Revisiting the evolved hypergiants in the Magellanic Clouds
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00555510" target="_blank" >RIV/67985815:_____/22:00555510 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stac386" target="_blank" >https://doi.org/10.1093/mnras/stac386</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stac386" target="_blank" >10.1093/mnras/stac386</a>
Alternative languages
Result language
angličtina
Original language name
Revisiting the evolved hypergiants in the Magellanic Clouds
Original language description
In the present study, we revise the evolutionary state of eight hypergiants in the Magellanic Clouds, four of early-A type and four of FG type, and complement the short list of the eruptive post-RSGs termed as yellow hypergiants. We refine the outdated temperatures and luminosities of the stars by means of high-resolution spectroscopy with the Fiber-fed Extended Range Optical Spectrograph (FEROS). The A-type stars are suggested to be in their early, post-main-sequence phase, showing spectrophotometric characteristics of redward evolving supergiants. On the other hand, the FG-type stars manifest themselves through the enhanced atmospheric activity that is traced by emission filling in H alpha and the dynamical modulation of the low-excitation Ba ii line. Of these stars, the dusty HD269723 is suggested to have recently departed from a cool phase. We identify double-peaked emission in the FEROS data of HD269953 that emerges from an orbiting disc-hosting companion. The highlight of the study is an episode of enhanced mass-loss of HD271182 that manifests as a dimming event in the light curve and renders the star 'modest' analogue to rho Cas. The luminosity log (L/L-circle dot) = 5.6 of HD271182 can serve as an updated threshold for the luminosity of stars exhibiting a post-RSG evolution in the Large Magellanic Cloud.
Czech name
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Czech description
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Classification
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)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
511
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
4360-4376
UT code for WoS article
000760980600002
EID of the result in the Scopus database
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