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Structure of sunspots observed with Hinode Solar Optical Telescope

Published online by Cambridge University Press:  26 August 2011

Debi Prasad Choudhary ,
Gordon A. MacDonald ,
Na Deng  and
Shimizu Toshifumi
Debi Prasad Choudhary
Affiliation:
Department of Physics and Astronomy, California State University Northridge, 18111 Nordhoff St., Northridge Ca, USA, 91330
Gordon A. MacDonald
Affiliation:
Department of Physics and Astronomy, California State University Northridge, 18111 Nordhoff St., Northridge Ca, USA, 91330
Na Deng
Affiliation:
Department of Physics and Astronomy, California State University Northridge, 18111 Nordhoff St., Northridge Ca, USA, 91330
Shimizu Toshifumi
Affiliation:
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA) 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan
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Abstract

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We studied 16 sunspots with different sizes and shapes using the observations with the Hinode Solar Optical Telescope. The ratio of G-band and CaII H images reveal rich structures both within the umbra and penumbra of most spots. The striking features are the compact blob at the foot point of the umbra side of the penumbral fibrils with disk center-limb side asymmetry. In this paper, we present properties of these features using the spectropolarimetry and images in G-band, CaII and blue filters. We discuss the results using the contemporary models of the sunspots.

Keywords

SunspotsG-bandUmbral dotsbright points
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 478 - 482
Copyright
Copyright © International Astronomical Union 2011

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