témavezető: Sándor Zsolt Mózes
helyszín (magyar oldal): Department of Astronomy helyszín rövidítés: ELTE
A kutatási téma leírása:
According to the core-accretion hypothesis, the birth of planets begins with the coagulation of dust particles leading to the formation of larger objects such as planetesimals and planetary embryos. At later epochs, the consecutive collisions of these bodies result in the formation of terrestrial planets and solid cores of giant planets. In the case of giant planet formation, the protoplanetary disc should contain a significant amount of gas, therefore the planetary cores and the already formed giant planets gravitationally interact with gas disc resulting in their orbital migration. As a consequence, the semi-major axes of the planets can be changed significantly when still embedded in the gaseous disc, thus their final (observed) positions certainly differ from their formation places. In other words, the main mechanism that shapes the final configuration of planetary systems is certainly the orbital migration.
During the planned doctoral research, the successful candidate(s) will study the type-1 migration that acts to bodies with few tens of Earth mass, and the type-2 migration of Jupiter-like giant planets in various time-evolving disc models, also seeking for new prescriptions for migration (e.g. the heating force). The main task of the proposed study is to reveal the influence of the disc's physical parameters on the final orbital configuration of planetary systems. The role of the X-ray/EUV/FUV photoevaporation due to the protostar, and the effects of the possible planet traps will also be investigated thoroughly. The results obtained by 1D/2D hydrodynamic simulations will be confronted to the already existing large sample of exoplanetary systems.
előírt nyelvtudás: English további elvárások: The applicant should have a MSc in astronomy or physics, show interest in Computational Astrophysics and Celestial Mechanics. Knowledge of programming languages such as C or FORTRAN is expected.
felvehető hallgatók száma: 2
Jelentkezési határidő: 2018-05-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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