Modelling the Distribution of Comets in Extrasolar Systems
- Author(s)
- Birgit Loibnegger, Nader Haghighipour
- Abstract
In the last years observations of absorption lines in spectra of stars varying on short time scales accumulate. Scientists refer to these findings as features caused by objects evaporating material on their orbit close to the star and thus call them comets in exoplanetary systems - exocomets. The aim of our investigation is to find a statistical model for the scattering of small objects which shows the most probable whereabouts of these objects after the gravitational interaction with planets. We discuss the effect of different forces acting on the comets, as there is gravitational influence of the galactic tide and passing stars. We also compare the scattering process with and without migration of the giant planet. We found Kuiper belt and Oort cloud like structures depending on the mass, orbit, and migration of the giant planet as well as on the mass of the central star and the initial distribution of planetesimals.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- University of Hawaii at Manoa
- Publication date
- 09-2018
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/0cd06de8-26ae-496d-a9f1-814f536f44a6