000006527 001__ 6527
000006527 005__ 20231204122940.0
000006527 037__ $$aSCART-2023-0166
000006527 100__ $$aJurkovic, Monika I.
000006527 245__ $$aType II and anomalous Cepheids in the Kepler K2 mission
000006527 260__ $$c2023
000006527 520__ $$aWe present the results of the analysis of Type II and anomalous Cepheids using the data from the Kepler K2 mission. The precise light curves of these pulsating variable stars are the key to study the details of their pulsation, such as the period-doubling effect or the presence of additional modes. We applied the Automated Extended Aperture Photometry (autoEAP) to obtain the light curves of the targeted variable stars which were observed. The light curves were Fourier analysed. We investigated 12 stars observed by the K2 mission, seven Type II, and five anomalous Cepheids. Among the Type II Cepheids, EPIC 210622262 shows period-doubling, and four stars have modulation present in their light curves which are different from the period-doubling effect. We calculated the high-order Fourier parameters for the short-period Cepheids. We also determined physical parameters by fitting model atmospheres to the spectral energy distributions. The determined distances using the parallaxes measured by the Gaia space telescope have limited precision below 16 mag for these types of pulsating stars, regardless if the inverse method is used or the statistical method to calculate the distances. The BaSTI evolutionary models were compared to the luminosities and effective temperatures. Most of the Type II Cepheids are modelled with low metallicity models, but for a few of them solar-like metallicity ([Fe/H] = 0.06) model is required. The anomalous Cepheids are compared to low-metallicity single stellar models. We do not see signs of binarity among our sample stars.
000006527 594__ $$aNO
000006527 700__ $$aPlachy, Emese
000006527 700__ $$aMolnar, Lazlo
000006527 700__ $$aGroenewegen, Martin A. T.
000006527 700__ $$aBodi, Attila
000006527 700__ $$aMoskalik, Pawel
000006527 700__ $$aSzabo, Robert
000006527 773__ $$c642-661$$p MNRAS$$v518$$y2023
000006527 8560_ $$fmartin.groenewegen@ksb-orb.be
000006527 8564_ $$s3482607$$uhttp://publi2-as.oma.be/record/6527/files/JurkovicPlachy_ea_2023MN518_642_T2C_ANCEP_KeplerK2mission.pdf
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000006527 8564_ $$s8487$$uhttp://publi2-as.oma.be/record/6527/files/JurkovicPlachy_ea_2023MN518_642_T2C_ANCEP_KeplerK2mission.jpg?subformat=icon-180$$xicon-180
000006527 905__ $$apublished in
000006527 980__ $$aREFERD