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Browsing by Subject "Electron Density (Concentration)"

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Brightness, polarization and electron density of the solar corona of 1980 February 16

Sivaraman, K. R; Jayachandran, M; Scaria, K. K; Babu, G. S. D; Bagare, S. P; Jayarajan, A. P (Indian Academy of Sciences, 1984-06)

During the eclipse of 1980 February 16 the authors photographed the solar corona at an effective wavelength of 6300 Å. Using a quadruple camera coronal pictures were obtained in polarized light for four polaroid orientations. ...
Consequences of a chromospheric temperature rise on the formation of the H-alpha line in late-type supergiants

Mallik, S. G. V; Mallik, D. C. V (Royal Astronomical Society, 1988-08)

Computations of the H-alpha line profiles were performed in a non-LTE moving chromosphere with temperature rise to simulate the observed H-alpha characteristics in G and K supergiants. The comoving frame radiative transfer ...
Density and temperature diagnostics of solar emission lines from NA VII and AL IX

Raju, P. K; Dwivedi, B. N; Gupta, A. K (Springer, 1994-02)

Line intensity ratios of extreme ultraviolet (EUV) emission lines from Na VII and Al IX have been considered for electron density and temperature determinations within the chromosphere-corona transition region and the ...
Density dependence of solar emission lines of boron-like ions

Dwivedi, B. N; Raju, P. K (Kluwer Academic Publishers, 1980-11)

Steady state level densities of 20 levels of the boron-like ions Mg VII and Si X have been computed as a function of electron density and temperature. Collisional and spontaneous radiative processes have been accounted ...
Density dependence of the line source functions in scattering media

Peraiah, A (D. Reidel Publishing Co., 1983-09)

The author has calculated source functions in a scattering medium in which the density changes according to the law of Ne(r) ≡ rn where n takes the value from -3 to +3 and Ne(r) is the electron density. He has assumed that ...
Further spectroscopic observations of SN 1987A

Anupama, G. C; Prabhu, T. P; Ghosh, K. K; Ashoka, B. N; Giridhar, S (Elsevier, 1988)

Spectroscopic observations of SN 1987a obtained during 1987 August 30 – September 8 from Vainu Bappu Observatory, Kavalur, are presented; the spectrum is compared and contrasted with the spectra recorded at earlier epochs. ...
Observations and interpretation of the slowly varying component of solar radio emission at decameter wavelengths

Sastry, Ch. V; Dwarakanath, K. S; Shevgaonkar, R. K; Krishan, V (D. Reidel Publishing Co., 1981-10)

We have observed the slowly varying component of solar radio emission at a frequency of 34.5 MHz with half power beam widths of 26/40 in the east-west and north-south directions, respectively. It is found that the observed ...
The radio brightness of the undisturbed outer solar corona in the presence of a radial magnetic field

Golap, K; Sastry, Ch. V (Springer, 1994-03)

The radio brightness of the quiet outer solar corona at a frequency of 35 MHz in the presence of a radial magnetic field is computed. It is found that the brightness temperature of the ordinary radiation increases ...
Spectrophotometry of Nova Coronae Austrinae, 1981

Shylaja, B. S (D. Reidel Publishing Co., 1984-10)

Spectrophotometric observations of Nova Coronae Austrinae 1981, during its nebular phase are reported. The various emission lines are identified. The electron densities and the mass of the ionized hydrogen in the shell ...
Spectroscopic observations of delta orionis

Singh, M (Kluwer Academic Publishers, 1982-10)

The H α profile in the spectrum of δ Orionis shows phase-dependent changes, with a period of variation equal to the orbital period fo the binary system. The profile shape changes from a normal absorption profile at zero ...

Browsing by Subject "Electron Density (Concentration)"

Browsing by Subject "Electron Density (Concentration)"

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