Abstract Details
| Name: Manoj Puravankara Affiliation: TIFR, Mumbai Conference ID: ASI2019_305 Title : Demographics of exoplanetary systems: A tale of three different planet populations Authors and Co-Authors : Manoj Puravankara (TIFR), Mayank Narang (TIFR), Ravinder Banyal (IIA), Gayathri Viswanath (Christ Univ.), Blesson Mathew (Christ Univ.), Sireesha Chamarthi (IIA), T. Sivarani (IIA), Athira Unni (IIA) & S. P. Rajaguru (IIA) Abstract Type : Poster Abstract Category : Stars, ISM and Galaxy Abstract : The current count of confirmed exoplanets is set to cross 4000. It is now possible to carry out statistically meaningful demographic studies of exoplanets. Based on the planet properties (e.g. radius, mass) and planetary system architecture (e.g. orbital period), exoplanetary systems roughly separate into three different populations: (1) gas giants and rocky planets around main sequence stars at orbital distances of < 1 AU; (2) gas giants around evolved stars (subgiants and red giants) at orbital distances of a few AU; (3) super-Jupiter planets at few tens of AU around relatively young stars. Most of the studies so far have been focussed on the first population, and the other two populations that probe different but complementary parameter space are only poorly studied as a group. We have been carrying out a comparative study of the occurrence, architecture and host star properties of these three planet populations. Preliminary results suggest that the results obtained for the first population of compact planetary systems orbiting main sequence stars do not hold for the other two populations. In this contribution, I will present our main results and discuss their implications for the formation and evolution of planetary systems. |