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Barbara Bell

Harvard University

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Smithsonian Contributions to Astrophysics | 1957

Geomagnetism and the emission-line corona, 1950-1953

Barbara Bell; Harold Glazer

107

Icarus | 1965

Lunar eclipses and the forecasting of solar minima

Barbara Bell; John G. Wolbach

Abstract It is shown that an equation, derived by Danjon from a study of the variation in brightness of the eclipsed Moon with phase of the sunspot cycle, predicts dates in good agreement with observed sunspot minima in 1923, 1933, 1944, 1954, and 1964, and for all minima back to 1823. Even better agreement is obtained by the addition of 0.4 yr to the constant term of Danjons equation, from which it is inferred that the discontinuity in eclipse brightness occurs on the average 4–5 months before sunspot minimum. Predictions of future minima are given, the next one being 1974.9 ± 0.3.

Journal of Geophysical Research | 1976

Intensity of the Fe XV emission line corona, the level of geomagnetic activity, and the velocity of the solar wind

Barbara Bell; Giancarlo Noci

Journal of Geophysical Research | 1966

Dependence of the lunar modulation of geomagnetic activity on the celestial latitude of the Moon

Barbara Bell; Richard J. Defouw

Journal of Geophysical Research | 1964

Concerning a lunar modulation of geomagnetic activity

Barbara Bell; R. J. Defouw

Journal of Geophysical Research | 1954

Geomagnetism and the emission‐line corona

Barbara Bell; Harold Glazer

Journal of Geophysical Research | 1966

On the lunar modulation of geomagnetic activity, 1884–1931 and 1932–1959

Barbara Bell; Richard J. Defouw

Smithsonian Contributions to Astrophysics | 1958

Some sunspot and flare statistics

Barbara Bell; Harold Glazer

Journal of Geophysical Research | 1966

Discussion of paper by M. E. Rassbach, A. J. Dessler, and A. G. W. Cameron, ‘The lunar period, the solar period, and K p’

Barbara Bell; Richard J. Defouw

Archive | 1962

On Short-Period Relations Between North-South Asymmetry in Spottedness and in Great-Storm Sources

Barbara Bell; John G. Wolbach

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John G. Wolbach

Harvard University

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Richard J. Defouw

Harvard University

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Donald H. Menzel

Harvard University

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