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You searched for id:"oai:escholar.manchester.ac.uk:uk-ac-man-scw-318008". One record found.

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University of Manchester

1. Harjani, Suheil. On the ages and evolution of exoplanetary systems.

Degree: 2019, University of Manchester

Exoplanetary science is a growing field in astrophysics, however the ages of planet hosts and the future evolution of systems are not well understood. This thesis looks at better constraining the ages of hot (T eff > 6000\,K), intermediate-mass (1.1 to 1.6\,M_\odot) host stars using stellar evolution models. The ages of 35 hosts are found to be between 0.4 and 4.4\,Gyr, which broadly agrees with the ages given in existing literature. The orbital evolution of 55 planetary systems is simulated, with regards to the competing effects of stellar mass loss and tidal interactions with the host. It is found that the planets are migrating outwards in all but the one case of HAT-P-32b. The changes in period would, however, be unobservable, with dP/dt ∼ 10-7\,s\,yr-1 in most cases. It is expected that all the planets investigated will at some point be engulfed by the host star. Those on the shortest orbits (a < 0.07\,AU) are engulfed on the sub-giant branch, while planets with wider orbits are engulfed closer to the RGB tip. The angular momentum transferred to the convective envelope, in both cases, does not provide sufficient spin-up for this to be detected in engulfed systems. Advisors/Committee Members: BATTYE, RICHARD RA, Mcdonald, Iain, Battye, Richard.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Harjani, S. (2019). On the ages and evolution of exoplanetary systems. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:318008

Chicago Manual of Style (16th Edition):

Harjani, Suheil. “On the ages and evolution of exoplanetary systems.” 2019. Doctoral Dissertation, University of Manchester. Accessed February 22, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:318008.

MLA Handbook (7th Edition):

Harjani, Suheil. “On the ages and evolution of exoplanetary systems.” 2019. Web. 22 Feb 2019.

Vancouver:

Harjani S. On the ages and evolution of exoplanetary systems. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2019 Feb 22]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:318008.

Council of Science Editors:

Harjani S. On the ages and evolution of exoplanetary systems. [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:318008

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