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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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