THE TEMPERATURE EFFECT IN SECONDARY COSMIC RAYS (MUONS) OBSERVED AT THE GROUND: ANALYSIS OF THE GLOBAL MUON DETECTOR NETWORK DATA

Autor(es):Mostrar menos -

de Mendonca, R. R. S. ; Braga, C. R. ; Echer, E. ; Dal Lago, A. ; Munakata, K. ; Kuwabara, T. ; Kozai, M. ; Kato, C. ; Rockenbach, M. ; Schuch, N. J. ; Al Jassar, H. K. ; Sharma, M. M. ; Tokumaru, M. ; Duldig, M. L. ; Humble, J. E. ; Evenson, P. ; Sabbah, I.

• Tipo de documento: Artigo Científico
• Fonte: ASTROPHYSICAL JOURNAL; v. 830, n. 2 OCT 20 2016.
• Citações Web of Science: 3

Resumo

The analysis of cosmic ray intensity variation seen by muon detectors at Earth's surface can help us to understand astrophysical, solar, interplanetary and geomagnetic phenomena. However, before comparing cosmic ray intensity variations with extraterrestrial phenomena, it is necessary to take into account atmospheric effects such as the temperature effect. In this work, we analyzed this effect on the Global Muon Detector Network (GMDN), which is composed of four ground-based detectors, two in the northern hemisphere and two in the southern hemisphere. In general, we found a higher temperature influence on detectors located in the northern hemisphere. Besides that, we noticed that the seasonal temperature variation observed at the ground and at the altitude of maximum muon production are in antiphase for all GMDN locations (low-latitude regions). In this way, contrary to what is expected in high-latitude regions, the ground muon intensity decrease occurring during summertime would be related to both parts of the temperature effect (the negative and the positive). We analyzed several methods to describe the temperature effect on cosmic ray intensity. We found that the mass weighted method is the one that best reproduces the seasonal cosmic ray variation observed by the GMDN detectors and allows the highest correlation with long-term variation of the cosmic ray intensity seen by neutron monitors. (AU)

• Processo FAPESP: 13/03530-0 - Análise em uma e duas dimensões de precursores de tempestades geomagnéticas através de dados da Rede Global de Detectores de Muons
• Beneficiário: Rafael Rodrigues Souza de Mendonça
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 12/20594-0 - Análise em uma e duas dimensões de precursores de tempestades geomagnéticas através de dados da Rede Gloabl de Detectores de Múons (GMDN)
• Beneficiário: Rafael Rodrigues Souza de Mendonça
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• 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