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Magnetic fields emerging from the Sun's interior carry information about physical processes of magnetic field generation and transport in the convection zone. Soon after appearance on the solar surface the magnetic flux gets concentrated in…

太阳与恒星天体物理 · 物理学 2009-11-13 A. G. Kosovichev

We explore the cause of the solar cycle variabilities using a novel 3D Babcock--Leighton dynamo model. In this model, based on the toroidal flux at the base of the convection zone, bipolar magnetic regions (BMRs) are produced with…

太阳与恒星天体物理 · 物理学 2019-01-30 Bidya Binay Karak , Mark Miesch

With multiple vantage points around the Sun, STEREO and SDO imaging observations provide a unique opportunity to view the solar surface continuously. We use He II 304 A data from these observatories to isolate and track ten active regions…

太阳与恒星天体物理 · 物理学 2015-12-16 Ignacio Ugarte-Urra , Lisa Upton , Harry P. Warren , David H. Hathaway

Small bipolar magnetic features are observed to appear in the interior of individual granules in the quiet Sun, signaling the emergence of tiny magnetic loops from the solar interior. We study the origin of those features as part of the…

太阳与恒星天体物理 · 物理学 2018-06-05 F. Moreno-Insertis , J. Martinez-Sykora , V. H. Hansteen , D. Muñoz

We propose that grand minima in solar activity are caused by simultaneous fluctuations in the meridional circulation and the Babcock-Leighton mechanism for the poloidal field generation in the flux transport dynamo model. We present the…

太阳与恒星天体物理 · 物理学 2015-06-16 Bidya Binay Karak , Arnab Rai Choudhuri

The axisymmetric component of the large-scale solar magnetic fields has a pronounced poleward branch at higher latitudes. In order to clarify the origin of this branch we construct an axisymmetric model of the passive transport of the mean…

天体物理学 · 物理学 2015-06-24 K. Petrovay , G. Szakaly

G-band bright points (GBPs) are thought to be the foot-points of magnetic flux tubes. The aim of this paper is to investigate the relation between the diffusion regimes of GBPs and the associated longitudinal magnetic field strengths. Two…

太阳与恒星天体物理 · 物理学 2017-03-15 Yang Yunfei , Ji Kaifai , Feng Song , Deng Hui , Wang Feng , Lin Jiaben

We study intermittency as a departure from self-similarity of the solar wind magnetic turbulence and investigate the evolution with the heliocentric distance and latitude. We use data from the Ulysses spacecraft measured during two solar…

空间物理 · 物理学 2016-08-24 Anna Wawrzaszek , Marius Echim , Wiesław M. Macek , Roberto Bruno

The observed convective flows on the photosphere (e.g., supergranulation, granulation) play a key role in the Babcock-Leighton (BL) process to generate large-scale polar fields from sunspots fields. In most surface flux transport (SFT) and…

太阳与恒星天体物理 · 物理学 2018-09-17 Gopal Hazra , Mark Miesch

We study the motions of G band bright points (GBPs) in the quiet Sun to obtain the characteristics of different motion types. A high resolution image sequence taken with the Hinode/Solar Optical Telescope (SOT) is used, and GBPs are…

太阳与恒星天体物理 · 物理学 2015-06-22 Yun-Fei Yang , Hui-Xue Qu , Kai-Fan Ji , Song Feng , Hui Deng , Jia-Ben Lin , Feng Wang

Observations of magnetic helicity transportation through the solar photosphere reflect the interaction of turbulent plasma movements and magnetic fields in the solar dynamo process. In this chapter, we have reviewed the research process of…

太阳与恒星天体物理 · 物理学 2023-11-14 Hongqi Zhang , Shangbin Yang , Haiqing Xu , Xiao Yang , Jie Chen , Jihong Liu

We investigate the combined effect of solar wind, Poynting-Robertson drag, and the frozen-in interplanetary magnetic field on the motion of charged dust grains in our solar system. For this reason we derive a secular theory of motion by the…

地球与行星天体物理 · 物理学 2016-08-26 Christoph Lhotka , Philippe Bourdin , Yasuhito Narita

Using time-distance helioseismology applied to 14-years of SDO/HMI observations spanning solar cycle 24 and rising phase of cycle 25, we present evidence that meridional flows in the lower half of the near-surface shear layer (NSSL),…

太阳与恒星天体物理 · 物理学 2026-04-21 Anisha Sen , S. P. Rajaguru , Ruizhu Chen , Junwei Zhao , Shukur Kholikov

The butterfly diagram of the solar cycle exhibits a poleward migration of the diffuse magnetic field resulting from the decay of trailing sunspots. It is one component of what is sometimes referred to as the "rush to the poles". We…

太阳与恒星天体物理 · 物理学 2024-12-25 Simon Cloutier , Robert H. Cameron , Laurent Gizon

The intermittency of density fluctuations in the solar wind at kinetic scales has been examined using high time resolution Faraday cup measurements from the Spektr-R spacecraft. It was found that the probability density functions (PDFs) of…

空间物理 · 物理学 2014-06-23 C. H. K. Chen , L. Sorriso-Valvo , J. Šafránková , Z. Němeček

We consider the effect of a magnetic field $B$ on the transport of neutral composite particles, excitons, in weakly disordered 2D systems. In the case of classical transport, when the interference of different paths is neglected, the…

介观与纳米尺度物理 · 物理学 2007-05-23 P. I. Arseev , A. B. Dzyubenko

We present a microscopic theory for multiple light scattering occurring in inhomogeneous 3D media subject to an external magnetic field. Magneto-optical effects (the Faraday effect and the Cotton-Mouton effect) occur inside the small…

凝聚态物理 · 物理学 2007-05-23 Bart A. van Tiggelen , Roger Maynard , Theo M. Nieuwenhuizen

In this contribution we describe some recent observations of high-speed magnetized flows in the quiet Sun granulation. These observations were carried out with the Imaging Magnetograph eXperiment (IMaX) onboard the stratospheric balloon…

Magnetic element tracking is often used to study the transport and diffusion of the magnetic field on the solar photosphere. From the analysis of the displacement spectrum of these tracers, it has been recently agreed that a regime of…

太阳与恒星天体物理 · 物理学 2015-04-01 D. Del Moro , F. Giannattasio , F. Berrilli , G. Consolini , F. Lepreti , M. Gosic

Regions of quiet Sun generally exhibit a complex distribution of small-scale magnetic field structures, which interact with the near-surface turbulent convective motions. Furthermore, it is probable that some of these magnetic fields are…

太阳与恒星天体物理 · 物理学 2015-06-18 Paul J. Bushby , Benjamin Favier