A Maximum Radius for Habitable Planets

Alibert, Yann (2015). A Maximum Radius for Habitable Planets. Origins of Life and Evolution of Biospheres, 45(3), pp. 319-325. Springer 10.1007/s11084-015-9440-7

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We compute the maximum radius a planet can have in order to fulfill two constraints that are likely necessary conditions for habitability: 1- surface temperature and pressure compatible with the existence of liquid water, and 2- no ice layer at the bottom of a putative global ocean, that would prevent the operation of the geologic carbon cycle to operate. We demonstrate that, above a given radius, these two constraints cannot be met: in the Super-Earth mass range (1-12 M-earth), the overall maximum that a planet can have varies between 1.8 and 2.3 R-earth. This radius is reduced when considering planets with higher Fe/Si ratios, and taking into account irradiation effects on the structure of the gas envelope.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS)
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Alibert, Yann

Subjects:

500 Science > 520 Astronomy
500 Science > 530 Physics

ISSN:

0169-6149

Publisher:

Springer

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

17 Jun 2016 13:47

Last Modified:

25 Jun 2018 11:15

Publisher DOI:

10.1007/s11084-015-9440-7

Web of Science ID:

000358366700004

Uncontrolled Keywords:

Planet structure, Habitability, Planet composition

BORIS DOI:

10.7892/boris.81953

URI:

https://boris.unibe.ch/id/eprint/81953

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