Effects of a Rogue Star on Earth's Climate
2020-08
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Effects of a Rogue Star on Earth's Climate
Authors
Published Date
2020-08
Publisher
Type
Thesis or Dissertation
Abstract
The details of the way in which the Earth orbits the Sun can have profound effects on Earth’s climate. Elements such as the Earth’s tilt or how tight the orbit is can affect temperature distribution or glacial formation. One event that could lead to such changes is if a star passes near our solar system close enough to disturb Earth’s orbit. Over the Earth's 4.5 billion year history, many stars could have approached the Solar System. Disturbances that are forced due to such an event could have effects on the orbit of planets in the Solar System. Even small changes to the orbits of the planets can have large effects on the climate a planet experiences as they could disrupt the Milankovitch cycles. These effects would be visible in the Earth's sediment core data, which can be used to help model the Earth's position as it orbits the Sun. This work focuses on modeling the effects of a star passing within the Solar System on the eccentricity, semi-major axis, and argument of the periapsis. The changes to the Earth's climate due to the changes on those orbital elements are also considered. Here the focus is on what the system would look like if the star were to pass within Kuiper Belt and the Oort Cloud. Passage within the Kuiper Belt has can change the equilibrium temperature of the Earth up to $2^\circ$ C without even taking into consideration the interactions of the planets with each other on the climate. The position of a planet as the star passes has an effect on the system, giving different results for different initial conditions. This position is seen to lead to dramatic differences between the orbital elements for various solutions.
Description
University of Minnesota Ph.D. dissertation. 2020. Major: Mathematics. Advisor: Richard McGehee. 1 computer file (PDF); xiii, 98 pages.
Related to
Replaces
License
Collections
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Chandramouli, Harini. (2020). Effects of a Rogue Star on Earth's Climate. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/216900.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.