From midplane to planets : the chemical fingerprint of a disk

Leiden Repository

From midplane to planets : the chemical fingerprint of a disk

Type: Doctoral Thesis
Title: From midplane to planets : the chemical fingerprint of a disk
Author: Eistrup, C.
Issue Date: 2018-10-16
Keywords: Exoplanets
Astrochemistry
Chemical kinetics
C/O ratio
Comets
Planet formation
Abstract: This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres. Connecting the observed composition of exoplanets to their formation sites often involves comparing the observed planetary atmospheric carbon-to-oxygen (C/O) ratio to a disk midplane model with a fixed chemical composition. In this scenario chemistry during the planet formation era is not considered, and the C/O ratios of gas and ice in disk midplane are simply defined by volatile icelines in a midplane of fixed chemical composition. However, kinetic chemical evolution during the lifetime of the gaseous disk can change the relative abundances of volatile species, thus altering the C/O ratios of planetary building blocks. In my chemical evolution models I utilize a large network of gas-phase, grain-surface and gas-grain interaction reactions, thus providing a comprehensive treatment of chemistry. In my talk I will show how chemical evolution can modify disk miplane chemistry and how this affects the C/O ratio of giant planet-forming material. I will argue that midplane chemical evolution needs to be addressed when predicting the chemical makeup of planets and their atmospheres. And as an extra, I will propose that chemical evolution can help constrain the formation histories of comets.
Promotor: Supervisor: Dishoeck E.F. van Co-Supervisor: Walsh C.
Faculty: Faculty of Science
University: Leiden University
Uri: urn:isbn:9789402812022
Handle: http://hdl.handle.net/1887/66260
 

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application/pdf Chapter 1 7.804Mb View/Open
application/pdf Chapter 2 959.5Kb View/Open Full text at publisher site
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application/pdf Bibliography 124.4Kb View/Open
application/pdf Summary in English 939.6Kb View/Open
application/pdf Summary in Dutch 750.4Kb View/Open
application/pdf Summary in Danish 941.2Kb View/Open
application/pdf Publications_Curriculum Vitae_ Acknowledgements 298.9Kb View/Open
application/pdf Propositions 103.9Kb View/Open

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