Analysis of Chains of Metric Solar Type I Bursts

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: SOLAR PHYSICS; v. 290, n. 1, p. 159-168, JAN 2015.
• Citações Web of Science: 5

Resumo

Type I radio noise storms are believed to provide a diagnostic of electron acceleration in the corona. Most type I bursts appear in chains of five or more individual bursts. An analysis of the chain properties may indicate electron density, height of emission source, and magnetic-field intensity. We studied 255 chains of solar type I solar bursts recorded by the Compact Astronomical Low-cost Low-frequency Instrument for Spectroscopy and Transportable Observatory (CALLISTO-BLEN) spectrograph from 30 July to 9 August 2011 in the frequency range 170 -aEuro parts per thousand 870 MHz. Based on the morphological characteristics identified in the dynamic spectra, we determined the physical parameters for the events. The source electron density was found to be in the range 0.5 -aEuro parts per thousand 1.6x10(9) cm(-3), the radial velocity of the emitting plasma varied from -1600 -aEuro parts per thousand 1500 km s(-1), the magnetic-field strength was in the range 2.2 -aEuro parts per thousand 3.3 G, and the height of the source ranged from 0.95 to 1.15 solar radii. The results are consistent with previously reported values. (AU)

• 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