![]() |
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Evolutionary link between Red Supergiants and Luminous Blue variable is interesting, but still poorly understood. We present the results of study of the Galactic candidate luminous blue variable Wray 15-906, revealed via detection of its infrared circumstellar shell (of ≈ 2 pc in diameter) with the Wide-field Infrared Survey Explorer (WISE) and the Herschel Space Observatory. Using the stellar atmosphere code CMFGEN and the Gaia parallax, we found that Wray 15-906 is a relatively low-luminosity, log(L/ L⊙) ≈ 5.4, star of temperature of 25 ± 2 kK. In the framework of single star evolution, the obtained results suggest that Wray 15-906 is a post-red supergiant star with initial mass of ≈ 25 M⊙ and that before exploding as a supernova it could transform for a short time into a WN11h star. The presence of shell with mass 2.9 ± 0.5 M⊙ indicates that Wray 15-906 has suffered substantial mass loss in the recent past.