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Title: Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities

Abstract

In the Solar system the planets' compositions vary with orbital distance, with rocky planets in close orbits and lower-density gas giants in wider orbits. The detection of close-in giant planets around other stars was the first clue that this pattern is not universal, and that planets' orbits can change substantially after their formation. Here we report another violation of the orbit-composition pattern: two planets orbiting the same star with orbital distances differing by only 10%, and densities differing by a factor of 8. One planet is likely a rocky `super-Earth', whereas the other is more akin to Neptune. These planets are thirty times more closely spaced--and have a larger density contrast--than any adjacent pair of planets in the Solar system.

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1423274
Report Number(s):
arXiv:1206.4718; FERMILAB-PUB-12-400-AE
Journal ID: ISSN 0036-8075; 1119014
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 337; Journal Issue: 6094; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Carter, J. A., Agol, E., Chaplin, W. J., Basu, S., Bedding, T. R., Buchhave, L. A., Christensen-Dalsgaard, J., Deck, K. M., Elsworth, Y., Fabrycky, D. C., Ford, E. B., Fortney, J. J., Hale, S. J., Handberg, R., Hekker, S., Holman, M. J., Huber, D., Karoff, C., Kawaler, S. D., Kjeldsen, H., Lissauer, J. J., Lopez, E. D., Lund, M. N., Lundkvist, M., Metcalfe, T. S., Miglio, A., Rogers, L. A., Stello, D., Borucki, W. J., Bryson, S., Christiansen, J. L., Cochran, W. D., Geary, J. C., Gilliland, R. L., Haas, M. R., Hall, J., Howard, A. W., Jenkins, J. M., Klaus, T., Koch, D. G., Latham, D. W., MacQueen, P. J., Sasselov, D., Steffen, J. H., Twicken, J. D., and Winn, J. N. Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities. United States: N. p., 2012. Web. doi:10.1126/science.1223269.
Carter, J. A., Agol, E., Chaplin, W. J., Basu, S., Bedding, T. R., Buchhave, L. A., Christensen-Dalsgaard, J., Deck, K. M., Elsworth, Y., Fabrycky, D. C., Ford, E. B., Fortney, J. J., Hale, S. J., Handberg, R., Hekker, S., Holman, M. J., Huber, D., Karoff, C., Kawaler, S. D., Kjeldsen, H., Lissauer, J. J., Lopez, E. D., Lund, M. N., Lundkvist, M., Metcalfe, T. S., Miglio, A., Rogers, L. A., Stello, D., Borucki, W. J., Bryson, S., Christiansen, J. L., Cochran, W. D., Geary, J. C., Gilliland, R. L., Haas, M. R., Hall, J., Howard, A. W., Jenkins, J. M., Klaus, T., Koch, D. G., Latham, D. W., MacQueen, P. J., Sasselov, D., Steffen, J. H., Twicken, J. D., & Winn, J. N. Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities. United States. doi:10.1126/science.1223269.
Carter, J. A., Agol, E., Chaplin, W. J., Basu, S., Bedding, T. R., Buchhave, L. A., Christensen-Dalsgaard, J., Deck, K. M., Elsworth, Y., Fabrycky, D. C., Ford, E. B., Fortney, J. J., Hale, S. J., Handberg, R., Hekker, S., Holman, M. J., Huber, D., Karoff, C., Kawaler, S. D., Kjeldsen, H., Lissauer, J. J., Lopez, E. D., Lund, M. N., Lundkvist, M., Metcalfe, T. S., Miglio, A., Rogers, L. A., Stello, D., Borucki, W. J., Bryson, S., Christiansen, J. L., Cochran, W. D., Geary, J. C., Gilliland, R. L., Haas, M. R., Hall, J., Howard, A. W., Jenkins, J. M., Klaus, T., Koch, D. G., Latham, D. W., MacQueen, P. J., Sasselov, D., Steffen, J. H., Twicken, J. D., and Winn, J. N. Thu . "Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities". United States. doi:10.1126/science.1223269. https://www.osti.gov/servlets/purl/1423274.
@article{osti_1423274,
title = {Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities},
author = {Carter, J. A. and Agol, E. and Chaplin, W. J. and Basu, S. and Bedding, T. R. and Buchhave, L. A. and Christensen-Dalsgaard, J. and Deck, K. M. and Elsworth, Y. and Fabrycky, D. C. and Ford, E. B. and Fortney, J. J. and Hale, S. J. and Handberg, R. and Hekker, S. and Holman, M. J. and Huber, D. and Karoff, C. and Kawaler, S. D. and Kjeldsen, H. and Lissauer, J. J. and Lopez, E. D. and Lund, M. N. and Lundkvist, M. and Metcalfe, T. S. and Miglio, A. and Rogers, L. A. and Stello, D. and Borucki, W. J. and Bryson, S. and Christiansen, J. L. and Cochran, W. D. and Geary, J. C. and Gilliland, R. L. and Haas, M. R. and Hall, J. and Howard, A. W. and Jenkins, J. M. and Klaus, T. and Koch, D. G. and Latham, D. W. and MacQueen, P. J. and Sasselov, D. and Steffen, J. H. and Twicken, J. D. and Winn, J. N.},
abstractNote = {In the Solar system the planets' compositions vary with orbital distance, with rocky planets in close orbits and lower-density gas giants in wider orbits. The detection of close-in giant planets around other stars was the first clue that this pattern is not universal, and that planets' orbits can change substantially after their formation. Here we report another violation of the orbit-composition pattern: two planets orbiting the same star with orbital distances differing by only 10%, and densities differing by a factor of 8. One planet is likely a rocky `super-Earth', whereas the other is more akin to Neptune. These planets are thirty times more closely spaced--and have a larger density contrast--than any adjacent pair of planets in the Solar system.},
doi = {10.1126/science.1223269},
journal = {Science},
issn = {0036-8075},
number = 6094,
volume = 337,
place = {United States},
year = {2012},
month = {6}
}

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