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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*

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Resource type
Journal Article
Authors/contributors
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*
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 5345K, 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 ± 2.4gcm3. 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 0.07gcm 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 ± 0.03gcm3. Kepler-18c and Kepler-18d have orbital periods near a 2:1 mean-motion resonance, leading to large and readily detected TTVs. © 2011. The American Astronomical Society. All rights reserved.
Publication
Astrophysical Journal Supplement Series
Date
2011-10-11, October 2011
Volume
197
Issue
1
Pages
7-null
Journal Abbr
Astrophys. J. Suppl. Ser.
DOI
10.1088/0067-0049/197/1/7
Citation Key
lens.org/162-742-011-549-996
URL
http://authors.library.caltech.edu/28445/; http://inspirehep.net/record/930482; https://core.ac.uk/display/9318200; http://cds.cern.ch/record/1387876; http://dspace.mit.edu/openaccess-disseminate/1721.1/72326; http://resolver.caltech.edu/CaltechAUTHORS:20111213-110331493; http://iopscience.iop.org/article/10.1088/0067-0049/197/1/7; https://repositories.lib.utexas.edu/handle/2152/42926; https://uhra.herts.ac.uk/handle/2299/7197; https://arxiv.org/abs/1110.0820; https://researchers.dellmed.utexas.edu/en/publications/kepler-18b-c-and-d-a-system-of-three-planets-confirmed-by-transit; http://adsabs.harvard.edu/abs/2011ApJS..197....7C; https://collaborate.princeton.edu/en/publications/kepler-18b-c-and-d-a-system-of-three-planets-confirmed-by-transit; http://eprints.usq.edu.au/32160/; https://ui.adsabs.harvard.edu/abs/2011ApJS..197....7C/abstract; https://arxiv.org/pdf/1110.0820; https://lens.org/162-742-011-549-996
ISSN
00670049 (ISSN)
Language
English
Extra
144 citations (Crossref) [2023-10-31] Citation Key Alias: pop00006 tex.type: [object Object]
Citation
Cochran, W. D., Fabrycky, D. C., Torres, G., Fressin, F., Désert, J.-M., Ragozzine, D., Sasselov, D., Fortney, J. J., Rowe, J. F., Brugamyer, E., Bryson, S. T., Carter, J. A., Ciardi, D. R., Howell, S. B., Steffen, J. H., Borucki, W. J., Koch, D. G., Winn, J. N., Welsh, W. F., … Batalha, N. M. (2011). 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*. Astrophysical Journal Supplement Series, 197(1), 7-null. https://doi.org/10.1088/0067-0049/197/1/7
Link to this record
https://libweb.southernct.edu/authors/bibliography/CAKCN68I