STUDI PENGARUH PERUBAHAN POTENSIAL GRAVITASI BIMASAKTI TERHADADAP EVOLUSI ORBIT DAN SEJARAH PEMBENTUKAN BINTANG PADA SATELIT GALAKSI
The orbit evolution of satellite galaxies around the Bimasakti is influenced by the gravitational potential of the bulge, disc, and halo component of Bimasakti. Study about galaxy formation shows that galaxies in universe experience mass change through merging with another galaxy and dark matter...
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| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/63544 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The orbit evolution of satellite galaxies around the Bimasakti is
influenced by the gravitational potential of the bulge, disc, and halo
component of Bimasakti. Study about galaxy formation shows that
galaxies in universe experience mass change through merging with
another galaxy and dark matter accumulation. The growth of the mass
indicates there is gravitational potential change on galaxies including
Bimasakti with respect to time. Numeric integration toward motion
equation is done using Galpy package applicated on python to track the
orbit evolution of satellite galaxy samples around Bimasakti. The data
needed for the integration are position, radial velocity, and proper motion
of each sample from Gaia DR2. Integration was applied to the static and
time-dependent potential model. Analysis was done through literature
study to find out processes related to star formation history in satellite
galaxies that were influenced by their orbit evolution. The results are star
formation in dwarf spheroidal galaxies (dSphs) more influenced by tidal
interaction with Bimasakti and ram pressures from halo Bimasakti.
Different from luminous dSphs, star formation in the dimmer dSphs
(UFDs) are more likely to be influenced by the reionization in the young
aged universe. |
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