Sun-as-a-star spectrum variabilityThe sun is observed as a start in order to determine luminosity change, detect minute variability in average granulation and focular signals, and to use as a standard against which other stars might be compared. In this regard, topics discussed include: total irradiance variability as measured from space by the Activity Cavity Radiometer Irradiance Monitor and Earth Radiation Budget radiometers; Fraunhofer line heights of formation and examples of their variability in visible wavelenghts; ultraviolet and extreme ultraviolet irradiance variability as observed from space; the magnetic origin of irradiance change; and the observed mean magnetic field of the sun.
Document ID
19920053611
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Livingston, William (National Solar Observatory Tucson, AZ, United States)
Donnelly, Richard F. (NOAA Boulder, CO, United States)
Grigor'ev, Viktor (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Demidov, M. L. (Sibirskii IZMIRAN Irkutsk, Russia)
Lean, Judith (U.S Navy, Naval Research Laboratory, Washington DC, United States)
Steffen, Matthias (Kiel, Universitaet Federal Republic of Germany, United States)
White, Oran R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Willson, Richard L. (JPL Pasadena, CA, United States)