Skip to content
DraconiticResearch
Search Sources API
203,234 studies31 sourcesUpdated 1 h ago
Peer-reviewedCC BY 4.0The Astrophysical Journal

KIC 7211759: A Rapidly Rotating δ Sct–γ Dor Hybrid Pulsator

  • Shuguo Ma1,2
  • A-Li Luo1,3
  • Peng Wei2
  • Chenglong Lv2
  • Antonio García Hernández4
  • Ming Yang5
  • Xiao Kong1
  • Haozhi Wang1
  • Yingzhen Cui1
  • Hailong Yuan1
  • Jun-Chao Liang1,3
  • Shuo Li1,3
10 more authors
  • Minghui Jia1,3
  • Wen Hou1
  • Qi Ge6
  • Yinbi Li1
  • Daoye Yang1,2,3
  • Ali Esamdin2,3
  • Yunxiao Jia3,1
  • Shuo Ye1,3
  • Fei Dang2
  • Hao Zeng1,3
6 affiliations
  1. 1Chinese Academy of Sciences
  2. 2Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011,
  3. 3University of Chinese Academy of Sciences
  4. 4Universidad de Granada, Campus de Fuentenueva s/n
  5. 5Tongji University
  6. 6Hebei Normal University
Open at sourcePDFDOICite

Abstract

KIC 7211759 is a rapidly rotating δ Sct– γ Dor hybrid pulsator. Based on high-precision photometric data from the Kepler and TESS missions, we conduct a systematic asteroseismic study of this star. We detect a pulsation spectrum spanning a broad frequency range from low-frequency gravity modes to high-frequency pressure modes (0.6–90 day ⁻¹ ). Long-term amplitude and phase modulations have been observed in the dominant pulsation modes, exhibiting features distinct from known systematic effects. Our analysis confirms that these modulations arise from beating between closely spaced frequency components. By combining the Fourier transform, autocorrelation function, and histogram of frequency differences methods, we identify the p -mode large separation to two candidate values and constrain two candidate period spacings for g -modes. In addition, we infer a likely rotation frequency of ν rot ≈ 2.2237 day ⁻¹ from the low-frequency signals. Further constraints from stellar evolution models, incorporating Δ ν , Δ P g , and fundamental atmospheric parameters, yield a mass of 1.70 ± 0.08 M ⊙ , a radius of 2.28 ± 0.27 R ⊙ , and and an age of 1.19 ± 0.04 dex, placing the star at the evolutionary stage just past the second turning point of the main sequence.

Related

  1. MAXI J1820+070: A rapidly rotating black hole with a mildly truncated disk and warm corona layers in the soft state
    Th. V. Papavasileiou, T. S. Kosmas, O. Kosmas +1
    Astronomy & AstrophysicsPeer-reviewedPublisher termsSolar & stellar physicsCrossref
  2. General Relativistic Simulations of the Nonlinear Evolution of r-modes in Rapidly Rotating Neutron Stars
    Justin K. Yu, Andrew Melatos
    arXivPreprintarXiv licenceFull textHigh-energy astrophysicsGravitation & general relativityarXiv
  3. Internal heating in rapidly rotating convection is not a shortcut to geostrophic turbulence
    Justin A. Nicoski, Tobias G. Oliver, Stefano Maffei +1
    arXivPreprintCC BY 4.0Full textPlanetary science & exoplanetsSolar & stellar physicsarXiv
  4. Finite-Element Asteroseismology I: Two-Dimensional Adiabatic Oscillations of Rapidly Rotating N=3 Polytropes
    Zhao Guo, Adrian J. Barker
    arXivPreprintarXiv licenceFull textSolar & stellar physicsarXiv
  5. Stellar Yields of Rapidly Rotating Population III Stars for the High Redshift Universe
    Devesh Nandal, Konstantinos Topalakis, Vasilisa Sergienko +6
    arXivPreprintCC BY 4.0Full textGalaxiesSolar & stellar physicsarXiv

Cite

BibTeXRIS
BibTeX
@article{ma20267211759,
  title = {{KIC 7211759: A Rapidly Rotating δ Sct–γ Dor Hybrid Pulsator}},
  author = {Shuguo Ma and A-Li Luo and Peng Wei and Chenglong Lv and Antonio García Hernández and Ming Yang and Xiao Kong and Haozhi Wang and Yingzhen Cui and Hailong Yuan and Jun-Chao Liang and Shuo Li and Minghui Jia and Wen Hou and Qi Ge and Yinbi Li and Daoye Yang and Ali Esamdin and Yunxiao Jia and Shuo Ye and Fei Dang and Hao Zeng},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = nov,
  doi = {10.3847/1538-4357/aeae33},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aeae33},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - KIC 7211759: A Rapidly Rotating δ Sct–γ Dor Hybrid Pulsator
AU  - Shuguo Ma
AU  - A-Li Luo
AU  - Peng Wei
AU  - Chenglong Lv
AU  - Antonio García Hernández
AU  - Ming Yang
AU  - Xiao Kong
AU  - Haozhi Wang
AU  - Yingzhen Cui
AU  - Hailong Yuan
AU  - Jun-Chao Liang
AU  - Shuo Li
AU  - Minghui Jia
AU  - Wen Hou
AU  - Qi Ge
AU  - Yinbi Li
AU  - Daoye Yang
AU  - Ali Esamdin
AU  - Yunxiao Jia
AU  - Shuo Ye
AU  - Fei Dang
AU  - Hao Zeng
PY  - 2026
DA  - 2026/11/05
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aeae33
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aeae33
AB  - KIC 7211759 is a rapidly rotating δ Sct– γ Dor hybrid pulsator. Based on high-precision photometric data from the Kepler and TESS missions, we conduct a systematic asteroseismic study of this star. We detect a pulsation spectrum spanning a broad frequency range from low-frequency gravity modes to high-frequency pressure modes (0.6–90 day ⁻¹ ). Long-term amplitude and phase modulations have been observed in the dominant pulsation modes, exhibiting features distinct from known systematic effects. Our analysis confirms that these modulations arise from beating between closely spaced frequency components. By combining the Fourier transform, autocorrelation function, and histogram of frequency differences methods, we identify the p -mode large separation to two candidate values and constrain two candidate period spacings for g -modes. In addition, we infer a likely rotation frequency of ν rot ≈ 2.2237 day ⁻¹ from the low-frequency signals. Further constraints from stellar evolution models, incorporating Δ ν , Δ P g , and fundamental atmospheric parameters, yield a mass of 1.70 ± 0.08 M ⊙ , a radius of 2.28 ± 0.27 R ⊙ , and and an age of 1.19 ± 0.04 dex, placing the star at the evolutionary stage just past the second turning point of the main sequence.
SN  - 1538-4357
SN  - 0004-637X
ER  -