Wray 15-906 low mass Luminous Blue Variable on a pre-supernova stage

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00582652" target="_blank" >RIV/67985815:_____/22:00582652 - isvavai.cz</a>
Result on the web
<a href="http://www.inasan.ru/wp-content/uploads/2022/02/VAK_2021_.pdf#page=179" target="_blank" >http://www.inasan.ru/wp-content/uploads/2022/02/VAK_2021_.pdf#page=179</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Wray 15-906 low mass Luminous Blue Variable on a pre-supernova stage
Original language description
Evolutionary link between Red Supergiants and Luminous Blue variables 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.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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