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Simulation, detection and characterisation of monotransits from the TESS mission
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Cooke, Benjamin F. (2021) Simulation, detection and characterisation of monotransits from the TESS mission. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b3678558~S15
Abstract
The discovery of exoplanets is a key astrophysics goal. I begin in Chapter 3 with details of two new planets from the WASP survey; WASP-150b, a 1.1RJ hot Jupiter on a 5.6 day orbit, and WASP-176b, a 1.5RJ hot Jupiter on a 3.9 day orbit.
The exploration of longer period systems, such as those more similar to Earth, requires more effort. One method, explored extensively in this thesis is the use of monotransits. In Chapters 4 and 5 I describe simulations to predict the yield of monotransiting systems from TESS. The results indicate a significant number of detections, on the order of several hundred per hemisphere, with a key result being that monotransits outnumber multitransits for periods ≥ 30 days.
The use of multiple instruments to characterise exoplanet systems is common practise and in Chapter 6 I explore using CHEOPS to follow-up monotransits identified in TESS. I show that CHEOPS could follow-up 90% of the monotransits and would observe additional transits for the majority.
Monotransits, and exoplanets in general, are usually followed-up with a combination of photometry and spectroscopy. In Chapter 7 I examine the idea of using these two methods to follow-up poorly constrained exoplanet systems in a general manner. I show that photometry and spectroscopy are each preferred for different regions of exoplanet parameter space.
Chapter 8 extends the TESS monotransit simulations and explores using follow-up on the recurring systems. I show that ∼400 planets will transit once in each of the primary and extended TESS missions but each has an average of 38 period aliases. I show that photometric and spectroscopic observations are both capable of resolving these aliases.
Finally, Chapter 9, details the efforts of the NGTS monotransit working group to identify monotransits in the TESS data and characterise them using follow-up techniques. I describe the methods used and some of the key results including NGTS-11b.
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Library of Congress Subject Headings (LCSH): | Extrasolar planets -- Detection, Transits, Astronomical photometry | ||||
Official Date: | April 2021 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Department of Physics | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Pollacco, Don | ||||
Format of File: | |||||
Extent: | xiii, 236 leaves : illustrations (some colour) | ||||
Language: | eng |
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