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dc.contributor.authorDésert, Jean-Michel
dc.contributor.authorKempton, Eliza Miller-Ricci
dc.contributor.authorBerta, Zachory K.
dc.contributor.authorCharbonneau, David
dc.contributor.authorIrwin, Jonathan
dc.contributor.authorFortney, Jonathan
dc.contributor.authorBurke, Christopher J.
dc.contributor.authorNutzman, Philip
dc.date.accessioned2019-09-26T15:01:27Z
dc.date.issued2011
dc.identifier.citationDésert, Jean-Michel, Eliza Miller-Ricci Kempton, Zachory K. Berta, David Charbonneau, Jonathan Irwin, Jonathan Fortney, Christopher J. Burke, and Philip Nutzman. 2011. “OBSERVATIONAL EVIDENCE FOR A METAL-RICH ATMOSPHERE ON THE SUPER-EARTH GJ1214b.” The Astrophysical Journal 731 (2): L40. https://doi.org/10.1088/2041-8205/731/2/l40.
dc.identifier.issn2041-8205
dc.identifier.issn2041-8213
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41412188*
dc.description.abstractWe report observations of two consecutive transits of the warm super-Earth exoplanet GJ 1214b at 3.6 and 4.5 mu m with the Infrared Array Camera instrument on board the Spitzer Space Telescope. The two transit light curves allow for the determination of the transit parameters for this system. We find these parameters to be consistent with the previously determined values and no evidence for transit timing variations. The main investigation consists of measuring the transit depths in each bandpass to constrain the planet's transmission spectrum. Fixing the system scale and impact parameters, we measure R-p/R-star = 0.1176(-0.0009)(+0.0008) and 0.1163(-0.0008)(+0.0010) at 3.6 and 4.5 mu m, respectively. Combining these data with the previously reported MEarth Observatory measurements in the red optical allows us to rule out a cloud-free, solar composition (i.e., hydrogen-dominated) atmosphere at 4.5 sigma confidence. This independently confirms a recent finding that was based on a measurement of the planet's transmission spectrum using the Very Large Telescope (VLT). The Spitzer, MEarth, and VLT observations together yield a remarkably flat transmission spectrum over the large wavelength domain spanned by the data. Consequently, cloud-free atmospheric models require more than 30% metals (assumed to be in the form of H2O) by volume to be consistent with all the observations.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleObservational Evidence for a Metal-rich Atmosphere on the Super-earth Gj1214b
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalAstrophysical Journal Letters
dash.depositing.authorCharbonneau, David::a0e3ca75d3fb8511f2f554ed69428108::600
dc.date.available2019-09-26T15:01:27Z
dash.workflow.comments1Science Serial ID 58655
dc.identifier.doi10.1088/2041-8205/731/2/L40
dash.source.volume731;2
dash.source.pageL40


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