| Author(s) and Co-Author(s) with Affiliation: Goldy Ahuja(Physical Research Laboratory, Ahmedabad, Gujarat 380009, India), Shashikiran Ganesh(Physical Research Laboratory, Ahmedabad, Gujarat 380009, India) |
| Abstract: Comets are the perfect objects to study the evolutionary beginnings of our solar system. Observational techniques such as Photometry, Spectroscopy, and Polarimetry provide insight into the physical and chemical properties of these objects, which help us understand their composition at the time of their formation. However, since the Solar System has evolved over time due to the migration of the giant planets, these bodies have been scattered outwards. Currently, there are two active reservoirs, which are the source of these objects. One is the Kuiper Belt, and the other is the Oort Cloud. Objects residing in the outer Oort Cloud (a > 25000 au) have a period of around a few million to tens of millions of years and form a distinct subclass in the Oort Cloud, known as Dynamically New Comets. Studying these objects is crucial, as they have never returned to the inner solar system. These bodies were ejected from the inner solar system after their formation, remaining in a state of deep freeze in the outer Oort Cloud. This is where the dynamical simulation becomes important, as the orbital parameters of the comets are affected once they enter the inner solar system due to various perturbative forces. The orbital evolution of these bodies in the presence of various forces, apart from gravity, such as Non-gravitational accelerations from their own outgassing, galactic tidal effects, and stellar perturbations, can reveal their exact orbital parameters and the possible origin, thereby verifying their “dynamically new” status. Observational studies of confirmed dynamically new comets can help explain the chemical and physical composition of the early solar system. Hence, it is important to study the orbital evolution of newly discovered comets at an early stage after their discovery. In this presentation, we'll discuss results from our recent studies of a sample of comets. |
