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(198) BCDEFGH9I JKL. ῐ. MN. ῎῍ῑῌ. !"#. ()*OPQ*. 1) 2) 3) 4) 5) 6). Kokubo E., Kominami J., Ida S., 2006, ApJ, in press Chambers J. E., 2001, Icarus 152, 205 Agnor C. B. Ward W. R., 2002, ApJ 567, 579 Kominami J. and Ida S., 2002, Icarus 157, 43 Kominami J. and Ida S., 2004, Icarus 167, 231 Dauphas N., Robert F., Marty, B., 2000, Icarus 148, 508. ῏. RS,T23S*UVWXYZA[\ (UCSC) ]^_àbXcd (CITA) ef * ghij(klkmnNo(p q. r[\ stuvw xyz{K|}~23. s8w 1* O92 3,223 MEXT-16077202 9 9. P ) k T23SZA[\. ij NASA (NAGS5-11779, NNG04G-191 G), JPL (1228184), NSF (AST-9987417) . . )* h901, 8 06999 6))9Nef*. 99 ¡. 5¢. Assemblage of Terrestrial Planets ! Makiko NAGASAWA National Astronomical Observatory of Japan, 2ῌ 21ῌ1 Osawa, Mitaka-shi, Tokyo 181ῌ8588, Japan Abstract : An outstanding issue concerning the conventional scenario for final terrestrial planet formation from the isolated protoplanets is that the giant impacts generally lead to modest eccentricity in the merger products. We investigate the e#ect of disk depletion and find that the eccentricity is excited through a sweeping secular resonance and is damped by a tidal interaction with the gas disk. With the separation between the excitation and damping processes, planets can attain small eccentricities analogous to our Solar System.. 265.

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