Are polar faculae generated by a local dynamo?

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/5185

Title:	Are polar faculae generated by a local dynamo?
Authors:	Sivaraman, K. R Antia, H. M Chitre, S. M
Issue Date:	2010
Publisher:	Springer
Citation:	Hasan, S. S and Rutten, R. T., eds., Magnetic coupling between the interior and atmosphere of the Sun, Proceedings of the conference "Centenary commemoration of the discovery of the Evershed effect" Dec, 2 - 5, 2008, Indian Institute of Astrophysics, Bangalore, India, pp. 386 – 389
Series/Report no.:	Astrophysics and Space Science Proceedings;
Abstract:	Polar faculae (PF) are bright, small-scale structures measuring a few seconds of arc, populating the polar zones at latitudes >50°. They possess magnetic fields ranging from 150 to 1,700 Gauss and largely constitute the polar magnetic fields. Where and how their fields are generated in the solar interior remain open questions. Using measurements of PF rotation rates, we show that their anchor depths probably lie in subsurface layers at radius r/R ȯ = 0:94-1.00. If so, the PF fields are possibly generated by a local dynamo in a subsurface shear layer extending to r/R ȯ > 0:94.
Description:	Restricted Access The original publication is available at springerlink.com
URI:	http://hdl.handle.net/2248/5185
ISBN:	978-3-642-02858-8
Appears in Collections:	IIAP Publications

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