Solar Type II Radio Bursts Recorded by the Compound Astronomical Low-Frequency Low-Cost Instrument for Spectroscopy in Transportable Observatories in Brazil

Autor(es)

Cunha-Silva, R. D. ^[1] ; Fernandes, F. C. R. ^[1] ; Selhorst, C. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Vale Paraiba UNIVAP, IP&D, BR-12244000 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SOLAR PHYSICS; v. 289, n. 12, p. 4607-4620, DEC 2014.
• Citações Web of Science: 3

Resumo

It is well established that solar Type-II radio bursts are signatures of magnetohydrodynamical (MHD) shock waves propagating outward through the solar corona. Nevertheless, there are long-standing controversies about how these shocks are formed; solar flares and the coronal mass ejections (CMEs) are considered to be the most likely drivers. We present the results of the analysis of four solar Type-II bursts recorded between 20 January 2010 and 17 November 2011 by the Compound Astronomical Low-frequency Low-cost Instrument for Spectroscopy in Transportable Observatories (CALLISTO-BR) (in Brazil), which operates in the frequency range of 45 -aEuro parts per thousand 870 MHz. For all four solar Type-II radio bursts, which consisted of one event without band splitting and three split-band variants, the outcomes are consistent with those reported in the literature. All four Type-II radio bursts were accompanied by both solar flares and CMEs, which are associated with the impulsive phase of the flares and, very likely, with the acceleration phase of the CMEs. (AU)

• Processo FAPESP: 12/08445-9 - Estudo da variabilidade dia-a-dia da mesosfera, termosfera e ionosfera em baixas latitudes e região equatorial, durante o ciclo solar 24
• Beneficiário: Paulo Roberto Fagundes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/00009-5 - Diagnóstico de emissões solares em ondas métricas e decimétricas associadas à ocorrência de ejeções de massa coronal (CME) e flares solares
• Beneficiário: Rafael Douglas Cunha da Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado