Long-term variation of sunspot penumbra to umbra area ratio
Jha, Bibhuti Kumar, Mandal, Sudip, Banerjee, DipankarVolume:
13
Language:
english
Journal:
Proceedings of the International Astronomical Union
DOI:
10.1017/S1743921318001989
Date:
February, 2018
File:
PDF, 140 KB
english, 2018