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The behavior of the spotless active regions during the solar minimum 23-24

Published online by Cambridge University Press:  12 September 2017

Alexandre José de Oliveira e Silva  and
Caius Lucius Selhorst
Alexandre José de Oliveira e Silva
Affiliation:
IP&D - Universidade do Vale do Paraíba (UNIVAP) - São José dos Campos, SP, Brazil email: [email protected]
Caius Lucius Selhorst
Affiliation:
IP&D - Universidade do Vale do Paraíba (UNIVAP) - São José dos Campos, SP, Brazil email: [email protected] NAT - Universidade Cruzeiro do Sul - São Paulo, SP, Brazil email: [email protected]
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Abstract

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In this work, we analysed the physical parameters of the spotless actives regions observed during solar minimum 23 – 24 (2007 – 2010). The study was based on radio maps at 17 GHz obtained by the Nobeyama Radioheliograph (NoRH) and magnetograms provided by the Michelson Doppler Imager (MDI) on board the Solar and Heliospheric Observatory (SOHO). The results shows that the spotless active regions presents the same radio characteristics of a ordinary one, they can live in the solar surface for long periods (>10 days), and also can present small flares.

Keywords

Sun: sunspotsactives regions - Sun: radio radiation - Sun: magnetograms
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S328: Living Around Active Stars , October 2016 , pp. 137 - 139
Copyright
Copyright © International Astronomical Union 2017 

References

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