Planetesimal Accretion in Binary Systems: Could Planets Form Around Alpha Centauri B ?
arXiv:1001.2614 · doi:10.1088/0004-637X/708/2/1566
Abstract
Stellar perturbations affect planet-formation in binary systems. Recent studies show that the planet-formation stage of mutual accretion of km-sized planetesimals is most sensitive to binary effects. In this paper, the condition for planetesimal accretion is investigated around Alpha CenB, which is believed to be an ideal candidate for detection of an Earth-like planet in or near its habitable zone(0.5-0.9 AU). A simplified scaling method is developed to estimate the accretion timescale of the planetesimals embedded in a protoplanetary disk. Twenty-four cases with different binary inclinations(i_B=0, 0.1, 1.0, and 10 deg), gas densities(0.3,1,and 3 times of the Minimum Mass of Solar Nebula, MMSN hereafter), and with and without gas depletion, are simulated. We find: (1)...(2)...(3)...(4)...(see the paper for details). In other words, our results suggest that formation of Earth-like planets through accretion of km-sized planetesimals is possible in Alpha CenB, while formation of gaseous giant planets is not favorable.
16 pages 7 figures, ApJ 708, 1566
References in corpus (10)
- Properties of planets in binary systems. The role of binary separation
- Collisional processes and size distribution in spatially extended debris discs
- Relative velocities among accreting planetesimals in binary systems: the circumprimary case
- Terrestrial Planet Formation Surrounding Close Binary Stars
- Planetesimal and gas dynamics in binaries
- iVINE - Ionization in the parallel tree/SPH code VINE: First results on the observed age-spread around O-stars
- Planet formation in Alpha Centauri A revisited: not so accretion-friendly after all
- Formation and Detectability of Terrestrial Planets Around Alpha Centauri B
- Are Proxima and Alpha Centauri Gravitationally Bound?
- Planetesimal Accretion in Binary Systems: The Effects of Gas Dissipation
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- A Tale of Planet Formation: From Dust to Planets
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- Circumstellar Habitable Zones of Binary Star Systems in the Solar Neighborhood
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- Formation of S-type planets in close binaries: scattering induced tidal capture of circumbinary planets
- Long-Term Stability of Tightly Packed Multi-Planet Systems in Prograde, Coplanar, Circumstellar Orbits within the Centauri AB System
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- Circumbinary Planet Formation in the Kepler-16 System. II. A Toy Model for In-situ Planet Formation within a Debris Belt
- Planet Occurrence Rate Correlated to Stellar Dynamical History: Evidence from Kepler and Gaia
- The Mt John University Observatory Search For Earth-mass Planets In The Habitable Zone Of Alpha Centauri
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- Planetesimal Dynamics in the Presence of a Giant Planet II: Dependence on Planet Mass and Eccentricity
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