BINTANG GANDA: GERHANA – BINTANG: PARAMETER DASAR – METODE: NUMERIK – TEKNIK: FOTOMETRI, SPEKTROSKOPI

• Main Author: Nur Rahma, Aliyya
• Format: Final Project
• Language: Indonesia
• Subjects: Astronomi
• Online Access: https://digilib.itb.ac.id/gdl/view/55223
• Institution: Institut Teknologi Bandung

Eclipsing binary is a binary system in which components are seen eclipsing each other from the Earth. Photometric and radial velocity spectroscopy observation of eclipsing binary give variation on brightness (light curve) and radial velocity (velocity curve). Light and radial velocity curve analysis provide physical and geometrical parameters of the star components and their binary system. Those parameters are one of the primary sources for stellar and evolutionary physics, especially in the era of numerous multi-wavelength surveys and the discovery of exotic objects that indicates the involvement of binary system. Physical and geometrical parameters of the binary system could be determined from the observational light curve and radial velocity curve by solving the inverse problem, i.e. finding the fittest model curves with the observational curves. The studied object is CV Boo, a detached eclipsing binary with a period of 0.874 days. PHOEBE (PHysics Of Eclipsing BinariEs) 2.3, an eclipsing binary modeling module, is used for generating model curves and solving the inverse problem. The results of solving the inverse problem in this undergraduate thesis are q = 0.9872+0.0005 ?0.0005, Ts/Tr = 0.96820.0010 ?0.0015, (Rp+Rs)/a = 0.5000+0.0010 ?0.0013, ? = 85.36+0.13 ?0.13 ?, e = 0.0101+0.0004 ?0.0003, i = 91.891+0.073 ?0.07 ?, and a nicely qualitative fit curve with the observation. Several computed models in each inverseproblem solving step given in this undergraduate thesis.