KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System
| Autor: | Shuguo Ma, Ali Esamdin, Antonio García Hernández, Simon J. Murphy, Chenglong Lv, Peng Wei, Michel Rieutord, Javier Pascual-Granado, Fei Dang, Hubiao Niu, TaoZhi Yang, Guojie Feng, Rivkat Karimov, Yusuf Tillayev |
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| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Ministerio de Ciencia e Innovación (España), European Commission, National Natural Science Foundation of China |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, 2022, 937, ⟨10.3847/1538-4357/ac8c30⟩ |
| ISSN: | 0004-637X 1538-4357 |
| DOI: | 10.3847/1538-4357/ac8c30⟩ |
| Popis: | In this paper, we study the pulsation properties of KIC 3440495 using Kepler and TESS data. A Fourier analysis of the light curve reveals 24 pulsation modes as well as 29 frequencies associated with rotation. The rotation frequency is derived to be frot = 2.322909(2) day−1, and the rotational modulation is determined to be caused by starspots. A large frequency separation of Δν = 54.5 μHz is found by using a Fourier transform, the autocorrelation function, a histogram of frequency differences, and an échelle diagram. We use the large separation to estimate the refined stellar parameters of the star to be v = [239, 279] km s−1, M= [1.5, 1.65] Me, Requator = [2.03, 2.30] Re, Rpolar = [1.72, 1.78] Re, and ω = [0.61, 0.77]. The phase modulations of the pulsating frequencies show a long-term trend which may be attributed to an orbital effect of a binary system; hence, the star may be a fast rotating pulsator in a binary system. KIC 3440495 has an amplitude spectrum similar to Altair, and is identified as a potential sister of Altair. Based on studies of Altair, KIC 3330495 is presumably a young star at a similar evolutionary stage. National Natural Science Foundation of China (NSFC) 12003060 U2031209 Natural Science Foundation of Xinjiang Uygur Autonomous Region 2020D01B59 Chinese Academy of Sciences (CAS) "Light of West China" Program 2021-XBQNXZ-029 "FEDER/Junta de Andalucia-Consejeria de Economia y Conocimiento" by Universidad de Granada E-FQM-041-UGR18 "Programas Estatales de Generacion de Conocimiento y Fortalecimiento Cientifico y Tecnologico del Sistema de I+D+i y de I+D+i Orientada a los Retos de la Sociedad" from the Spanish Ministry of Science, Innovation and Universities (MCIU) PID2019-107061GB-C63 State Agency for Research through the "Center of Excellence Severo Ochoa" award from the Spanish Ministry of Science, Innovation and Universities (MCIU) SEV-2017-0709 |
| Databáze: | OpenAIRE |
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