Mémoire

Abstract

Since the dawn of humanity, our understanding of the universe has evolved through both major breakthroughs and occasional setbacks. The study of exoplanets, however, only began to take shape in the late 20th century, with the advent of modern instruments and detection techniques. Earlier generations of telescopes lacked the necessary sensitivity and stability to detect the subtle signals produced by planets orbiting other stars.

The discovery of 51 Pegasi b by Michel Mayor and Didier Queloz in 1995 marked a milestone, igniting a sustained and growing interest in the field of exoplanetology. Today, the search continues with increasing precision, aiming to identify potentially habitable planets, assess the presence of life beyond Earth, and study young planetary systems to better understand the formation of our own solar system.

In this thesis, I contribute to this ongoing effort by studying the TOI-4552 system, which hosts an Earth-sized planet orbiting a single M-dwarf star. My analysis focuses on extracting key system parameters using the transit photometry method. However, additional follow-up observations will be required to confirm the planetary nature of the candidate. Upon confirmation, the planet may be included in a future publication.