Deriving the solar activity cycle modulation on cosmic ray intensity observed by Nagoya muon detector from October 1970 until December 2012

Autor(es)

de Mendonca, Rafael R. S. ; Braga, Carlos. R. ; Echer, Ezequiel ; Dal Lago, Alisson ; Rockenbach, Marlos ; Schuch, Nelson J. ; Munakata, Kazuoki ; Nandy, D ; Valio, A ; Petit, P

• Tipo de documento: Artigo Científico
• Fonte: LIVING AROUND ACTIVE STARS; v. 12, n. S328, p. 4-pg., 2017-01-01.

Resumo

It is well known that the cosmic ray intensity observed at the Earth's surface presents an 11 and 22-yr variations associated with the solar activity cycle. However, the observation and analysis of this modulation through ground muon detectors data have been difficult due to the temperature effect. Furthermore, instrumental changes or temporary problems may difficult the analysis of these variations. In this work, we analyze the cosmic ray intensity observed since October 1970 until December 2012 by the Nagoya muon detector. We show the results obtained after analyzing all discontinuities and gaps present in this data and removing changes not related to natural phenomena. We also show the results found using the mass weighted method for eliminate the influence of atmospheric temperature changes on muon intensity observed at ground. As a preliminary result of our analyses, we show the solar cycle modulation in the muon intensity observed for more than 40 years. (AU)

• Processo FAPESP: 14/24711-6 - Estudo conjunto de ejeções coronais de massa e suas estruturas correspondentes nas vizinhanças da Terra
• Beneficiário: Carlos Roberto Braga
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado