Accession Number : ADA334909

Title :   Fine Structure in Sunspots: Sizes, Lifetimes, Motions and Temporal Variations

Corporate Author : PHILLIPS LAB HANSCOM AFB MA

Personal Author(s) : Sobotka, M. ; Brandt, P. N. ; Simon, G. W.

PDF Url : ADA334909

Report Date : 31 DEC 1997

Pagination or Media Count : 4

Abstract : The analysis of a 4 1/2 hour series of high resolution white light observations of the umbra in a sunspot NOAA 7519 is described. An object-tracking procedure was applied to the destretched movie of 360 frames. In total, 662 umbral dots were tracked and their intensity variations, effective diameters, lifetimes, and proper motions were measured.

Descriptors :   *SUNSPOTS, HIGH RESOLUTION, OPTICAL TRACKING.

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE