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Complex Analysis of the Stellar Binary HD25811: A Subgiant System

Al-Wardat, Mashhoor A.; Widyan, Hatem S.; Al-thyabat, Ahmed

The visually close binary system HD25811 is analysed to estimate its physical and geometrical parameters in addition to its spectral type and luminosity class. The method depends on obtaining the best fit between the entire observational spectral energy distribution (SED) of the system and synthetic SEDs created by atmospheric modelling of the ind…

Verification of the Spectral Classification of Stars Using the Hipparcos Catalogue

Deb, D.; Chakraborty, P.

The spectral classifications of the stars from spectral data have been corrected from time to time and new spectral and luminosity classes have been assigned. Identifying stars with wrong spectral and luminosity classification has been a stupendous task from the huge catalogue of stars. In this work we describe a simple statistical technique to id…