| Name: Ashutosh Joshi |
| Affiliation: Tata Institute of Fundamental Research, Mumbai |
| Conference ID: ASI2026_248 |
| Title: ForwardRM : A data driven forward modelling framework for Rossiter-McLaughlin Effect |
| Abstract Type: Poster |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Ashutosh Joshi(Tata Insitute of Fundamental Research, Mumbai - 40005, India), Joe P. Ninan(Tata Institute of Fundamental Research, Mumbai - 400005, India) |
| Abstract: The orbital architectures of exoplanetary systems probe their dynamical evolution. Among various other parameters, the spin-orbit obliquity, i.e. the angle between the planet’s orbital angular momentum and star’s spin angular momentum, provides useful information about the planet migration and planet-planet interaction mechanisms. The Rossiter McLaughlin (RM) effect allows measurement of sky-projected obliquity using time resolved spectroscopy of an exoplanetary transit. We present ForwardRM, a data driven forward model for RM effect measurements. Opposed to the classical RV based methods, this approach models the line distortions in the stellar spectrum during a transit using the information from all the available out of transit spectra of the host star. Modelling the entire spectrum can allow us to introduce different kinds of velocity fields and even features like active regions in the stellar photosphere and study their impact. The line distortion models can also aid the study of transmission spectroscopy. The framework has been successfully tested on available archival spectra taken with NEID spectrograph for the transit of TOI-2076b. |
