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Sigma Scorpii + LBN 1104
Sigma Scorpii + LBN 1104
Credit: Giuseppe Donatiello
Sigma Scorpii is a double-lined spectroscopic binary system consisting of two B-type stars residing in an eccentric orbit. The more massive primary component is a Beta Cep-type pulsating variable star.
The disentangled spectra reveals two stars of similar spectral type and atmospheric chemical composition. Combined with the orbital inclination angle estimate found in the literature, the orbital elements allow a mass estimate of 14.7 +/- 4.5 and 9.5 +/- 2.9 solar mass for the primary and secondary component, respectively (A. Tkachenko et al. 2014)
Sigma Scorpii + LBN 1104
Sigma Scorpii + LBN 1104
Credit: Giuseppe Donatiello
Sigma Scorpii is a double-lined spectroscopic binary system consisting of two B-type stars residing in an eccentric orbit. The more massive primary component is a Beta Cep-type pulsating variable star.
The disentangled spectra reveals two stars of similar spectral type and atmospheric chemical composition. Combined with the orbital inclination angle estimate found in the literature, the orbital elements allow a mass estimate of 14.7 +/- 4.5 and 9.5 +/- 2.9 solar mass for the primary and secondary component, respectively (A. Tkachenko et al. 2014)