abs: Survival of Terrestrial Planets in the Habitable Zone in the Presence of Jovian Migration

From: Amara Graps (amara@amara.com)
Date: Thu Jul 31 2003 - 02:33:49 MDT

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    http://xxx.lanl.gov/abs/astro-ph/0307512

    Astrophysics, abstract
    astro-ph/0307512

    From: Avi Mandell <mandell@astro.psu.edu>
    Date: Tue, 29 Jul 2003 22:27:12 GMT (93kb)

    Survival of Terrestrial Planets in the Habitable Zone in the Presence of
    Jovian Migration

    Authors: Avi M. Mandell, Steinn Sigurdsson (Penn State University)
    Comments: 7 pages, 3 figures, submitted to ApJL

          The presence of ``Hot Jupiters'', Jovian mass planets with very
          short orbital periods orbiting nearby main sequence stars, has
          been proposed to be primarily due to the orbital migration of
          planets formed in orbits initially much further from the parent
          star. The migration of giant planets would have profound effects
          on the evolution of inner terrestrial planets in these systems,
          and previous analyses have assumed that no terrestrial planets
          survive after migration has occurred. We present numerical
          simulations showing that a significant fraction of terrestrial
          planets could survive the migration process, eventually returning
          to circular orbits relatively close to their original positions. A
          fraction of the final orbits are in the Habitable Zone, suggesting
          that planetary systems with close-in giant planets are viable
          targets for searches for Earth-like habitable planets around other
          stars.

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    -- 
    Amara Graps, PhD
    Istituto di Fisica dello Spazio Interplanetario (IFSI)
    Istituto Nazionale di Astrofisica (INAF),
    Adjunct Assistant Professor Astronomy, AUR,
    Roma, ITALIA     Amara.Graps@ifsi.rm.cnr.it
    


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