REGISTRATION
PERSONAL INFORMATION
| Submission Time: | 2017-07-10 07:02:57 UTC |
| Email: | luizfernando.guedesdossantos@nasa.gov |
| First Name: | Luiz Fernando |
| Middle Name: | |
| Last Name: | Guedes dos Santos |
| Name as it appears on badge : | Luiz F G Santos |
| Affiliation: | NASA - Goddard Space Flight Center |
| Nationality: | Brazil |
| Degree: | Graduate Student |
| Preferred Working Group 1st Choice: | WG 1 (Data) |
| Preferred Working Group 2nd Choice: | WG 4 (Event Campaign) |
PRESENTATION
| Title : | The ‘baby’ steps of CMEs: What can we learn about their future journey to the heliosphere? |
| Abstract | |
| Coronal mass ejections (CMEs) are large-scale explosions of magnetic field and plasma from the Sun\'s corona and the primary drivers of terrestrial space weather. The fastest CMEs can reach Earth in 1-5 days expanding in size as they travel due to their strong entrained magnetic fields. Single viewpoint observations require many assumptions to model the 3D CME dynamic and kinematic evolution. The most common hypotheses are those of radial propagation and self-similar expansion. The use of different viewpoints shows that, at least for some cases, those assumptions are invalid. Using Earth-directed ICME events and different STEREO viewpoints we examine when, how and why some events show over-expansion, significant deflection and/or rotation during their propagation. To that effect, we analyze the intitial stages of CMEs using coronagraphs observations and tracking the changes in the features throughout the heliosphere. Using in situ observations (Wind observations) or modeling, we also estimate the geometrical, kinematic, and dynamical CME parameters. Linking these two reconstructions (remote and in situ) should enable a more complete understanding of the CME evolution. Our ultimate goal is to reconcile the remote and in-situ 3D reconstructions in order to improve the ICME forecast at Earth, one of the key topics of the Space Weather. Here we present an analysis of Earth-directed events from 2008 to 2012 (taken from Wood et al. 2017), where we have both in situ (Wind) and remote sensing (STEREO) observations. Our analysis is based on the methodology proposed by Nieves-Chinchilla et al (2013). | |
LUNCH
Sep. 18, Sep. 19, Sep. 20, Sep. 21, Sep. 22
List
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