Similarities in the Structure of the Circumstellar Environments of B[e] Supergiants and Yellow Hypergiants

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00478533" target="_blank" >RIV/67985815:_____/17:00478533 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Similarities in the Structure of the Circumstellar Environments of B[e] Supergiants and Yellow Hypergiants
Original language description
Yellow hypergiants (YHGs) and B[e] supergiants (B[e]SGs), though in different phases in their evolution, have many features in common. This is partly due to the fact that both types of objects undergo strong, often asymmetric mass loss, and the ejected material accumulates in shells, rings, or disk-like structures, giving rise to emission from warm molecules and dust. We performed an optical spectroscopic survey of northern Galactic emission-line stars aimed at identifying tracers for the structure and kinematics of circumstellar environments. We identified two sets of lines, [O I] and [Ca II], which originate from the disks of B[e]SGs. The same set of lines is observed in V1302 Aql and V509 Cas, which are both hot YHGs. While V1302 Aql is known to have a disk-like structure, the kinematical broadening of the lines in V509 Cas suggests a Keplerian disk or ring around this star like their hotter B[e]SG counterparts.
Czech name
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Czech description
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Project
<a href="/en/project/GA14-21373S" target="_blank" >GA14-21373S: Unveiling the mass-loss history of evolved massive stars</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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