Sunspot group tilt angles from drawings for cycles 19-24

27 Apr 2018 Isik Emre Isik Seda Kabasakal Bahar B.

The tilt angle of a sunspot group is a critical quantity in the surface transport of magnetic flux and the solar dynamo. To contribute long-term databases of the tilt angle, we developed an IDL routine, which allows the user to interactively select and measure sunspot positions and areas on the solar disc... (read more)

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  • SOLAR AND STELLAR ASTROPHYSICS