Coronal mass ejections

Ebook "Physics of the solar corona - An introduction with problems and solutions: Part 2" includes content: Magnetic reconnection; particle acceleration; particle kinematics; hard x rays; gamma rays; radio emission; flare plasma dynamics; coronal mass ejections (CMEs).

499p muasambanhan07 18-02-2024 2 1   Download

We present the ambitions of the SWUSV (Space Weather and Ultraviolet Solar Variability) Microsatellite Mission that encompasses three major scientific objectives: (1) Space Weather including the prediction and detection of major eruptions and coronal mass ejections (LymanAlpha and Herzberg continuum imaging); (2) solar forcing on the climate through radiation and their interactions with the local stratosphere (UV spectral irradiance from 180 to 400 nm by bands of 20 nm, plus Lyman-Alpha and the CN bandhead); (3) simultaneous radiative budget of the Earth, UV to IR, with an accuracy better t...

17p kethamoi1 17-11-2019 11 1   Download

White-light coronagraphic images of Coronal Mass Ejections (CMEs) observed by SOHO/LASCO C2 have been used to estimate the density jump along the whole front of two CME-driven shocks. The two events are different in that the first one was a ‘‘radio-loud’’ fast CME, while the second one was a ‘‘radio quiet’’ slow CME. From the compression ratios inferred along the shock fronts, we estimated the Alfve´n Mach numbers for the general case of an oblique shock.

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The analysis of the spectral properties and dynamic evolution of a CME/shock event observed on November 1st 2003 in white-light by the LASCO coronagraph and in the ultraviolet by the UVCS instrument operating aboard SOHO, has been performed to compute the properties of some important plasma parameters in the middle corona below about 2Rx. Simultaneous observations obtained with the MLSO/Mk4 white-light coronagraph, providing both the early evolution of the CME expansion in the corona and the pre-shock electron density profile along the CME front, were also used to study this event.

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Coronal Mass Ejections are a spectacular an violent phenomenon of the solar atmosphere with repercussions throughout the entire heliosphere. They are a spectacular sight when seen to erupt from the Sun with the aid of a coronagraph such as LASCO on the Solar and Heliospheric Observatory SoHO. They are a violent phenomenon when arriving at Earth, pounding on our magnetosphere, and sometimes disrupting all kinds of achievements of the industrial and information age.

486p tom_123 14-11-2012 63 3   Download