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We present a new method to identify large scale filaments and apply it to a cosmological simulation. Using positions of haloes above a given mass as node tracers, we look for filaments between them using the positions and masses of all the…

宇宙学与河外天体物理 · 物理学 2011-02-22 Roberto E. Gonzalez , Nelson E. Padilla

Context. Fine-scale structures of the solar chromosphere, particularly fibrils, are known to host various types of magnetohydrodynamic (MHD) waves that can transport energy to the corona. In particular, absorption features observed in the…

太阳与恒星天体物理 · 物理学 2025-05-01 E. Petrova , T. Van Doorsselaere , M. van Noort , D. Berghmans , J. S. Castellanos Durán

In this study we present a statistical analysis of 53 fast Earth-directed halo CMEs observed by the SOHO/LASCO instrument during the period Jan. 2009-Sep. 2015, and we use this CME sample to test the capabilities of a Sun-to-Earth…

太阳与恒星天体物理 · 物理学 2017-12-19 Camilla Scolini , Mauro Messerotti , Stefaan Poedts , Luciano Rodriguez

Coronal mass ejections (CMEs) can create significant disruption to human activities and systems on Earth, much of which can be mitigated with prior warning of the upstream solar wind conditions. However, it is currently extremely…

The heliosphere represents a uniquely accessible domain of space, where fundamental physical processes common to solar, astrophysical and laboratory plasmas can be studied under conditions impossible to reproduce on Earth and unfeasible to…

太阳与恒星天体物理 · 物理学 2019-08-14 D. Mueller , R. G. Marsden , O. C. StCyr , H. R. Gilbert

In this draft photometry and astrometry is presented from the Herschel Space Observatory (HSO). This spacecraft orbits the second Lagrangian point (L2) of the Sun -- Earth system, yielding a mean distance of a million miles (~ 1.5 million…

天体物理仪器与方法 · 物理学 2011-04-04 András Pál

The Solar TErrestrial RElations Observatory (STEREO) mission has laid a foundation for advancing real-time space weather forecasting by enabling the evaluation of heliospheric imager (HI) data for predicting coronal mass ejection (CME)…

Filaments are omnipresent features in the solar atmosphere. Their location, properties and time evolution can provide information about changes in solar activity and assist the operational space weather forecast. Therefore, filaments have…

The Sun is the only star where the superficial turbulent convection can be observed at very high spatial resolution. The Solar Dynamics Observatory (SDO) has continuously observed the full Sun from space with multi-wavelength filters since…

太阳与恒星天体物理 · 物理学 2021-08-18 J. Ballot , T. Roudier , J. M. Malherbe , Z. Frank

We report an unusual set of observations of waves in a large prominence pillar which consist of pulses propagating perpendicular to the prominence magnetic field. We observe a huge quiescent prominence with the Solar Dynamics Observatory…

太阳与恒星天体物理 · 物理学 2015-06-17 B. Schmieder , T. A. Kucera , K. Knizhnik , M. Luna , A. Lopez-Ariste , D. Toot

Understanding and predicting the structure and evolution of coronal mass ejections (CMEs) in the heliosphere remains one of the most sought-after goals in heliophysics and space weather research. A powerful tool for improving current…

Complex CME/ICME structures in the solar wind often arising in the heliosphere as a result of interaction between two or more CMEs are very important due to their enhanced geoefficiency, but their modeling is difficult due to lack of…

太阳与恒星天体物理 · 物理学 2025-01-14 Denis Rodkin , Vladislav Lukmanov , Vladimir Slemzin , Igor Chashei

The Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO) is designed to study oscillations and the mag- netic field in the solar photosphere. It observes the full solar disk in the Fe I absorption line at…

太阳与恒星天体物理 · 物理学 2015-05-28 Bernhard Fleck , Sebastien Couvidat , Thomas Straus

Coronal mass ejections (CMEs), as a large-scale eruptive phenomenon, often reveal some precursors in the initiation phase, e.g., X-ray brightening, filament darkening, etc, which are useful for CME modeling and space weather forecast. With…

天体物理学 · 物理学 2009-11-13 P. F. Chen , D. E. Innes , S. K. Solanki

The Solar TErrestrial RElations Observatory - \emph{STEREO}, is a system of two identical spacecraft in Heliocentric Earth orbit. We use the two Heliospheric Imagers (HI), which are wide angle imagers with multi-baffle systems to do high…

太阳与恒星天体物理 · 物理学 2011-08-11 Vinothini Sangaralingam , Ian R Stevens

We discuss features of coronal mass ejections (CMEs) that are specific to heliospheric observations at large elongation angles. Our analysis is focused on a series of two eruptions that occurred on 2007 January 24-25, which were tracked by…

空间物理 · 物理学 2009-05-18 N. Lugaz , A. Vourlidas , I. I. Roussev , C. Jacobs , W. B. Manchester , O. Cohen

The fine structures of the solar chromosphere, driven by photospheric motions, play a crucial role in the dynamics of solar magnetic fields. Many have been already identified such as fibrils, filament feet, and arch filament systems. Still,…

An established technique for the measurement of ultra-high-energy-cosmic-rays is the detection of the fluorescence light induced in the atmosphere of the Earth, by means of telescopes equipped with photomultiplier tubes. Silicon…

The formation and evolution process and magnetic configuration of solar prominences remain unclear. In order to study the formation process of prominences, we examine continuous observations of a prominence in NOAA AR 10953 with the Solar…