The DOI matches its Crossref record; 97 of the 97 references it cites were found in a registry or an index.
The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets
Open accessAbstract
Probing the connection between a star’s metallicity and the presence and properties of any associated planets offers an observational link between conditions during the epoch of planet formation and mature planetary systems. We explore this connection by analyzing the metallicities of Kepler target stars and the subset of stars found to host transiting planets. After correcting for survey incompleteness, we measure planet occurrence: the number of planets per 100 stars with a given metallicity M. Planet occurrence correlates with metallicity for some, but not all, planet sizes and orbital periods. For warm super-Earths having P = 10–100 days and = 1.0–1.7 , planet occurrence is nearly constant over metallicities spanning −0.4 to +0.4 dex. We find 20 warm super-Earths per 100 stars, regardless of metallicity. In contrast, the occurrence of warm sub-Neptunes ( = 1.7–4.0 ) doubles over that same metallicity interval, from 20 to 40 planets per 100 stars. We model the distribution of planets as , where β characterizes the strength of any metallicity correlation. This correlation steepens with decreasing orbital period and increasing planet size. For warm super-Earths β = , while for hot Jupiters β = . High metallicities in protoplanetary disks may increase the mass of the largest rocky cores or the speed at which they are assembled, enhancing the production of planets larger than 1.7 . The association between high metallicity and short-period planets may reflect disk density profiles that facilitate the inward migration of solids or higher rates of planet–planet scattering.
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Cites
Matplotlib: a 2D graphics environment
Hunter, J. D. (2007) · Computing in Science & Engineering · doi:10.1109/mcse.2007.55 · Cited by 39,249
Astropy: A community Python package for astronomy
The Astropy Collaboration, Robitaille, T. P., Tollerud, E. J., Greenfield, P., Droettboom, M., Bray, E., Aldcroft, T., Davis, M., Ginsburg, A., Price-Whelan, A. M., et al. (2013) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201322068 · Cited by 14,620
<tt>emcee</tt>: The MCMC Hammer
Foreman-Mackey, D., Hogg, D. W., Lang, D., & Goodman, J. (2013) · Publications of the Astronomical Society of the Pacific · doi:10.1086/670067 · Cited by 12,414
The NumPy Array: A Structure for Efficient Numerical Computation
van der Walt, S., Colbert, S. C., & Varoquaux, G. (2011) · Computing in Science & Engineering · doi:10.1109/mcse.2011.37 · Cited by 9,381
Transiting Exoplanet Survey Satellite
Ricker, G. R., Winn, J. N., Vanderspek, R., Latham, D. W., Bakos, G. Á., Bean, J. L., Berta-Thompson, Z. K., Brown, T. M., Buchhave, L., Butler, N. R., et al. (2014) · Journal of Astronomical Telescopes, Instruments, and Systems · doi:10.1117/1.jatis.1.1.014003 · Cited by 4,056
Self-citationFormation of the Giant Planets by Concurrent Accretion of Solids and Gas
Pollack, J. B., Hubickyj, O., Bodenheimer, P., Lissauer, J. J., Podolak, M., & Greenzweig, Y. (1996) · Icarus · doi:10.1006/icar.1996.0190 · Cited by 3,127
Ensemble samplers with affine invariance
Goodman, J., & Weare, J. (2010) · Communications in Applied Mathematics and Computational Science · doi:10.2140/camcos.2010.5.65 · Cited by 3,075
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)
Cui, X.-Q., Zhao, Y.-H., Chu, Y.-Q., Li, G.-P., Li, Q., Zhang, L.-P., Su, H.-J., Yao, Z.-Q., Wang, Y.-N., Xing, X.-Z., et al. (2012) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/12/9/003 · Cited by 1,720
LMFIT: Non-Linear Least-Square Minimization and Curve-Fitting for Python
Newville, M., Otten, R., Nelson, A., Stensitzki, T., Ingargiola, A., Allan, D., Fox, A., Carter, F., Michał, Osborn, R., et al. (2014) · Zenodo (CERN European Organization for Nuclear Research) · doi:10.5281/zenodo.598352 · Cited by 1,680
The Planet‐Metallicity Correlation
Fischer, D. A., & Valenti, J. (2005) · The Astrophysical Journal · doi:10.1086/428383 · Cited by 1,654
Cited by
Searching the Entirety of Kepler Data. II. Occurrence Rate Estimates for FGK Stars
Kunimoto, M., & Matthews, J. M. (2020) · The Astronomical Journal · doi:10.3847/1538-3881/ab88b0 · Cited by 139
Metadata
- Authors
- Petigura, E. A., Marcy, G. W., Winn, J. N., Weiss, L. M., Fulton, B. J., Howard, A. W., Sinukoff, E., Isaacson, H., Morton, T. D., & Johnson, J. A.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2018-01-29
- Volume
- 155
- Issue
- 2
- Pages
- 89
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W2774695731
- Cited by
- 363
- References
- 97
- FWCI
- 19.40
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Petigura, E. A., Marcy, G. W., Winn, J. N., Weiss, L. M., Fulton, B. J., Howard, A. W., Sinukoff, E., Isaacson, H., Morton, T. D., & Johnson, J. A. (2018). The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets. The Astronomical Journal. https://doi.org/10.3847/1538-3881/aaa54c
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