Solar cycle changes in sunspot umbral intensity

Astrophysical Journal

Volumn 662, Issue 2 II, 2007, Pages

  Penn, M J ^a   MacDonald, R K D ^b  

^a NATIONAL SOLAR OBSERVATORY   (United States)

^b UNIVERSITY OF WASHINGTON   (United States)

Author keywords

Sun: activity; Sunspots

Indexed keywords

EID: 34547295636     PISSN: 0004637X     EISSN: 15384357     Source Type: Journal    
DOI: 10.1086/519558     Document Type: Article

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