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@article{1412242,
author = {Hümmerich, Stefan and Niemczura, Ewa and Walczak, Przemyslaw and Paunzen, Ernst and Bernhard, Klaus and Murphy, Simon and Drobek, Dominik},
article_location = {MALDEN},
article_number = {2},
doi = {http://dx.doi.org/10.1093/mnras/stx2974},
keywords = {stars: abundances; stars: atmospheres; stars: chemically peculiar; stars: individual: KIC 6128830; stars: variables: general},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {A spectroscopic and photometric investigation of the mercury-manganese star KIC 6128830},
url = {http://dx.doi.org/10.1093/mnras/stx2974},
volume = {474},
year = {2018}
}
TY - JOUR
ID - 1412242
AU - Hümmerich, Stefan - Niemczura, Ewa - Walczak, Przemyslaw - Paunzen, Ernst - Bernhard, Klaus - Murphy, Simon - Drobek, Dominik
PY - 2018
TI - A spectroscopic and photometric investigation of the mercury-manganese star KIC 6128830
JF - Monthly Notices of the Royal Astronomical Society
VL - 474
IS - 2
SP - 2467-2478
EP - 2467-2478
PB - WILEY
SN - 00358711
KW - stars: abundances
KW - stars: atmospheres
KW - stars: chemically peculiar
KW - stars: individual: KIC 6128830
KW - stars: variables: general
UR - http://dx.doi.org/10.1093/mnras/stx2974
N2 - 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.
ER -
HÜMMERICH, Stefan, Ewa NIEMCZURA, Przemyslaw WALCZAK, Ernst PAUNZEN, Klaus BERNHARD, Simon MURPHY a Dominik DROBEK. A spectroscopic and photometric investigation of the mercury-manganese star KIC 6128830. \textit{Monthly Notices of the Royal Astronomical Society}. MALDEN: WILEY, 2018, roč.~474, č.~2, s.~2467-2478. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stx2974.
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