dc.contributor.author | Seager, Sara | |
dc.contributor.author | Demory, Brice-Olivier | |
dc.contributor.author | Winn, Joshua Nathan | |
dc.date.accessioned | 2012-08-22T19:01:48Z | |
dc.date.available | 2012-08-22T19:01:48Z | |
dc.date.issued | 2011-11 | |
dc.identifier.issn | 0067-0049 | |
dc.identifier.issn | 1538-4365 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/72326 | |
dc.description.abstract | We report the detection of three transiting planets around a Sun-like star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satellite, and were confirmed to arise from planets using a combination of large transit-timing variations (TTVs), radial velocity variations, Warm-Spitzer observations, and statistical analysis of false-positive probabilities. The Kepler-18 star has a mass of 0.97 M ⊙, a radius of 1.1 R ⊙, an effective temperature of 5345 K, and an iron abundance of [Fe/H] = +0.19. The planets have orbital periods of approximately 3.5, 7.6, and 14.9 days. The innermost planet "b" is a "super-Earth" with a mass of 6.9 ± 3.4 M ⊕, a radius of 2.00 ± 0.10 R ⊕, and a mean density of 4.9 ± 2.4 g cm[superscript 3]. The two outer planets "c" and "d" are both low-density Neptune-mass planets. Kepler-18c has a mass of 17.3 ± 1.9 M ⊕, a radius of 5.49 ± 0.26 R ⊕, and a mean density of 0.59 ± 0.07 g cm[superscript 3], while Kepler-18d has a mass of 16.4 ± 1.4 M ⊕, a radius of 6.98 ± 0.33 R ⊕ and a mean density of 0.27 ± 0.03 g cm[superscript 3]. Kepler-18c and Kepler-18d have orbital periods near a 2:1 mean-motion resonance, leading to large and readily detected TTVs. | en_US |
dc.description.sponsorship | W. M. Keck Foundation | en_US |
dc.description.sponsorship | Jet Propulsion Laboratory (U.S.) | en_US |
dc.description.sponsorship | United States. National Aeronautics and Space Administration | en_US |
dc.language.iso | en_US | |
dc.publisher | Institute of Physics Publishing | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1088/0067-0049/197/1/7 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike 3.0 | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/3.0/ | en_US |
dc.source | Prof. Winn via Mat Willmott | en_US |
dc.title | Kepler-18b, c, and d: A system of three planets confirmed by transit timing variations, light curve validation, Warm-Spitzer photometry, and radial velocity measurements | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Cochran, William D. et al. “KEPLER-18b, c, AND d: A SYSTEM OF THREE PLANETS CONFIRMED BY TRANSIT TIMING VARIATIONS, LIGHT CURVE VALIDATION, WARM-SPITZER PHOTOMETRY, AND RADIAL VELOCITY MEASUREMENTS.” The Astrophysical Journal Supplement Series 197.1 (2011): 7. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.approver | Winn, Joshua Nathan | |
dc.contributor.mitauthor | Winn, Joshua Nathan | |
dc.contributor.mitauthor | Seager, Sara | |
dc.contributor.mitauthor | Demory, Brice-Olivier | |
dc.relation.journal | Astrophysical Journal. Supplement Series | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Cochran, William D.; Fabrycky, Daniel C.; Torres, Guillermo; Fressin, François; Désert, Jean-Michel; Ragozzine, Darin; Sasselov, Dimitar; Fortney, Jonathan J.; Rowe, Jason F.; Brugamyer, Erik J.; Bryson, Stephen T.; Carter, Joshua A.; Ciardi, David R.; Howell, Steve B.; Steffen, Jason H.; Borucki, William. J.; Koch, David G.; Winn, Joshua N.; Welsh, William F.; Uddin, Kamal; Tenenbaum, Peter; Still, M.; Seager, Sara; Quinn, Samuel N.; Mullally, F.; Miller, Neil; Marcy, Geoffrey W.; MacQueen, Phillip J.; Lucas, Phillip; Lissauer, Jack J.; Latham, David W.; Knutson, Heather; Kinemuchi, K.; Johnson, John A.; Jenkins, Jon M.; Isaacson, Howard; Howard, Andrew; Horch, Elliott; Holman, Matthew J.; Henze, Christopher E.; Haas, Michael R.; Gilliland, Ronald L.; Gautier III, Thomas N.; Ford, Eric B.; Fischer, Debra A.; Everett, Mark; Endl, Michael; Demory, Brice-Oliver; Deming, Drake; Charbonneau, David; Caldwell, Douglas; Buchhave, Lars; Brown, Timothy M.; Batalha, Natalie | en |
dc.identifier.orcid | https://orcid.org/0000-0002-6892-6948 | |
dc.identifier.orcid | https://orcid.org/0000-0002-4265-047X | |
mit.license | OPEN_ACCESS_POLICY | en_US |
mit.metadata.status | Complete | |