Star Formation History in Solar Neighbourhood

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Jalilvand, Mona | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47291 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Rahvar, Sohrab
Abstract:
Star Formation History (SFH) is one of the important quantities to constrain galaxy formation and evolution scenarios and star formation models. In this thesis we aim to derive SFH for solar neighbourhood stars. We can use absolute magnitude-color diagram of a stellar system to derive the SFH. The method is to consider different functions for SFH and compare the resulting colormagnitude diagram with observational data. We used HIPPARCOS satellite data in this thesis. Hipparcos has measured astrometric parameters for about 120000 stars very accurately, which enables us to compare the color-magnitude of those stars with theoretical color-magnitudes. In this thesis, using Monte Carlo method, we derived the best SFH by considering perturbations around constant SFH. In last chapter, we study the age-velocity dispersion relation for the milky way disk and show that there is no clear relation between mass and velocity dispersion
Keywords:
Velocity Distribution ; Star Formation Rate ; Solar Neighborhood ; Hipparcos Sattelite ; Isothermal Disk