Browsing Archival Collections by Subject "Chromosphere"

Now showing items 1-4 of 4

A dependence on solar cycle of the size of the Ca/+/ network

Singh, J; Bappu, M. K. V (Springer, 1981-05)

Calcium network diameters are shown to be smaller by 5% at solar maximum than at minimum. The average cell size at minimum is 22,115 + or - 99 km. The average size at solar maximum is 20,920 + or - 112 km, though individual ...
HiRES - A high-resolution stigmatic extreme ultraviolet spectroheliometer for studies of the fine-scale structure of the solar chromosphere, transition region, and corona

Timothy, J. G; Berger, T. E; Morgan, J. S; Walker, A. B. C; Jain, S. K; Saxena, A. K; Bhattacharyya, J. C; Huber, M. C. E; Tondello, G; Naletto, G (SPIE, 1991-08)

HiRES is a high-resolution stigmatic EUV spectroheliometer whose 45-cm Gregory telescope is coupled to a spectrometer employing a single toroidal diffraction grating and an imaging pulse-counting multianode microchannel ...
K emission line widths in the sun and the stars

Bappu, M. K. V; Sivaraman, K. R (Royal Astronomical Society, 1977-02)

K-emission line widths measured with a micrometer on integrated spectra of the sun have a mean value of 38.2 km/s. A definition is proposed whereby the width is a measure in km/s at the inverse-e value of the difference ...
On the presence of radium and the elements of the inactive group in the chromosphere

Evershed, John (Indian Institute of Astrophysics, Bangalore, 1912-09-18)

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