Séminaire Exoplanètes / |
| « Detection and characterization of long-period transiting planets » |
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Neda Heidari |
| Among the 5000+ discovered planets, transiting planets (~3900) have a considerable impact on our understanding of the formation and evolution of planetary systems. Such planets, when orbiting a bright host star that allows radial velocity (RV) follow-up, can be accurately characterized in terms of fundamental parameters such as mass and radius, allowing modeling of their internal structure. However, the number of transiting planets with longer periods (>40 days) is very low. Indeed, these planets are particularly difficult to detect. The two methods of radial velocity (RV) and photometry, each have their own unique challenges when it comes to detecting these long-period planets. The RV method requires high-precision measurements over extended periods of time to complete their orbits. While the transit method faces challenges due to both a lower probability of these planets to be transiting and also insufficient baseline observations in most photometric surveys. As a result, the study of planet demographics, formation, evolution, and star-planet relations is hampered by the absence of these populations (Winn 2011; Johnson et al. 2010). To address this issue, a systematic effort for detecting this "missing population" is crucial. In this talk, I will present a summary of my past/ongoing projects on the detection and characterization of transiting planets with a focus on longer-period planets. |
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mardi 9 mai 2023 - 14:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |