35th Meeting of the AAS Division on Dynamical Astronomy, April 2004
Session 5 Planets
Oral, Thursday, April 22, 2004, 9:30am-12:45pm,

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[5.03] Making other Earths: Simulations of Terrestrial Planet Formation and Water Delivery

S. N. Raymond, T. Quinn (University of Washington), J. I. Lunine (University of Arizona)

We present results from simulations of late stage planetary accretion, focusing on the delivery of volatiles (primarily water) to the terrestrial planets. Our simulations include both planetary ``embryos'' (defined as Moon to Mars sized protoplanets) and planetesimals, assuming that the embryos formed via oligarchic growth. We investigate volatile delivery as a function of Jupiter's mass, position and eccentricity, the position of the snow line, and the density (in solids) of the solar nebula.

In all simulations, we form 1-4 terrestrial planets inside 2 AU, which vary in mass and volatile content. In over 90% of the simulations we form a terrestrial planet between 0.8 and 1.5 AU, and in roughly one quarter of our simulations we form a potentially habitable planet between 0.9 and 1.1 AU. These planets range from dry worlds to ``water worlds'' with 100+ oceans of water (1 ocean = 1.5 x 1024 g), and vary in mass between 0.23 and 3.85 earth masses

We find that an eccentric Jupiter produces drier terrestrial planets with higher eccentricities than a circular one. In cases with Jupiter at 7 AU, we form what we call ``super embryos,'' 1-2 earth mass protoplanets which can serve as the accretion seeds for 2+ earth mass planets with large water contents.

If you would like more information about this abstract, please follow the link to http://www.astro.washington.edu/raymond/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: raymond@astro.washington.edu

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Bulletin of the American Astronomical Society, 36 #2
© 2004. The American Astronomical Soceity.