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Avivah Yamani
langitselatan.com
Mathematics

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Probability of Finding Terrestrial Planet Within Habitable Zone of Extrasolar Planetary System Ratna Satyaningsih; Taufiq Hidayat; Avivah Yamani; Budi Dermawan
Jurnal Matematika & Sains Vol 15, No 2 (2010)
Publisher : Institut Teknologi Bandung

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Abstract

Habitable zone in a planetary system is defined as the region around a star where life-supporting planets can exist. Typically it requires the presence of liquid water on the planetary surface. Considering the formation of planetary systems, we investigate how stellar mass affects the probability of terrestrial planets formed within habitable zone. We use our Planetary System Generator code (Yamani, 2007) to generate planetary systems by investigating its sensitivity through several parameters, such as stellar mass, stellar luminosity, and effective temperature. The probability of finding terrestrial planets within the habitable zone of extrasolar planetary system has been then calculated. We selected the exoplanet systems: Gl 581, HD 128311, 55 Cnc, 47 UMa, and Ups And-like to evaluate the presence of planets within their habitable zone. 
A Monte Carlo Modeling of Planetary Formation: A Case of 47 Ursae Majoris System Avivah Yamani; Taufiq Hidayat; Ratna Satyaningsih; Budi Dermawan
Jurnal Matematika & Sains Vol 15, No 2 (2010)
Publisher : Institut Teknologi Bandung

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This paper presents a Monte Carlo simulation, using Planetary System Generator, which has been built based on a simple accretion model by Dole (1970) and by considering the present structure of the Solar System. Data of known extrasolar planets have also been taken into account.   It was then applied to generate 47 Ursae Majoris (47UMa)-like planetary systems. The results are subsequently compared to the observed data of 47UMa. The dynamical evolution as well as the stability of the system have been evaluated by using a n-body formalism accounted for in our simulation. The generated system reproduced approximately the observational data and suggests that some other accompanying planets may exist. The orbital evolution is also found to be stable within the current age of the system.
Co-Authors Budi Dermawan Ratna Satyaningsih Taufiq Hidayat