ANALISIS PENGARUH EFEK OVERSHOOTING TERHADAP EVOLUSI BINTANG BERMASSA SEDANG
Stellar evolution is a process of changing of stars with time, mainly depends on the mass of the stars, and is depicted on the Hertzsprung-Russel (HR) diagram. This process refers to the large-scale and irreversible changes of the structure and composition of the star. Numerous observations provide...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/63309 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Stellar evolution is a process of changing of stars with time, mainly depends on the mass of the stars, and is depicted on the Hertzsprung-Russel (HR) diagram. This process refers to the large-scale and irreversible changes of the structure and composition of the star. Numerous observations provide evidence in which there are extra mixing in the stars layers that significantly higher than what the standard models has predicted. This exact extra mixing effects is caused by something that is called as convective overshooting. These lead to changing the thermal structure of the star than what’s been predicted, thus can change the compositions abundance of elements in the interior of the star and, overall, can change its final fate. In other words, convective overshooting can make a star appears more massive.
Convective overshooting would slightly shift the HR diagram of the star upwards. In some cases, its effect would ignite the carbon-oxygen core and produce oxygen-neon core before the convective envelope vanishes; hence the ONe white dwarfs. In this final assignment, the effects of convective overshoot towards the intermediate-mass stars will be analyzed; in which the evolution data is obtained by using the MESA-Web, by inputting some parameters that is needed, such as the initial mass of the star and overshooting parameters. |
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