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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2511.13610 |
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| _version_ | 1866912757164539904 |
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| author | Weerasinghe, Roo |
| author_facet | Weerasinghe, Roo |
| contents | We present the first detailed photometric characterization of TIC 470127886, a previously unstudied multi-periodic variable star discovered in TESS photometry. Analysis of 145,374 high-cadence observations spanning 696 days (944-day baseline, 2023 January-2024 October) across 10 sectors (60, 59, 58, 53, 52, 73, 86, 79, 78, 85) reveals complex periodic variability with a primary period of 5.544527 +/- 0.004307 days and false alarm probability 1.47 x 10^-87. Lomb-Scargle analysis identifies three significant periods at 5.545, 5.801, and 8.874 days with amplitudes of 15,702, 12,772, and 12,670 ppm. The phase-folded light curve shows smooth, sinusoidal morphology consistent with ellipsoidal variation from tidal distortion in a close binary, with no eclipse features. A three-component sinusoidal model, appropriate for ellipsoidal variables, provides excellent fit quality. Validation tests confirm signal authenticity and persistence, and systematic checks verify no contamination from nearby stars (>3 mag fainter). We classify TIC 470127886 as an ellipsoidal variable candidate with 0.70 confidence, with multi-period behavior suggesting additional variability mechanisms beyond tidal distortion. This work demonstrates high-precision characterization of complex multi-periodic variables in TESS photometry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_13610 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-Precision Multi-Period Analysis of the Ellipsoidal Variable Candidate TIC~470127886 from TESS Photometry Weerasinghe, Roo Solar and Stellar Astrophysics We present the first detailed photometric characterization of TIC 470127886, a previously unstudied multi-periodic variable star discovered in TESS photometry. Analysis of 145,374 high-cadence observations spanning 696 days (944-day baseline, 2023 January-2024 October) across 10 sectors (60, 59, 58, 53, 52, 73, 86, 79, 78, 85) reveals complex periodic variability with a primary period of 5.544527 +/- 0.004307 days and false alarm probability 1.47 x 10^-87. Lomb-Scargle analysis identifies three significant periods at 5.545, 5.801, and 8.874 days with amplitudes of 15,702, 12,772, and 12,670 ppm. The phase-folded light curve shows smooth, sinusoidal morphology consistent with ellipsoidal variation from tidal distortion in a close binary, with no eclipse features. A three-component sinusoidal model, appropriate for ellipsoidal variables, provides excellent fit quality. Validation tests confirm signal authenticity and persistence, and systematic checks verify no contamination from nearby stars (>3 mag fainter). We classify TIC 470127886 as an ellipsoidal variable candidate with 0.70 confidence, with multi-period behavior suggesting additional variability mechanisms beyond tidal distortion. This work demonstrates high-precision characterization of complex multi-periodic variables in TESS photometry. |
| title | High-Precision Multi-Period Analysis of the Ellipsoidal Variable Candidate TIC~470127886 from TESS Photometry |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2511.13610 |