| Name: | Sushmita Deb |
| Affiliation: | Gauhati University |
| Conference ID: | ASI2025_421 |
| Title: | Exploring the structural composition of habitable exoplanets |
| Authors: | Sushmita Deb, Dr. Kaushal Sharma, Samrat Biswas, Dr. Biman Jyoti Medhi |
| Authors Affiliation: | Sushmita Deb, Samrat Biswas, Dr. Biman Jyoti Medhi (Gauhati University, Jhalukbari, Guwahati, India, 781014)
Dr. Kaushal Sharma (Forensic Science Laboratory, Uttar Pradesh, India, 244001) |
| Mode of Presentation: | Poster |
| Abstract Category: | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract: | Examining habitability and interior composition of exoplanets is a key subject for exploring the life sustaining possibility of the extrasolar worlds. Characterizing the planetary structure and atmospheric evolution provides insights regarding the surface condition and long term habitability of these planets. In this study, we conducted a comprehensive analysis of exoplanets in the mass and radius range of 𝑅p ≤4𝑅⊕ and 𝑀p ≤15𝑀⊕ and confirmed 15 of them lying within the extended habitable zone boundaries. We provide the stellar parameter analysis of the host stars and giving a constrained estimation of the stellar physical properties. We employed the MIST isochrones along with the estimated stellar parameters to determine the age of these systems. We also performed the interior structure modeling of the planets to infer their possible composition and structure, constraining the mass fractions of all the four layers: iron core, silicate mantle, water or ice layerand atmosphere. Our model analysis confirms iron-rock core composition for LHS 1140b and TOI 1452b, whereas supports a water rich composition for TOI-1266c, LTT-3780c, LP 791-18c and K2-18b. Futhermore, assuming the exoplanets capable of accreting a gaseous layer, we modelled the initial envelope fraction of the habitable exoplanets to examine their ability to sustain a stable atmosphere over time. The results, obtained from our analysis, provides new insights into the structural and atmospheric properties of the exoplanets lyingwithin the habitable boundaries of their systems. |
