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

Kód výsledku v 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>

Výsledek na webu

<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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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Astronomy at the Epoch of Multimessenger Studies

ISBN

978-5-8037-0848-3

ISSN

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e-ISSN

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Počet stran výsledku

3

Strana od-do

178-180

Název nakladatele

Sternberg Astronomical Institute

Místo vydání

Moscow

Místo konání akce

Moskva

Datum konání akce

23. 8. 2021

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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