CME dynamics using coronagraph and interplanetary ejecta data

Lago, A. Dal; González, W. D.; Lucas, A. de; Braga, Carlos Roberto; Vieira, Lucas Ramos; Stekel, Tardelli Ronan Coelho; Rockenbach, M.

doi:10.1016/j.asr.2012.11.023

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Combining this large set of in-situ measurements with the remote-sensing techniques described above, OSCAR shall be able to enhance our basic understanding of space weather relevant CME/CIR aspects such as (i) CME propagation out to 1 AU (Dal Lago et al 2013), (ii) CME shock acceleration of energetic electrons (Simnett et al 2002), (iii) interaction of CMEs and CIRs at 1 AU (Gómez-Herrero et al 2011) and (iv) CIR shock acceleration of low energetic ions, which were found to be an additional precursor for geomagnetic storms (although in general the shock structure of CIRs fully develops much beyond 1 AU, it was shown by Smith et al 2004, that some inner CIRs can be fully developed and are at the origin of some large geomagnetic storms).…”

Section: Mission Objectivesmentioning

confidence: 99%

A Space Weather mission concept: Observatories of the Solar Corona and Active Regions (OSCAR)

Strugarek

Janitzek

Lee

et al. 2015

J. Space Weather Space Clim.

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Coronal Mass Ejections (CMEs) and Corotating Interaction Regions (CIRs) are major sources of magnetic storms on Earth and are therefore considered to be the most dangerous space weather events. The Observatories of Solar Corona and Active Regions (OSCAR) mission is designed to identify the 3D structure of coronal loops and to study the trigger mechanisms of CMEs in solar Active Regions (ARs) as well as their evolution and propagation processes in the inner heliosphere. It also aims to provide monitoring and forecasting of geo-effective CMEs and CIRs. OSCAR would contribute to significant advancements in the field of solar physics, improvements of the current CME prediction models, and provide data for reliable space weather forecasting. These objectives are achieved by utilising two spacecraft with identical instrumentation, located at a heliocentric orbital distance of 1 AU from the Sun. The spacecraft will be separated by an angle of 68°to provide optimum stereoscopic view of the solar corona. We study the feasibility of such a mission and propose a preliminary design for OSCAR.

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Section: Mission Objectivesmentioning

confidence: 99%

A Space Weather mission concept: Observatories of the Solar Corona and Active Regions (OSCAR)

Strugarek

Janitzek

Lee

et al. 2015

J. Space Weather Space Clim.

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Pseudo-automatic Determination of Coronal Mass Ejections’ Kinematics in 3D

Braga

Lago

Echer

et al. 2017

ApJ

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Coronal mass ejection (CME) events are among the main drivers of geomagnetic disturbances, and hence play a central role in the Sun–Earth system. Their monitoring and, in particular, the determination of their speed and direction of propagation are key issues for the forecasting of space weather near to Earth. We have implemented a method to track CME events in three dimensions by combining triangulation and tie-pointing analysis with a supervised computer vision algorithm. This novel approach does not rely on any geometric constraint, and eliminates the need for visual identification of the CME boundaries. We applied our method to 17 CME events observed simultaneously by the twin Solar Terrestrial Relations Observatory (STEREO) COR2 coronagraph imagers from 2008 December to 2011 November in order to obtain their 3D kinematical characterization (i.e., the velocity vector) along with their morphological properties. About ten of these events have already been analyzed using other methodologies. In these cases, we carried out a thorough comparison with our results and found that, in spite of the different nature and spatial coverage range of the other methods with respect to CORSET3D, the majority of the results agree. We found, however, that three events exhibited discrepancies in the magnitude of the velocity vector, four in the longitudinal direction of propagation, and in only one case was there a discrepancy in latitude. The discrepancies appeared in those cases where quasi-simultaneous, quasi-co-located events were observed in the coronagraphs’ fields of view.

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CME dynamics using coronagraph and interplanetary ejecta data

Cited by 2 publications

References 18 publications

A Space Weather mission concept: Observatories of the Solar Corona and Active Regions (OSCAR)

A Space Weather mission concept: Observatories of the Solar Corona and Active Regions (OSCAR)

Pseudo-automatic Determination of Coronal Mass Ejections’ Kinematics in 3D

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