KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation
We investigated the pulsating behavior of KIC 10855535 using Kepler 4 yr long-cadence data. Two independent frequencies were detected: a pulsation frequency F0 = 17.733260(5) day ^−1 and a low frequency f _8 = 0.412643(8) day ^−1 . We identify F0 as the fundamental frequency, at which an equidistant...
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2024-01-01
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| author | Li-xian Shen Ali Esamdin Cheng-long Lv Hao-zhi Wang Tao-zhi Yang Rivkat Karimov Shuhrat A. Ehgamberdiev Hu-biao Niu Jin-zhong Liu |
| author_facet | Li-xian Shen Ali Esamdin Cheng-long Lv Hao-zhi Wang Tao-zhi Yang Rivkat Karimov Shuhrat A. Ehgamberdiev Hu-biao Niu Jin-zhong Liu |
| author_sort | Li-xian Shen |
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| description | We investigated the pulsating behavior of KIC 10855535 using Kepler 4 yr long-cadence data. Two independent frequencies were detected: a pulsation frequency F0 = 17.733260(5) day ^−1 and a low frequency f _8 = 0.412643(8) day ^−1 . We identify F0 as the fundamental frequency, at which an equidistant quintuplet is centered, suggesting that the star orbits in a binary system. The fitted orbital parameters align well with those reported in previous literature. Long-term phase modulation caused by binarity has been confirmed by considering the light curve from the Transiting Exoplanet Survey Satellite. By removing the light-time effect, we measured a linear change in period of order $\dot{P}/P\simeq 1.44\times {10}^{-7}\,{\mathrm{yr}}^{-1}$ , a value that could be indicative of stellar evolution. The star also exhibits a gradual and stable amplitude growth, thereby raising the possibility of structural changes during its evolution. We attributed f _8 and its two harmonics to rotation and surface spots, with further analysis suggesting characteristics evolving over time. Based on this hypothesis, KIC 10855535 may rotate slowly for its type, with a speed of 37(2) km s ^−1 . Overall, KIC 10855535 presents an exceptionally clean spectrum and a relatively slow rotation as a δ Sct pulsator, exhibiting a single pulsation mode that undergoes both amplitude and phase modulation. |
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| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-ee4756f14759440e9aee5e6b8ffbea9e2025-08-20T02:18:24ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0197714710.3847/1538-4357/ad8b4cKIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase ModulationLi-xian Shen0https://orcid.org/0009-0003-3618-4841Ali Esamdin1https://orcid.org/0000-0003-1845-4900Cheng-long Lv2https://orcid.org/0000-0001-6354-1646Hao-zhi Wang3https://orcid.org/0000-0002-2463-4943Tao-zhi Yang4https://orcid.org/0000-0002-1859-4949Rivkat Karimov5Shuhrat A. Ehgamberdiev6Hu-biao Niu7Jin-zhong Liu8Xinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaXinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaXinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cnXinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaMinistry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi’an Jiaotong University , Xi’an 710049, People's Republic of ChinaUlugh Beg Astronomical Institute , Uzbekistan Academy of Sciences, Astronomicheskaya 33, Tashkent 100052, UzbekistanUlugh Beg Astronomical Institute , Uzbekistan Academy of Sciences, Astronomicheskaya 33, Tashkent 100052, Uzbekistan; National University of Uzbekistan , Tashkent 100052, UzbekistanXinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cnXinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China ; aliyi@xao.ac.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaWe investigated the pulsating behavior of KIC 10855535 using Kepler 4 yr long-cadence data. Two independent frequencies were detected: a pulsation frequency F0 = 17.733260(5) day ^−1 and a low frequency f _8 = 0.412643(8) day ^−1 . We identify F0 as the fundamental frequency, at which an equidistant quintuplet is centered, suggesting that the star orbits in a binary system. The fitted orbital parameters align well with those reported in previous literature. Long-term phase modulation caused by binarity has been confirmed by considering the light curve from the Transiting Exoplanet Survey Satellite. By removing the light-time effect, we measured a linear change in period of order $\dot{P}/P\simeq 1.44\times {10}^{-7}\,{\mathrm{yr}}^{-1}$ , a value that could be indicative of stellar evolution. The star also exhibits a gradual and stable amplitude growth, thereby raising the possibility of structural changes during its evolution. We attributed f _8 and its two harmonics to rotation and surface spots, with further analysis suggesting characteristics evolving over time. Based on this hypothesis, KIC 10855535 may rotate slowly for its type, with a speed of 37(2) km s ^−1 . Overall, KIC 10855535 presents an exceptionally clean spectrum and a relatively slow rotation as a δ Sct pulsator, exhibiting a single pulsation mode that undergoes both amplitude and phase modulation.https://doi.org/10.3847/1538-4357/ad8b4cVariable starsDelta Scuti variable starsAsteroseismology |
| spellingShingle | Li-xian Shen Ali Esamdin Cheng-long Lv Hao-zhi Wang Tao-zhi Yang Rivkat Karimov Shuhrat A. Ehgamberdiev Hu-biao Niu Jin-zhong Liu KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation The Astrophysical Journal Variable stars Delta Scuti variable stars Asteroseismology |
| title | KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation |
| title_full | KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation |
| title_fullStr | KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation |
| title_full_unstemmed | KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation |
| title_short | KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation |
| title_sort | kic 10855535 an elegant δ scuti pulsator with amplitude and phase modulation |
| topic | Variable stars Delta Scuti variable stars Asteroseismology |
| url | https://doi.org/10.3847/1538-4357/ad8b4c |
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