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A single open magnetic flux tube spanning the solar photosphere (solar radius R) and the lower corona (R + 10 Mm) is modelled in magnetohydrostatic equilibrium within a realistic stratified atmosphere subject to solar gravity. Such flux…

太阳与恒星天体物理 · 物理学 2014-06-16 Frederick Armstrong Gent , Viktor Fedun , Stuart John Mumford , Robertus Erdelyi

Physical processes in the tail of the solar wind interaction region with the partially ionized local interstellar medium are investigated in a framework of the self-consistent kinetic-gas dynamic model. It is shown that the charge exchange…

天体物理学 · 物理学 2009-11-10 Vladislav V. Izmodenov , Dmitry B. Alexashov

The atmospheres of synchronously rotating exoplanets are intrinsically three-dimensional, and fast vertical and horizontal winds are expected to mix the atmosphere, driving the chemical composition out of equilibrium. Due to the longer…

地球与行星天体物理 · 物理学 2022-08-10 Robin Baeyens , Leen Decin , Ludmila Carone , Olivia Venot , Marcelino Agúndez , Paul Mollière

A Ribbon of enhanced energetic neutral atom (ENA) emissions was discovered by the Interstellar Boundary Explorer (IBEX) in 2009, redefining our understanding of the heliosphere boundaries and the physical processes occurring at the…

太阳与恒星天体物理 · 物理学 2024-11-26 Maher A. Dayeh , Eric J. Zirnstein , Pawel Swaczyna , David J. McComas

Recent advances in Generalized Ensemble simulations and microcanonical analysis allowed the investigation of structural transitions in polymer models over a broad range of local bending and torsion strengths. It is reasonable to argue that…

软凝聚态物质 · 物理学 2022-09-07 B. B. Rodrigues , J. C. S. Rocha , B. V. Costa

Advances in understanding chemical and physical driving forces in self-assembly allow the fabrication of unique nanoarchitectures with subwavelength building blocks as the basis for plasmonic and metamaterial devices. Chemical crosslinking…

Pickup ions are created when interstellar neutral atoms resonantly exchange charge with the solar wind (SW) ions, especially in the supersonic part of the wind, where they carry most of the plasma pressure. Here we present numerical…

太阳与恒星天体物理 · 物理学 2016-12-21 Nikolai V. Pogorelov , Matthew C. Bedford , Igor A. Kryukov , Gary P. Zank

The transport of energetic particles such as Cosmic Rays is governed by the properties of the plasma being traversed. While these properties are rather poorly known for galactic and interstellar plasmas due to the lack of in situ…

太阳与恒星天体物理 · 物理学 2014-06-03 Tobias Wiengarten , Jens Kleimann , Horst Fichtner , Patrick Kühl , Andreas Kopp , Bernd Heber , Ralf Kissmann

We present a new method to extract the three-dimensional electron density profile and density compression ratio of shock fronts associated with Coronal Mass Ejections (CMEs) observed in white light coronagraph images. We demonstrate the…

太阳与恒星天体物理 · 物理学 2018-01-16 Ryun-Young Kwon , Angelos Vourlidas

In a magnetized, collisionless plasma, the magnetic moment of the constituent particles is an adiabatic invariant. An increase in the magnetic-field strength in such a plasma thus leads to an increase in the thermal pressure perpendicular…

高能天体物理现象 · 物理学 2019-02-27 Andrew Alt , Matthew W. Kunz

UV bursts and Ellerman bombs are transient brightenings observed in the low solar atmospheres of emerging flux regions. Observations have discovered the cospatial and cotemporal EBs and UV bursts, and their formation mechanisms are still…

太阳与恒星天体物理 · 物理学 2021-02-17 Lei Ni , Yajie Chen , Hardi Peter , Hui Tian , Jun Lin

Under the low density and high temperature conditions typical of heliospheric plasmas, the macroscopic evolution of the heliosphere is strongly affected by the kinetic plasma physics governing fundamental microphysical mechanisms. Kinetic…

等离子体物理 · 物理学 2017-06-07 Gregory G. Howes

We compute the ground state of a Bose-Einstein condensate confined on a curved surface and unravel the effects of curvatures. Starting with a general formulation for any smooth surface, we apply it to a prolate ellipsoid, which is inspired…

量子气体 · 物理学 2025-11-27 Sheilla M. de Oliveira , Natália Salomé Móller

The misalignment of the solar rotation axis and the magnetic axis of the Sun produces a periodic reversal of the Parker spiral magnetic field and the sectored solar wind. The compression of the sectors is expected to lead to reconnection in…

空间物理 · 物理学 2017-03-22 J. F. Drake , M. Swisdak , M. Opher , J. D. Richardson

In this paper, we study heliospheric Ly-$\alpha$ absorption toward nearby stars in different lines of sight. We use the Baranov-Malama model of the solar wind interaction with a two-component (charged component and H atoms) interstellar…

天体物理学 · 物理学 2015-06-24 V. Izmodenov , B. Wood , R. Lallement

Solar eruptive events such as flares and coronal mass ejection (CME)-driven shocks can release solar energetic particles (SEPs) into the heliosphere. The heliospheric current sheet (HCS) is a large-scale structure that separates regions of…

太阳与恒星天体物理 · 物理学 2026-04-22 C. Han , R. F. Wimmer-Schweingruber , P. Kühl , L. Berger , Z. Ding , A. Kollhoff , Q. Shi , Z. Xu , M. Qin , M. Wang

Magnetic reconnection is a fundamental physical process that can drive rapid conversion of magnetic energy into plasma bulk flows, thermal heating, and particle acceleration in space and astrophysical plasmas. Classical reconnection theory…

In situ measurements of kinetic scale current sheets in the solar wind show that they are often approximately force-free although the plasma beta is of order one. They frequently display systematic asymmetric and anti-correlated spatial…

太阳与恒星天体物理 · 物理学 2025-09-30 Sophie Boswell , Thomas Neukirch , Anton Artemyev , Ivan Vasko , Oliver Allanson

Quantum interference between multiple pathways in molecular photodissociation often results in angular momentum polarization of atomic products and this can give deep insight into fundamental physical processes. For dissociation of diatomic…

化学物理 · 物理学 2022-04-26 Chaya Weeraratna , Arthur G. Suits , Oleg S. Vasyutinskii

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…

太阳与恒星天体物理 · 物理学 2015-06-15 E. Provornikova , M. Opher , V. Izmodenov , G. Toth