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Collisions beetween Jupiter-like planets

Albertsson, Tobias LU (2010) In Lund Observatory Examensarbeten ASTM31 20101
Lund Observatory
Department of Astronomy and Theoretical Physics
Abstract (Swedish)
Med hjälp av tredimensionella datorsimulationer har vi studerat utfallen från kollisioner mellan planeter. Målet med projektet var att utreda beroendet av kollisionsparametrar som till exempel avståndet vid närmaste passage, hastighet och planeternas massor. Vi kom fram till att planeterna kan bli gravitationellt bundna efter kollisionerna
på grund av energiförluster som gör att de eventuellt kolliderar igen och
sammansmälter. Vissa kollisioner kan även sammansmälta direkt om planeterna kolliderar tillräckligt våldsamt. Där kollisioner inte är tillräckligt våldsamma för att planeterna ska bli bundna
efteråt, kan ändå markanta skillnader i planeternas strukturer observeras. I kollisionerna kommer planeterna förlora både massa och energi,... (More)
Med hjälp av tredimensionella datorsimulationer har vi studerat utfallen från kollisioner mellan planeter. Målet med projektet var att utreda beroendet av kollisionsparametrar som till exempel avståndet vid närmaste passage, hastighet och planeternas massor. Vi kom fram till att planeterna kan bli gravitationellt bundna efter kollisionerna
på grund av energiförluster som gör att de eventuellt kolliderar igen och
sammansmälter. Vissa kollisioner kan även sammansmälta direkt om planeterna kolliderar tillräckligt våldsamt. Där kollisioner inte är tillräckligt våldsamma för att planeterna ska bli bundna
efteråt, kan ändå markanta skillnader i planeternas strukturer observeras. I kollisionerna kommer planeterna förlora både massa och energi, vilket vi bestämmer och undersöker hur det beror på hur nära planeterna är varandra under kollisionen och deras hastigheter.
Result från detta projekt kan hjälpa att förstå vilka typer av kollisioner mellan planeter som kan förekomma och vilka resultat vi kan förvänta oss som kan observeras i framtiden. (Less)
Abstract
Using three-dimensional smoothed particle hydrodynamics (SPH) simulations, we have studied the outcomes from collisions between Jupiter-like planets. Planet models have been generated from polytropic profiles using a polytropic index of n=1 and each planet is represented by 15,000 particles. The dependency on a range of parameters specifying the point of closest approach, velocity at infinity and masses of the planets have been considered and discussed. From a range of collisions, we studied the effect of different collision parameters. After the collision, the planets may become gravitationally bound due to energy loss, and eventually merge. Some collisions might instantly merge if the collision is close enough to head-on. For collisions... (More)
Using three-dimensional smoothed particle hydrodynamics (SPH) simulations, we have studied the outcomes from collisions between Jupiter-like planets. Planet models have been generated from polytropic profiles using a polytropic index of n=1 and each planet is represented by 15,000 particles. The dependency on a range of parameters specifying the point of closest approach, velocity at infinity and masses of the planets have been considered and discussed. From a range of collisions, we studied the effect of different collision parameters. After the collision, the planets may become gravitationally bound due to energy loss, and eventually merge. Some collisions might instantly merge if the collision is close enough to head-on. For collisions not violent enough for the planets to become gravitationally bound, the planets might be disrupted, resulting in small mass loss and two planetary remnants. Most encounters result in some mass loss. The results may help understanding what kind of collisions can occur and the expected outcomes, which can be used to identify possible remnants that could be observed in the future. (Less)
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author
Albertsson, Tobias LU
supervisor
organization
course
ASTM31 20101
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
Lund Observatory Examensarbeten
report number
2010-EXA42
language
English
id
2517816
date added to LUP
2012-04-25 11:37:47
date last changed
2015-08-13 17:05:14
@misc{2517816,
  abstract     = {Using three-dimensional smoothed particle hydrodynamics (SPH) simulations, we have studied the outcomes from collisions between Jupiter-like planets. Planet models have been generated from polytropic profiles using a polytropic index of n=1 and each planet is represented by 15,000 particles. The dependency on a range of parameters specifying the point of closest approach, velocity at infinity and masses of the planets have been considered and discussed. From a range of collisions, we studied the effect of different collision parameters. After the collision, the planets may become gravitationally bound due to energy loss, and eventually merge. Some collisions might instantly merge if the collision is close enough to head-on. For collisions not violent enough for the planets to become gravitationally bound, the planets might be disrupted, resulting in small mass loss and two planetary remnants. Most encounters result in some mass loss. The results may help understanding what kind of collisions can occur and the expected outcomes, which can be used to identify possible remnants that could be observed in the future.},
  author       = {Albertsson, Tobias},
  language     = {eng},
  note         = {Student Paper},
  series       = {Lund Observatory Examensarbeten},
  title        = {Collisions beetween Jupiter-like planets},
  year         = {2010},
}