Resolving the kinematics of the discs around Galactic B[e] supergiants

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00494398" target="_blank" >RIV/67985815:_____/18:00494398 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/sty1747" target="_blank" >http://dx.doi.org/10.1093/mnras/sty1747</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/sty1747" target="_blank" >10.1093/mnras/sty1747</a>

Result language
angličtina
Original language name
Resolving the kinematics of the discs around Galactic B[e] supergiants
Original language description
B[e] supergiants arc luminous evolved massive stars. The mass-loss during this phase creates a complex circumstellar environment with atomic, molecular, and dusty regions usually found in rings or disc-like structures. For a better comprehension of the mechanisms behind the formation of these rings, detailed knowledge about their structure and dynamics is essential. To address that, we obtained high-resolution optical and near-infrared (near-IR) spectra for eight selected Galactic B[e] supergiants, for which CO emission has been detected. Assuming Keplerian rotation for the disc, we combine the kinematics obtained from the CO bands in the near-IR with those obtained by fitting the forbidden emission [OI]):lambda 5577, [OI] lambda lambda 6300,6363, and [Ca II] lambda lambda 7291,7323 lines ill the optical to probe the disc structure. We find that the emission originates from multiple ring structures around all B[e] supergiants, with each one of them displaying a unique combination of rings regardless of whether the object is part of a binary system. The confirmed binaries display spectroscopic variations of their line intensities and profiles as well as photometric variability, whereas the ring structures around the single stars are stable.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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