Exoplanet Atmospheric Characterization using High-Precision Photometry
The field of Exoplanet is rapidly maturing hour by hour. With present and future proposed telescopes, our understanding of alien worlds is going to get much more profound. The main focus of my thesis is the study of spectral signatures in Photometric observations of exoplanets both in optical and near-IR. This thesis includes a number of investigations on the capability of present and future space-based telescopes in studying and characterizing exoplanet atmospheres. I present Simulations of simultaneous use of observations by HST, TESS, CHEOPS, JWST, and PLATO. It is demonstrated that the atmospheric effects are best measurable for exoplanets around later spectral types. In addition to that, I present an original exploration of the possibility of extracting out spectral features within single-band photometric imaging of stars. It is possible to calibrate the color of the source despite the jitter effects of the telescope. Consequently. there is a possibility of expanding this method to identify exoplanet's atmospheric scattering and stellar activity imprints on the transmission spectrum. Finally, I present a set of Kepler and K2 Ultra Short Period(USP)planets which shows secondary eclipse and phase curve variations. In extension to that I also explored to investigate the overall atmosphere of USPs including the night-side.
Exoplanet Atmospheres, Spectrophotometry, Specklephotometry, Exoplanet Atmospheres, Spectrophotometry, Specklephotometry, Exoplanet Atmospheres, Spectrophotometry, Specklephotometry
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