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Investigation of Spatially Unresolved Magnetic Field Outside Sunspots Using Hinode/SOT Observations

Published online by Cambridge University Press:  30 May 2017

Olga Botygina ,
Mykola Gordovskyy  and
Vsevolod Lozitsky
Olga Botygina
Affiliation:
Astronomical Observatory of Taras Shevchenko National University of Kyiv Observatorna str., 3, Kyiv 04053, Ukraine email: olga.botygina@gmail.com
Mykola Gordovskyy
Affiliation:
Jodrell Bank Centre for Astrophysics, University of Manchester, Alan Turing building, Manchester M13 9PL, United Kingdom
Vsevolod Lozitsky
Affiliation:
Astronomical Observatory of Taras Shevchenko National University of Kyiv Observatorna str., 3, Kyiv 04053, Ukraine email: olga.botygina@gmail.com
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Abstract

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The structure of photospheric magnetic fields outside sunspots is investigated in three active regions using Hinode/Solar Optical Telescope(SOT) observations. We analyze Zeeman effect in FeI 6301.5 and FeI 6302.5 lines and determine the observed magnetic field value B eff for each of them. We find that the line ratio B eff(6301)/B eff(6302) is close to 1.3 in the range B eff < 0.2 kG, and close to 1.0 for 0.8 kG < B eff < 1.2 kG. We find that the observed magnetic field is formed by flux tubes with the magnetic field strengths 1.3 − 2.3 kG even in places with weak observed magnetic field fluxes. We also estimate the diameters of smallest magnetic flux tubes to be 15 − 20 km.

Keywords

Sun: magnetic fieldsphotosphere

Information

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S325: Astroinformatics , October 2016 , pp. 59 - 62
Copyright
Copyright © International Astronomical Union 2017 

References

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