TESS Light Curve Analysis: A Case Study of Stellar Rotation in TIC 445493624
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918141639000064 |
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| author | Paudel, Pratik Chhatkuli, Daya Nidhi Sharma, Bikash Khanal, Ashish Khatri, Nabaraj Rai, Divash |
| author_facet | Paudel, Pratik Chhatkuli, Daya Nidhi Sharma, Bikash Khanal, Ashish Khatri, Nabaraj Rai, Divash |
| contents | Stellar rotation is a fundamental parameter governing a star's magnetic activity and evolution. The Transiting Exoplanet Survey Satellite (TESS) provides high-precision photometric data ideal for measuring rotation periods via brightness modulations from starspots. This paper presents a detailed analysis of the star TIC 445493624 using 2-minute cadence data from TESS Sector 58. We process the light curve using a custom pipeline to perform outlier removal, binning, and Savitzky-Golay detrending to isolate the stellar variability. A Lomb-Scargle periodogram of the cleaned data reveals a single, dominant periodic signal at 3.638 days with a power of 0.43, corresponding to a negligible false-alarm probability. The phase-folded light curve at this period is highly coherent and exhibits a stable, non-sinusoidal morphology indicative of large-scale magnetic features or spot groups. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_12609 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | TESS Light Curve Analysis: A Case Study of Stellar Rotation in TIC 445493624 Paudel, Pratik Chhatkuli, Daya Nidhi Sharma, Bikash Khanal, Ashish Khatri, Nabaraj Rai, Divash Solar and Stellar Astrophysics Stellar rotation is a fundamental parameter governing a star's magnetic activity and evolution. The Transiting Exoplanet Survey Satellite (TESS) provides high-precision photometric data ideal for measuring rotation periods via brightness modulations from starspots. This paper presents a detailed analysis of the star TIC 445493624 using 2-minute cadence data from TESS Sector 58. We process the light curve using a custom pipeline to perform outlier removal, binning, and Savitzky-Golay detrending to isolate the stellar variability. A Lomb-Scargle periodogram of the cleaned data reveals a single, dominant periodic signal at 3.638 days with a power of 0.43, corresponding to a negligible false-alarm probability. The phase-folded light curve at this period is highly coherent and exhibits a stable, non-sinusoidal morphology indicative of large-scale magnetic features or spot groups. |
| title | TESS Light Curve Analysis: A Case Study of Stellar Rotation in TIC 445493624 |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2509.12609 |