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Probabilistic Constraints on the Mass and Composition of Proxima b
| dc.contributor.author | Bixel, Alex | |
| dc.contributor.author | Apai, Dániel | |
| dc.date.accessioned | 2017-04-24T20:08:11Z | |
| dc.date.available | 2017-04-24T20:08:11Z | |
| dc.date.issued | 2017-02-21 | |
| dc.identifier.citation | Probabilistic Constraints on the Mass and Composition of Proxima b 2017, 836 (2):L31 The Astrophysical Journal Letters | en |
| dc.identifier.issn | 2041-8213 | |
| dc.identifier.doi | 10.3847/2041-8213/aa5f51 | |
| dc.identifier.uri | http://hdl.handle.net/10150/623234 | |
| dc.description.abstract | Recent studies regarding the habitability, observability, and possible orbital evolution of the indirectly detected exoplanet Proxima b have mostly assumed a planet with M similar to 1.3 M-circle plus, a rocky composition, and an Earth-like atmosphere or none at all. In order to assess these assumptions, we use previous studies of the radii, masses, and compositions of super-Earth exoplanets to probabilistically constrain the mass and radius of Proxima. b, assuming an isotropic inclination probability distribution. We find it is similar to 90% likely that the planet's density is consistent with a rocky composition; conversely, it is at least 10% likely that the planet has a significant amount of ice or an H/He envelope. If the planet does have a rocky composition, then we find expectation values and 95% confidence intervals of < M >(rocky) = 1.63(-0.72)(+1.66) M-circle plus for its mass and < R >(rocky) = 1.07(-0.31)(+0.38) R-circle plus for its radius. | |
| dc.description.sponsorship | NASA's Science Mission Directorate | en |
| dc.language.iso | en | en |
| dc.publisher | IOP PUBLISHING LTD | en |
| dc.relation.url | http://stacks.iop.org/2041-8205/836/i=2/a=L31?key=crossref.2a2b7c74330550df6f94c8a5751a0e37 | en |
| dc.rights | © 2017. The American Astronomical Society. All rights reserved. | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
| dc.subject | planets and satellites: composition | en |
| dc.subject | planets and satellites: individual ( Proxima Centauri b) | en |
| dc.subject | methods: numerical | en |
| dc.subject | methods: statistical | en |
| dc.title | Probabilistic Constraints on the Mass and Composition of Proxima b | en |
| dc.type | Article | en |
| dc.contributor.department | Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab | en |
| dc.identifier.journal | The Astrophysical Journal Letters | en |
| dc.description.collectioninformation | This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu. | en |
| dc.eprint.version | Final published version | en |
| refterms.dateFOA | 2018-06-18T10:06:09Z | |
| html.description.abstract | Recent studies regarding the habitability, observability, and possible orbital evolution of the indirectly detected exoplanet Proxima b have mostly assumed a planet with M similar to 1.3 M-circle plus, a rocky composition, and an Earth-like atmosphere or none at all. In order to assess these assumptions, we use previous studies of the radii, masses, and compositions of super-Earth exoplanets to probabilistically constrain the mass and radius of Proxima. b, assuming an isotropic inclination probability distribution. We find it is similar to 90% likely that the planet's density is consistent with a rocky composition; conversely, it is at least 10% likely that the planet has a significant amount of ice or an H/He envelope. If the planet does have a rocky composition, then we find expectation values and 95% confidence intervals of < M >(rocky) = 1.63(-0.72)(+1.66) M-circle plus for its mass and < R >(rocky) = 1.07(-0.31)(+0.38) R-circle plus for its radius. |
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