Browsing by Subject "Ultraviolet Astronomy"

Now showing items 1-4 of 4

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 ...
IUE observations of high galactic latitude F supergiants HD 161796 and HD 187885

Parthasarathy, M; Pottasch, S. R; Wamsteker, W (European Southern Observatory, 1988-09)

Low resolution (6 A) IUE ultraviolet spectra of the high galactic latitude F supergiants HD 161796 (F3 Ib) and HD 187885 (F2-3I) are analyzed. The UV spectrum (1250 A to 3250 A) of HD 161796 shows no excess UV flux ...
Observations of hydrogen deficient binary Upsilon Sagittarii

Kameswara Rao, N; Venugopal, V. R (Indian Academy of Sciences, 1985-06)

The absolute magnitude M(v) of the hydrogen deficient binary Upsilon Sgr has been estimated as -4.8 + or - 1.0 from the distribution of the interstellar reddening, polarization, and interstellar lines of the surrounding ...
Observations of late-type stars with 'hot' companions

Gilra, D. P; Wesselius, P. R; Kameswara Rao, N (European Space Agency, 1980)

IUE and ANS observations of the 'hot' companions of o Ceti є Aur, and  Pup are briefly discussed. Observations of HD 62001, the central star of the nebula VV 1-7 are also reported. The nebula VV 1-7 which is present on ...

Search DSpace