{"id":40,"date":"2009-05-19T13:21:26","date_gmt":"2009-05-19T04:21:26","guid":{"rendered":"http:\/\/guas-astronomy.jp\/weblog2\/?p=40"},"modified":"2009-05-19T13:21:26","modified_gmt":"2009-05-19T04:21:26","slug":"_n","status":"publish","type":"post","link":"https:\/\/guas-astronomy.jp\/weblog\/?p=40","title":{"rendered":"\u5927\u7c92\u5b50\u6570\u3092\u6271\u3048\u308b\u60d1\u661f\u5f62\u6210\u904e\u7a0b\u5411\u3051\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9 N \u4f53\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306e\u958b\u767a"},"content":{"rendered":"<p>\u3010\u65e5\u6642\u30115\u670820\u65e5(\u6c34)\u300010:30\uff5e12:00<br \/>\n\u3010\u5834\u6240\u3011\u56fd\u7acb\u5929\u6587\u53f0\u30fb\u4e09\u9df9 \u5317\u78141\u968e\u8b1b\u7fa9\u5ba4<br \/>\n\u3010\u30bf\u30a4\u30c8\u30eb\u3011\u5927\u7c92\u5b50\u6570\u3092\u6271\u3048\u308b\u60d1\u661f\u5f62\u6210\u904e\u7a0b\u5411\u3051\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9 N \u4f53\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306e\u958b\u767a<br \/>\n\u3010\u767a\u8868\u8005(\u656c\u79f0\u7565)\u3011\u62bc\u91ce\u3000\u7fd4\u4e00\uff08\u7dcf\u7814\u5927 D2 \u30fb\u4e09\u9df9\u3001\u6307\u5c0e\u6559\u54e1\u2003\u7267\u91ce\u6df3\u4e00\u90ce\uff09<br \/>\n\u60d1\u661f\u5f62\u6210\u306e\u6a19\u6e96\u30e2\u30c7\u30eb\u306f Safronov (1969) \u3084 Hayashi et al. (1985) \u3067\u63d0\u6848\u3055\u308c\u305f\u30e2\u30c7\u30eb\u304c\u57fa\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u305d\u306e\u5f62\u6210\u904e\u7a0b\u306e\u4e2d\u306e\u5fae\u60d1\u661f\u885d\u7a81\u6bb5\u968e\u3067\u306f\u3001\u5fae\u60d1\u661f\u540c\u58eb\u304c\u885d\u7a81\u5408\u4f53\u3092\u7e70\u308a\u8fd4\u3059\u3053\u3068\u3067\u539f\u59cb\u60d1\u661f\u306b\u9032\u5316\u3057\u305f\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u308b\u3002\u3053\u306e\u904e\u7a0b\u306e\u7814\u7a76\u306b\u306f N \u4f53\u8a08\u7b97\u304c\u7528\u3044\u3089\u308c\u3066\u304a\u308a\u3001\u66b4\u8d70\u6210\u9577\u3084\u5be1\u5360\u6210\u9577 (Kokubo &#038; Ida 1998, 2000) \u3068\u3044\u3063\u305f\u5f62\u6210\u904e\u7a0b\u304c\u89e3\u660e\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u3057\u304b\u3057\u3001\u5148\u884c\u7814\u7a76\u3067\u306f\u7c92\u5b50\u6570\u304c\u6570\u4e07\u4f53\u30011 \u7c92\u5b50\u5f53\u305f\u308a\u306e\u8cea\u91cf\u304c 10^23 g \u7a0b\u5ea6\u306e\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u884c\u308f\u308c\u3066\u304a\u308a\u3053\u308c\u3088\u308a\u8efd\u3044\u5fae\u60d1\u661f\u306e\u632f\u308b\u821e\u3044\u306b\u3064\u3044\u3066\u306f\u826f\u304f\u5206\u304b\u3063\u3066\u3044\u306a\u3044\u3002\u307e\u305f\u3001\u6271\u3048\u308b\u7c92\u5b50\u6570\u306b\u5236\u9650\u304c\u3042\u308b\u305f\u3081\u3001\u6b86\u3069\u5168\u3066\u306eN \u4f53\u8a08\u7b97\u306f perfect accretion\u3092\u4eee\u5b9a\u3057\u3066\u884c\u308f\u308c\u3066\u304d\u305f\u3002<br \/>\n\u3053\u306e\u4eee\u5b9a\u304c\u3001\u7279\u306b\u60d1\u661f\u6210\u9577\u306e\u5f8c\u671f\u306e\u904e\u7a0b\u3067\u9069\u5207\u304b\u3069\u3046\u304b\u306f\u660e\u3089\u304b\u3067\u306f\u306a\u3044\u3002<br \/>\n\u305d\u3053\u3067\u672c\u7814\u7a76\u3067\u306f\u7c92\u5b50\u6570\u3092\u5897\u3084\u3057\u9ad8\u3044\u8cea\u91cf\u5206\u89e3\u80fd\u3067\u306e\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u306a\u3048\u308b\u8a08\u7b97\u30b3\u30fc\u30c9\u3092\u958b\u767a\u3057\u3001\u3053\u308c\u3089\u306e\u672a\u89e3\u6c7a\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u3053\u3068\u3092\u76ee\u6a19\u3068\u3059\u308b\u3002<br \/>\nN \u4f53\u8a08\u7b97\u306f\u7c92\u5b50\u6570\u306e 2 \u4e57\u3067\u8a08\u7b97\u91cf\u304c\u5897\u52a0\u3059\u308b\u3002\u307e\u305f\u60d1\u661f\u5f62\u6210\u306e\u5834\u5408\u3001\u5fae\u60d1\u661f\u306e\u516c\u8ee2\u5468\u671f\u306b\u6bd4\u3079\u5f62\u6210\u6642\u9593\u304c\u306f\u308b\u304b\u306b\u9577\u3044\u305f\u3081\u975e\u5e38\u306b\u9577\u6642\u9593\u306e\u7a4d\u5206\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002<br \/>\n\u4ee5\u4e0a\u306e\u7406\u7531\u306b\u3088\u308a\u60d1\u661f\u5f62\u6210\u904e\u7a0b\u5411\u3051\u306e\u9ad8\u901f\u306b\u8a08\u7b97\u3067\u304d\u308b\u30b3\u30fc\u30c9\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002<br \/>\n\u4eca\u56de\u958b\u767a\u3057\u305f\u30b3\u30fc\u30c9\u3067\u306f\u5927\u7c92\u5b50\u6570\u3092\u6271\u3046\u305f\u3081\u306b\u30c4\u30ea\u30fc\u6cd5(Barnes &#038; Hut 1986)\u3092\u7528\u3044\u3066N\u4f53\u8a08\u7b97\u306e\u8a08\u7b97\u91cf\u3092O(N log N)\u306b\u6e1b\u3089\u3057\u3066\u3044\u308b\u3002<br \/>\n\u307e\u305f\u60d1\u661f\u5f62\u6210\u306e\u8a08\u7b97\u306f\u885d\u7a81\u7cfb\u306e\u305f\u3081\u8fd1\u63a5\u906d\u9047\u3092\u7cbe\u5ea6\u826f\u304f\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br \/>\n\u305d\u3053\u3067\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u6cd5 (Chambers 1999) \u3092\u7528\u3044\u3066\u8fd1\u63a5\u906d\u9047\u3057\u305f\u7c92\u5b50\u9593\u91cd\u529b\u3092\u53d6\u308a\u51fa\u3057\u3001\u7d30\u304b\u3044\u6642\u9593\u523b\u307f\u3067\u7a4d\u5206\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u7cbe\u5ea6\u3092\u4fdd\u3061\u306a\u304c\u3089\u9ad8\u901f\u306b\u8a08\u7b97\u3059\u308b\u3002<br \/>\n\u672c\u767a\u8868\u3067\u306f\u4eca\u56de\u958b\u767a\u3057\u305f\u30b3\u30fc\u30c9\u306e\u30c6\u30b9\u30c8\u8a08\u7b97\u306e\u7d50\u679c\u3068\u4eca\u5f8c\u306e\u5c55\u671b\u306b\u3064\u3044\u3066\u8ff0\u3079\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3010\u65e5\u6642\u30115\u670820\u65e5(\u6c34)\u300010:30\uff5e12:00 \u3010\u5834\u6240\u3011\u56fd\u7acb\u5929\u6587\u53f0\u30fb\u4e09\u9df9 \u5317\u78141\u968e\u8b1b\u7fa9\u5ba4 \u3010\u30bf\u30a4\u30c8\u30eb\u3011\u5927\u7c92\u5b50\u6570\u3092\u6271\u3048\u308b\u60d1\u661f\u5f62\u6210\u904e\u7a0b\u5411\u3051\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9 N \u4f53\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306e\u958b\u767a \u3010\u767a\u8868\u8005(\u656c\u79f0\u7565)\u3011\u62bc\u91ce\u3000\u7fd4\u4e00\uff08\u7dcf [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,5],"tags":[],"class_list":["post-40","post","type-post","status-publish","format-standard","hentry","category-6","category-5"],"_links":{"self":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/40","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=40"}],"version-history":[{"count":0,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/40\/revisions"}],"wp:attachment":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}