Critical Analysis of TESS Transit Photometric Data: Improved Physical Properties for Five Exoplanets

Abstract

We present improved physical parameters for four hot Jupiters: KELT-7 b, HAT-P-14 b, WASP-29 b, WASP-95 b, and a hot Neptune: WASP-156 b, by performing critical and rigorous analysis of the time-series observations from the Transiting Exoplanet Survey Satellite (TESS). Being a space-based telescope, the transit photometric data obtained by TESS are free from any noise component due to the interference of Earth's atmosphere. In our analysis of the observed data, we have used critical noise reduction techniques, e.g., the wavelet denoising and Gaussian process regression, in order to effectively reduce the noise components that arise from other sources, such as various instrumental effects and the stellar activity and pulsations. The better quality of photometric data from TESS, combined with our state-of-the-art noise reduction and analysis technique, has resulted into more accurate and precise values of the physical properties for the target exoplanets than that reported in earlier works.

arXiv comment19 pages, 6 figures, Accepted for publication in The Astronomical Journal

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• Transit Light-curves for Exomoons: Analytical Formalism
• Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties
• Precise Transit Photometry Using TESS: Updated Physical Properties for 28 Exoplanets Around Bright Stars
• A High Geometric Albedo for LTT9779b Points Towards a Metal-rich Atmosphere and Silicate Clouds
• Converting the sub-Jovian desert of exoplanets to a savanna with TESS, PLATO and Ariel