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Study of the late nitrogen-sequence Galactic Wolf-Rayet star WR156. Spectropolarimetry and modeling

Afanasiev, V. L.; Panchuk, V. E.; Maryeva, O. V.

For the first time spectropolarimetric observations of Wolf-Rayet star WR156 (WN8h sub-class) were conducted. Medium resolution spectropolarimetric data in the range of 3500-7200 ÅÅ were obtained at 6-m BTA telescope of Special Astrophysical Observatory RAS (SAO RAS) using recently commissioned SCORPIO-2 spectrograph. These data show that the ligh…

Elemental abundances of the supergiant stars σ Cygnus and η Leonis

Tanrıverdi, Taner

This study aims to analyse the elemental abundances for the late B type supergiant star σ Cyg and the early A-type supergiant η Leo using ATLAS9 (Kurucz, 1995; Sbordone et al., 2004), assuming local thermodynamic equilibrium (LTE). The spectra used in this study are obtained from Dominion Astrophysical Observatory and have high resolution and sign…