A spectroscopic and photometric investigation of the mercury-manganese star KIC 6128830

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00102457" target="_blank" >RIV/00216224:14310/18:00102457 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stx2974" target="_blank" >http://dx.doi.org/10.1093/mnras/stx2974</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stx2974" target="_blank" >10.1093/mnras/stx2974</a>

Result language
angličtina
Original language name
A spectroscopic and photometric investigation of the mercury-manganese star KIC 6128830
Original language description
The advent of space-based photometry provides the opportunity for the first precise characterizations of variability in mercury-manganese (HgMn/CP3) stars, which might advance our understanding of their internal structure. We have carried out a spectroscopic and photometric investigation of the candidate CP3 star KIC 6128830. A detailed abundance analysis based on newly acquired high-resolution spectra was performed, which confirms that the star's abundance pattern is fully consistent with its proposed classification. Photometric variability was investigated using 4 yr of archival Kepler data. In agreement with results from the literature, we have identified a single significant and independent frequency f(1) = 0.2065424 d(-1) with a peak-to-peak amplitude of similar to 3.4 mmag and harmonic frequencies up to 5f(1). Drawing on the predictions of state-of-the-art pulsation models and information on evolutionary status, we discuss the origin of the observed light changes. Our calculations predict the occurrence of g-mode pulsations at the observed variability frequency. On the other hand, the strictly mono-periodic nature of the variability strongly suggests a rotational origin. While we prefer the rotational explanation, the present data leave some uncertainty.
Czech name
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Czech description
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Type
Jimp - 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
<a href="/en/project/7AMB17AT030" target="_blank" >7AMB17AT030: The analysis of spotted stars using high precision data</a>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP) S - Specificky vyzkum na vysokych skolach I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

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