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Properties of Coronal Holes in Solar Cycle 21-23 using McIntosh archive

Published online by Cambridge University Press:  27 November 2018

Rakesh Mazumder Open the ORCID record for Rakesh Mazumder [Opens in a new window] ,
Prantika Bhowmik  and
Dibyendu Nandy
Rakesh Mazumder
Affiliation:
Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
Prantika Bhowmik
Affiliation:
Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
Dibyendu Nandy
Affiliation:
Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
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Abstract

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We study the properties of coronal holes during solar cycle 21-23 from the McIntosh archive. In the spatial distribution of coronal hole area we find that there is a sharp increase in coronal hole area at high latitude in agreement with expected open flux configuration there. In overall spatiotemporal distribution of coronal hole centroids, we find the dominance of high latitude coronal holes except for the maximum of the solar cycle, when coronal holes mostly appear in low latitudes. This is in agreement with the expected solar cycle evolution of surface magnetic flux.

Keywords

Sun: coronal holeSun: Carrington map
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 187 - 188
Copyright
Copyright © International Astronomical Union 2018 

References

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