Planetary Dynamics and Habitable Planet Formation in Binary Star Systems

Haghighipour, Nader; Dvořák, R.; Pilat-Lohinger, Elke

doi:10.1007/978-90-481-8687-7_11

Cited by 23 publications

(16 citation statements)

References 123 publications

(237 reference statements)

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“…The stage for which the influence of a companion is probably best understood is the final step of planetary accretion, leading from Lunar-sized embryos to fully formed planets. Several studies have shown that the regions where embryo accretion can proceed roughly correspond to those for orbital stability (Barbieri et al, 2002;Quintana et al, 2002Quintana et al, , 2007Haghighipour & Raymond , 2007;Guedes et al, 2008;Haghighipour et al, 2010). This is a further reassuring result for all known exoplanets-in-binaries.…”

Section: Late Stagesmentioning

confidence: 55%

Planet Formation in Binaries

Thébault

Haghighipour

2015

Planetary Exploration and Science: Recent Results and Advances

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Spurred by the discovery of more than 60 exoplanets in multiple systems, binaries have become in recent years one of the main topics in planet formation research. Numerous studies have investigated to what extent the presence of a stellar companion can affect the planet formation process. Such studies have implications that can reach beyond the sole context of binaries, as they allow to test certain aspects of the planet formation scenario by submitting them to extreme environments. We review here the current understanding on this complex problem. We show in particular how each of the different stages of the planet-formation process is affected differently by binary perturbations. We focus especially on the intermediate stage of kilometre-sized planetesimal accretion, which has proven to be the most sensitive to binarity and for which the presence of some exoplanets observed in tight binaries is difficult to explain by in-situ formation following the "standard" planet-formation scenario. Some tentative solutions to this apparent paradox are presented. The last part of our review presents a thorough description of the problem of planet habitability, for which the binary environment creates a complex situation because of the presence of two irradiation sources of varying distance.

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Section: Late Stagesmentioning

confidence: 55%

Planet Formation in Binaries

Thébault

Haghighipour

2015

Planetary Exploration and Science: Recent Results and Advances

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“…To achieve its goals, Kepler relies on its exquisite photometric precision, its ability to simultaneously observe roughly 160,000 stars, and its long-duration and near-continuous time-series measurements ). This triad of unique capabilities makes Kepler ideally suited for exoplanet discovery and characterization, including planets in binary star systems (see Haghighipour 2010 for an in-depth discussions of planets in binary star systems).…”

Section: Introductionmentioning

confidence: 99%

THE NEPTUNE-SIZED CIRCUMBINARY PLANET KEPLER-38b

Orosz

Welsh

Carter

et al. 2012

ApJ

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228

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We discuss the discovery and characterization of the circumbinary planet Kepler-38b. The stellar binary is single-lined, with a period of 18.8 days, and consists of a moderately evolved main-sequence star (M A = 0.949 ± 0.059 M and R A = 1.757 ± 0.034 R ) paired with a low-mass star (M B = 0.249 ± 0.010 M and R B = 0.2724 ± 0.0053 R ) in a mildly eccentric (e = 0.103) orbit. A total of eight transits due to a circumbinary planet crossing the primary star were identified in the Kepler light curve (using Kepler Quarters 1-11), from which a planetary period of 105.595 ± 0.053 days can be established. A photometric dynamical model fit to the radial velocity curve and Kepler light curve yields a planetary radius of 4.35 ± 0.11 R ⊕ , or equivalently 1.12 ± 0.03 R Nep . Since the planet is not sufficiently massive to observably alter the orbit of the binary from Keplerian motion, we can only place an upper limit on the mass of the planet of 122 M ⊕ (7.11 M Nep or equivalently 0.384 M Jup ) at 95% confidence. This upper limit should decrease as more Kepler data become available.

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“…Several studies have shown that the regions where embryo accretion can proceed roughly correspond to those for orbital stability (Barbieri et al 2002;Quintana et al 2002Quintana et al , 2007Haghighipour and Raymond 2007;Guedes et al 2008;Haghighipour et al 2010). Several studies have shown that the regions where embryo accretion can proceed roughly correspond to those for orbital stability (Barbieri et al 2002;Quintana et al 2002Quintana et al , 2007Haghighipour and Raymond 2007;Guedes et al 2008;Haghighipour et al 2010).…”

Section: Late Stagesmentioning

confidence: 98%

Planetary Exploration and Science: Recent Results and Advances

Jin

Haghighipour

2015

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Planetary Dynamics and Habitable Planet Formation in Binary Star Systems

Cited by 23 publications

References 123 publications

Planet Formation in Binaries

Planet Formation in Binaries

THE NEPTUNE-SIZED CIRCUMBINARY PLANET KEPLER-38b

Planetary Exploration and Science: Recent Results and Advances

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