Detectability of exomoons with transit technique from space-based telescopes
1
Issued Date
2022
Copyright Date
2022
Resource Type
Language
eng
File Type
application/pdf
No. of Pages/File Size
xi, 78 leaves : ill.
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Mahidol University
Bibliographic Citation
Thesis (M.Sc. (Physics))--Mahidol University, 2022)
Suggested Citation
Prangsutip Cherdwongsung Detectability of exomoons with transit technique from space-based telescopes. Thesis (M.Sc. (Physics))--Mahidol University, 2022). Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/113937
Title
Detectability of exomoons with transit technique from space-based telescopes
Author(s)
Advisor(s)
Abstract
There are numerous searches for exomoons, moons of exoplanets. The Transit Timing Variation (TTV) and Transit Duration Variation (TDV) techniques are two of the most effective methods for detecting exomoons. Due to the exomoon component, the TTV and TDV signals have distinctive characteristics based on the moon phase when the moon transits within the planetary disc during primary exomoon transit and secondary exomoon transit. This study uses TTV and TDV techniques to search for exomoon signals in exoplanetary systems. We intend to study the TTV and TDV signals of the star-planet-moon models by applying photometric precision of the TESS telescope and comparing the results of fitting TTV and TDV with and without cutting the extraordinary features. Cutting the unusual features in TTV and TDV signals will produce more accurate signals finding for an exomoon than the fitting without cutting the distinct features. The moon period and moon semi-major axis are crucial properties. Small values of the moon period and moon semi-major axis will give results that are closer to actual values if TTV and TDV are fitted with cutting the unique characteristics rather than the fitting without cutting in contrast to the large values of the moon period and the moon's semi-major axis. IMPLICATION OF THESIS: There are several initiatives to find an exomoon. Exomoons have not yet been confirmed. It may be possible to detect an exomoon by analyzing Transit Timing Variation (TTV) and Transit Duration Variation (TDV). The TTV and TDV signals of an exoplanetary system with a moon have peculiar characteristics due to the exomoon's existence. This results in the shape of TTV and TDV signals deviating from theory. The theory explains that the TTV and TDV signals of an exoplanetary system with an exomoon present a sine function characteristic. Previous work suggests that TTV and TDV signals have unique features. The TTV and TDV vary with moon phase evolution in sine function, but two smaller amplitudes are presented over the whole range of moon phases when in moon transits within the planetary disc during primary and secondary exomoon transits. Fitting the TTV and TDV with distinctive features is nonsensical. As expected, the results of this study indicate that removing the peculiar characteristics before fitting the TTV and TDV will result in a close approximation of the theoretical value. We compared the results of fitting TTV and TDV with and without the anomalous features to ensure that removing them would yield a better outcome. The result obtained by deleting the uncommon features is closer to the value from the models of an exoplanetary system with an exomoon that we generated than the result obtained by not removing the strange features. Therefore, we conclude that by eliminating the anomalous features beforehand to fit the TTV and TDV will increase the possibility of detecting an exomoon.
Degree Name
Master of Science
Degree Level
Master's degree
Degree Department
Faculty of Science
Degree Discipline
Physics
Degree Grantor(s)
Mahidol University