Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets via Precise Stellar Characterization
dc.contributor.author | Bedell, Megan | |
dc.contributor.author | Bean, Jacob | |
dc.contributor.author | Meléndez, J | |
dc.contributor.author | Mills, Sean M | |
dc.contributor.author | Fabrycky, Daniel C | |
dc.contributor.author | Freitas, Fabrıcio C. | |
dc.contributor.author | Ramírez, I | |
dc.contributor.author | Asplund, Martin | |
dc.contributor.author | Liu, Fan | |
dc.contributor.author | Yong, David | |
dc.date.accessioned | 2021-07-26T00:59:38Z | |
dc.date.issued | 2017 | |
dc.date.updated | 2020-11-23T10:43:51Z | |
dc.description.abstract | The six planets of the Kepler-11 system are the archetypal example of a population of surprisingly low-density transiting planets revealed by the Kepler mission. We have determined the fundamental parameters and chemical composition of the Kepler-11 host star to unprecedented precision using an extremely high-quality spectrum from Keck-HIRES (R ≃ 67,000, S/N per pixel at 600 nm). Contrary to previously published results, our spectroscopic constraints indicate that Kepler-11 is a young main-sequence solar twin. The revised stellar parameters and new analysis raise the densities of the Kepler-11 planets by between 20% and 95% per planet, making them more typical of the emerging class of "puffy" close-in exoplanets. We obtain photospheric abundances of 22 elements and find that Kepler-11 has an abundance pattern similar to that of the Sun with a slightly higher overall metallicity. We additionally analyze the Kepler light curves using a photodynamical model and discuss the tension between spectroscopic and transit/TTV-based estimates of stellar density. | en_AU |
dc.description.sponsorship | M.B. is supported by a National Science Foundation Graduate Research Fellowship under Grant No. DGE1144082. J.L.B. acknowledges support for this work from the NSF (grant number AST-1313119) and the Packard Foundation. J.M. thanks FAPESP (2012/24392-2). M.A., D.Y., and F.L. have been supported by the Australian Research Council (grants FL110100012, DP120100991, and FT140100554). | en_AU |
dc.format.mimetype | application/pdf | en_AU |
dc.identifier.issn | 0004-637X | en_AU |
dc.identifier.uri | http://hdl.handle.net/1885/241067 | |
dc.language.iso | en_AU | en_AU |
dc.provenance | https://v2.sherpa.ac.uk/id/publication/6401..."The Accepted Version can be archived in a Non-Commercial Institutional Repository" from SHERPA/RoMEO site (as at 3/08/2021). | |
dc.publisher | IOP Publishing | en_AU |
dc.relation | http://purl.org/au-research/grants/arc/FL110100012 | en_AU |
dc.relation | http://purl.org/au-research/grants/arc/DP120100991 | en_AU |
dc.relation | http://purl.org/au-research/grants/arc/FT140100554 | en_AU |
dc.rights | © 2017. The American Astronomical Society | en_AU |
dc.source | The Astrophysical Journal | en_AU |
dc.subject | planets and satellites: fundamental parameters | en_AU |
dc.subject | stars: abundances | en_AU |
dc.subject | stars: fundamental parameters | en_AU |
dc.subject | techniques: spectroscopic | en_AU |
dc.title | Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets via Precise Stellar Characterization | en_AU |
dc.type | Journal article | en_AU |
dcterms.accessRights | Open Access | |
local.bibliographicCitation.issue | 2 | en_AU |
local.bibliographicCitation.lastpage | 12 | en_AU |
local.bibliographicCitation.startpage | 1 | en_AU |
local.contributor.affiliation | Bedell, Megan, University of Chicago | en_AU |
local.contributor.affiliation | Bean, Jacob, University of Chicago | en_AU |
local.contributor.affiliation | Meléndez, J, Universidade de São Paulo | en_AU |
local.contributor.affiliation | Mills, Sean M, University of Chicago | en_AU |
local.contributor.affiliation | Fabrycky, Daniel C, University of Chicago | en_AU |
local.contributor.affiliation | Freitas, Fabrıcio C., Universidade de Sao Paulo | en_AU |
local.contributor.affiliation | Ramírez, I, University of Texas | en_AU |
local.contributor.affiliation | Asplund, Martin, College of Science, ANU | en_AU |
local.contributor.affiliation | Liu, Fan, College of Science, ANU | en_AU |
local.contributor.affiliation | Yong, David, College of Science, ANU | en_AU |
local.contributor.authoremail | u4042723@anu.edu.au | en_AU |
local.contributor.authoruid | Asplund, Martin, u4042723 | en_AU |
local.contributor.authoruid | Liu, Fan, u5217070 | en_AU |
local.contributor.authoruid | Yong, David, u3207952 | en_AU |
local.description.notes | Imported from ARIES | en_AU |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | en_AU |
local.identifier.ariespublication | a383154xPUB6987 | en_AU |
local.identifier.citationvolume | 839 | en_AU |
local.identifier.doi | 10.3847/1538-4357/aa6a1d | en_AU |
local.identifier.scopusID | 2-s2.0-85018957719 | |
local.identifier.thomsonID | 000399876200003 | |
local.identifier.uidSubmittedBy | a383154 | en_AU |
local.publisher.url | http://iopscience.iop.org/0004-637X | en_AU |
local.type.status | Accepted Version | en_AU |
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