Study of the changes in the solar magnetic field based on radio observations

• Grant number: 14/10489-0
• Support Opportunities: Regular Research Grants
• Duration: October 01, 2014 - March 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Solar System Astronomy
• Principal Investigator: Caius Lucius Selhorst
• Grantee: Caius Lucius Selhorst
• Host Institution: Centro de Ciências Exatas e Tecnológicas. Universidade Cruzeiro do Sul (UNICSUL). São Paulo , SP, Brazil
• Associated researchers: Carlos Guillermo Giménez de Castro ; Joaquim Eduardo Rezende Costa ; Paulo José de Aguiar Simões

Abstract

The project aims to study of magnetized features in the solar atmosphere. We can separate this regions in: a) the equatorial features which characterize the solar cycle (sunspots, active regions, plages, etc); b) the polar features that are correlated with the changes in the solar large scale magnetic fields (coronal holes, faculae, bright patches, etc). The study of these regions will be made by observational data analysis (optical wavelengths, radio, EUV and X-rays) with the objective of characterize the features emission at distinct layers of the solar atmosphere. Based on the observational results the active regions will be modeled using magnetic field extrapolations. The model aims to estimate the brightness temperatures values at radio frequencies and the emission processes present. Moreover, the changes in the particles temperature and density distributions at the active regions will be estimated. The numerical simulations results will be compared with the observations at radio frequencies. (AU)

Scientific publications

(13)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CUNHA-SILVA, R. D.; FERNANDES, F. C. R.; SELHORST, C. L.. Shock wave driven by CME evidenced by metric type II burst and EUV wave. Advances in Space Research, v. 56, n. 12, p. 2804-2810, DEC 15 2015. (12/08445-9, 14/10489-0, 12/00009-5)

SELHORST, CAIUS LUCIUS; VALIO, ADRIANA; NANDY, D; VALIO, A; PETIT, P. The influence of eclipses in the stellar radio emission. LIVING AROUND ACTIVE STARS, v. 12, n. S328, p. 3-pg., 2017-01-01. (14/10489-0)

CUNHA-SILVA, R. D.; SELHORST, C. L.; FERNANDES, F. C. R.; OLIVEIRA E SILVA, A. J.. Well-defined EUV wave associated with a CME-driven shock. ASTRONOMY & ASTROPHYSICS, v. 612, p. 6-pg., 2018-05-04. (14/10489-0)

OLIVEIRA E SILVA, A. J.; SELHORST, C. L.; SIMOES, P. J. A.; GIMENEZ DE CASTRO, C. G.. Comparison of solar radio and extreme ultraviolet synoptic limb charts during the present solar maximum. Astronomy & Astrophysics, v. 592, AUG 2016. (14/10489-0)

CUNHA-SILVA, R. D.; SELHORST, C. L.; FERNANDES, F. C. R.; OLIVEIRA E SILVA, A. J.. Well-defined EUV wave associated with a CME-driven shock. Astronomy & Astrophysics, v. 612, MAY 4 2018. (14/10489-0)

CUNHA-SILVA, R. D.; FERNANDES, F. C. R.; SELHORST, C. L.. Solar type II radio bursts associated with CME expansions as shown by EUV waves. Astronomy & Astrophysics, v. 578, JUN 2015. (12/08445-9, 14/10489-0, 12/00009-5)

SELHORST, CAIUS L.; SIMOES, PAULO J. A.; OLIVEIRA E SILVA, ALEXANDRE J.; GIMENEZ DE CASTRO, C. G.; COSTA, JOAQUIM E. R.; VALIO, ADRIANA. Association of Radio Polar Cap Brightening with Bright Patches and Coronal Holes. ASTROPHYSICAL JOURNAL, v. 851, n. 2, DEC 20 2017. (14/10489-0)

ROSA, D. A.; RODRIGUES, I; KRABBE, A. C.; MILONE, A. C.; CARVALHO, S.. The physical properties and evolution of the interacting system AM1204-292. Monthly Notices of the Royal Astronomical Society, v. 501, n. 3, p. 3750-3766, MAR 2021. (13/17247-9, 14/10489-0, 16/21532-9, 11/13250-0)

WEDEMEYER, S.; BASTIAN, T.; BRAJSA, R.; HUDSON, H.; FLEISHMAN, G.; LOUKITCHEVA, M.; FLECK, B.; KONTAR, E. P.; DE PONTIEU, B.; YAGOUBOV, P.; et al. Solar Science with the Atacama Large Millimeter/Submillimeter Array-A New View of Our Sun. SPACE SCIENCE REVIEWS, v. 200, n. 1-4, p. 1-73, APR 2016. (14/10489-0)

SELHORST, CAIUS L.; SIMOES, PAULO J. A.; BRAJSA, ROMAN; VALIO, ADRIANA; GIMENEZ DE CASTRO, C. G.; COSTA, JOAQUIM E. R.; MENEZES, FABIAN; PIERRE ROZELOT, JEAN; HALES, ANTONIO S.; IWAI, KAZUMASA; et al. Solar Polar Brightening and Radius at 100 and 230GHz Observed by ALMA. ASTROPHYSICAL JOURNAL, v. 871, n. 1, JAN 20 2019. (14/10489-0)

OLIVEIRA E SILVA, A. J.; SELHORST, C. L.; SIMOES, P. J. A.; GIMENEZ DE CASTRO, C. G.. Comparison of solar radio and extreme ultraviolet synoptic limb charts during the present solar maximum. ASTRONOMY & ASTROPHYSICS, v. 592, p. 6-pg., 2016-08-01. (14/10489-0)

DE OLIVEIRA E SILVA, ALEXANDRE JOSE; SELHORST, CAIUS LUCIUS; NANDY, D; VALIO, A; PETIT, P. The behavior of the spotless active regions during the solar minimum 23-24. LIVING AROUND ACTIVE STARS, v. 12, n. S328, p. 3-pg., 2017-01-01. (14/10489-0)

GUSMAO, EBER A.; SELHORST, CAIUS L.; OLIVEIRA, ALEXANDRE S.; NANDY, D; VALIO, A; PETIT, P. Analysis Of Kepler-71 Activity Through Planetary Transit. LIVING AROUND ACTIVE STARS, v. 12, n. S328, p. 3-pg., 2017-01-01. (14/10489-0)