Sudden Galactic Cosmic Ray (GCR) intensity decreases are related to the passage of Interplanetary Coronal Mass Ejections (ICMEs). These phenomena are also known as Forbush Decreases (FDs). The deepest FDs are associated with the passage of Magnetic Clouds (MCs). In this preliminary study we select "non-interacting" MCs associated with FDs observed from ground Neutron Monitors in the period 1996-2009, with the aim of reducing the complexity and the number of parameters involved in the GCR-MC interactions. We introduce a method to determine properties of the "ejecta component" of the FD. We analyze properties of the ejecta component in combination with properties of MCs. From the resulting selection of events, we find that those FDs containing ejecta components show stronger correlations with MC parameters than our total sample of events. © 2013 International Astronomical Union.
Documento: | Artículo |
Título: | Galactic cosmic ray decreases associated with non-interacting magnetic clouds in the 23rd solar cycle |
Autor: | Masías-Meza, J.J.; Dasso, S. |
Filiación: | Departamento de Física (FCEN-UBA-IFIBA), BsAs, Argentina Departamento de Física (FCEN-UBA), BsAs, Argentina Instituto de Astronomía y Física Del Espacio (UBA-CONICET), BsAs, Argentina |
Palabras clave: | Cosmic rays; Sun: coronal mass ejections (CMEs); Sun: magnetic fields |
Año: | 2013 |
Volumen: | 8 |
Número: | S300 |
Página de inicio: | 483 |
Página de fin: | 484 |
DOI: | http://dx.doi.org/10.1017/S1743921313011654 |
Título revista: | Proceedings of the International Astronomical Union |
Título revista abreviado: | Proc. Int. Astron. Union |
ISSN: | 17439213 |
PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_17439213_v8_nS300_p483_MasiasMeza.pdf |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v8_nS300_p483_MasiasMeza |