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Peer-reviewedCC BY 4.0The Astrophysical Journal

Tidally Perturbed Pulsations in OO Dra

  • Niveditha Parthasarathy1
  • Mikhail Kovalev2,3,4
  • Randa Asa’d1
4 affiliations
  1. 1American University of Sharjah
  2. 2China Academy of Sciences
  3. 3Chinese Academy of Sciences
  4. 4International Centre of Supernovae
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Abstract

We perform a pulsation analysis of OO Dra using light-curve data from TESS and present the first identification of six dipole modes as doublets from the primary star in OO Dra. The phases and amplitudes of these pulsation modes were analytically reconstructed. Among the six identified doublets, four are pulsating in Y 10 x mode with a pulsation axis along the tidal axis, and two in Y 10 y with a pulsation axis orthogonal to the tidal axis and the angular momentum axis. Our findings suggest that the primary star in a nonsynchronized, post-mass-transfer OO Dra could be a tidally tilted δ Scuti pulsator.

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Cite

BibTeXRIS
BibTeX
@article{parthasarathy2026tidally,
  title = {{Tidally Perturbed Pulsations in OO Dra}},
  author = {Niveditha Parthasarathy and Mikhail Kovalev and Randa Asa’d},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = nov,
  doi = {10.3847/1538-4357/aeac4c},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aeac4c},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Tidally Perturbed Pulsations in OO Dra
AU  - Niveditha Parthasarathy
AU  - Mikhail Kovalev
AU  - Randa Asa’d
PY  - 2026
DA  - 2026/11/05
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aeac4c
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aeac4c
AB  - We perform a pulsation analysis of OO Dra using light-curve data from TESS and present the first identification of six dipole modes as doublets from the primary star in OO Dra. The phases and amplitudes of these pulsation modes were analytically reconstructed. Among the six identified doublets, four are pulsating in Y 10 x mode with a pulsation axis along the tidal axis, and two in Y 10 y with a pulsation axis orthogonal to the tidal axis and the angular momentum axis. Our findings suggest that the primary star in a nonsynchronized, post-mass-transfer OO Dra could be a tidally tilted δ Scuti pulsator.
SN  - 1538-4357
SN  - 0004-637X
ER  -