The Yellow Hypergiants HR 8752 and rho Cassiopeiae near the Evolutionary Border of Instability
High-resolution near-ultraviolet spectra of the yellow hypergiants HR 8752 and rho Cassiopeiae indicate high effective temperatures, placing both stars near the low-T_eff border of the ``yellow evolutionary void.'' At present, the temperature of HR 8752 is higher than ever. For this star we found T_eff=7900+/-200 K, whereas rho Cassiopeiae has T
Israelian, G. et al.
Fecha de publicación:
10
1999