On the Tidal Inflation of Short‐Period Extrasolar Planets
Open accessAbstract
We examine the consequences of tidal interaction between eccentric short-period extrasolar planets and their host stars and of secular perturbations between planets in a given system. If the planet is within 0.05 AU of the star, the dissipation of the stellar tidal disturbance within the planet provides a significant energy source, which causes the planet to inflate as it adjusts to a thermal equilibrium. We determine the planetary size as a function of the tidal dissipation rate with or without the presence of a core. Inflation intensifies the star-planet tidal interaction and accelerates the pace of the planet's spin synchronization and orbital circularization. We apply our results to three systems with short-period planets: HD 209458, Ups And, and Tau Boo.
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Hot Jupiters' inflated radii require an additional heat source, such as tidal heating during high eccentricity migration, thermal tides caused by stellar irradiation, or deposition of stellar irradiation energy into the interior.
“Hot Jupiters' inflated radii require an additional heat source, such as tidal heating during high eccentricity migration (e.g., Bodenheimer, Lin & Mardling 2001), thermal tides caused by stellar irradiation (e.g., Arras & Socrates 2010, Socrates 2013), or deposition of stellar irradiation energy into the interior (e.g., Guillot & Showman 2002, Batygin & Stevenson 2010, Youdin &”
From Origins of Hot Jupiters (2018) · cites this paper as Bodenheimer, Lin & Mardling 2001
The Summary and Discussion says HD 209458’s inflated radius needs an additional energy source and identifies tidal dissipation from an eccentric orbit as one possibility. Section 3.2 adds that the planet could have experienced intense internal dissipation during migration, but the cited passages do not establish that this was specifically high-eccentricity migration. The other proposed heat sources in the citing sentence are attributed to other papers, not this one. (LLM, conf=0.82)
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Cites
Detection of Planetary Transits Across a Sun-like Star
Charbonneau, D., Brown, T. M., Latham, D. W., & Mayor, M. (2000) · The Astrophysical Journal · doi:10.1086/312457 · Cited by 1,415 · see citing works
Giant Planet Formation by Gravitational Instability
Boss, A. P. (1997) · Science · doi:10.1126/science.276.5320.1836 · Cited by 1,124 · cited 1× · see citing works
“The second relies on gravitational instability in a gaseous protostellar disk (Kuiper 1951 ; Cameron 1978 ; Boss 1997), which produces a subcondensation with composition close to that of the central star with little, if any, solid core (Stevenson 1982 ; see also Boss 1998).”
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Research works printed but not linked: 4
- Houben, H., & Gierasch, P. J. 1977, in Proc. Symp. on Planetary Atmo- spheres, R. Soc. Canada, 79
- Kuiper, G. P. 1951, in Astrophysics, ed. J. Hynek (New York : McGraw Hill), 357
- Marcy, G. W., Cochran, W. D., & Mayor, M. 2000, in Protostars and Planets IV, ed. V. Mannings, A. P. Boss, & S. Russell (Tucson : Univ. of Arizona Press), 1285
- Wuchterl, G., Guillot, T., & Lissauer, J. J. 2000, in Protostars and Planets IV, ed. V. Mannings, A. P. Boss, & S. Russell (Tucson : Univ. of Arizona Press), 1081
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Dawson, R. I., & Johnson, J. A. (2018) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081817-051853 · Cited by 622 · see citing works
The interiors of giant planets: Models and outstanding questions.
Guillot, T. (2005) · Annual Review of Earth and Planetary Sciences · doi:10.1146/annurev.earth.32.101802.120325 · Cited by 524 · see citing works
WASP-17b: AN ULTRA-LOW DENSITY PLANET IN A PROBABLE RETROGRADE ORBIT
Anderson, D. R., Hellier, C., Gillon, M., Triaud, A. H. M. J., Smalley, B., Hebb, L., Cameron, A. C., Maxted, P. F. L., Queloz, D., West, R. G., et al. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/709/1/159 · Cited by 208 · see citing works
- Authors
- Bodenheimer, P., Lin, D. N. C., & Mardling, R. A.
- Affiliations
- University of California, Santa Cruz (US)
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2001-02-10
- Volume
- 548
- Issue
- 1
- Pages
- 466-472
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2039556889
- Cited by
- 415
- References
- 2
- Citations by year
- 2026: 10 · 2025: 20 · 2024: 14 · 2023: 10 · 2022: 18 · 2021: 10 · 2020: 15 · 2019: 10 · 2018: 31 · 2017: 11 · 2016: 17 · 2015: 13 · 2014: 16 · 2013: 16 · 2012: 32
- FWCI
- 6.11
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Astrophysical Journal (publishedVersion)
- Funders
- National Science Foundation (9618548, 9714275)
- National Aeronautics and Space Administration
- Ames Research Center
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › History and Developments in Astronomy
- Keywords
- short-period exoplanets, tidal interactions, eccentric orbits, tidal dissipation, planetary cores, orbital circularization, secular perturbations, HD 209458, Upsilon Andromedae, tau Bootis
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