Surprising variations in the rotational periods of CP stars CU Virginis and V901 Orionis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F12%3A00057251" target="_blank" >RIV/00216224:14310/12:00057251 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Surprising variations in the rotational periods of CP stars CU Virginis and V901 Orionis
Original language description
We studied the stability of the periods of well observed mCP stars CU Vir and V901 Ori using all accessible data containing phase information. We found that both stars exhibit alternating intervals of rotational braking and acceleration. We propose thatdynamical interaction between a thin, outer magnetically-confined envelope, braked by the stellar wind, with an inner stellar body is able to explain the observed rotational instability. A theoretically unexpected alternating variability in these stars would remove the spin-down paradox and brings a new insight into structure and evolution of some magnetic upper-main sequence stars.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA205%2F08%2F0003" target="_blank" >GA205/08/0003: Mass-loss rate predictions for hot stars</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů