion years ago, our solar system has most likely crossed numerous magnetized interstellar clouds and bubbles of different sizes and contents on its path through the Milky Way. Having a reference model for how the…

Solar and Stellar Astrophysics · Physics 2012-10-03 Lotfi Ben-Jaffel , Romana Ratkiewicz

Context. The heliosphere is formed by the interaction between the solar wind (SW) plasma emanating from the Sun and a magnetised component of local interstellar medium (LISM) inflowing on the Sun. A separation surface called the heliopause…

Solar and Stellar Astrophysics · Physics 2023-10-11 P. Bladek , R. Ratkiewicz

Based on the difference between the orientation of the interstellar $B_{ISM}$ and the solar magnetic fields, there was an expectation that the magnetic field direction would rotate dramatically across the heliopause (HP). However, the…

Space Physics · Physics 2017-04-19 M. Opher , J. F. Drake , M. Swisdak , B. Zieger , G. Toth
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