Showing items related by title, author, creator and subject.

• Spectrophotometric studies of Ap stars 

  Babu, G. S. D; Shylaja, B. S (D. Reidel Publishing Company, 1982-01)

  Based on the observed energy distribution curves of about a hundred Ap stars, the various relationships among their physical parameters: namely, the temperatue, colour index, bolometric correction and bolometric magnitude ...
• 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 ...
• Planetary nebulae - Origin and evolution 

  Mallik, D. C. V (Astronomical Society of Australia, 1991)

  The review describes some of the progress made in observations and their interpretation, particularly in the context of the evolution of the nebulae and the central stars. It includes a discussion on the improved determinations ...