Properties of the trans-neptunian belt: Statistics from the Canada-France-Hawaii Telescope Survey

被引:183
作者
Trujillo, CA
Jewitt, DC
Luu, JX
机构
[1] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
[2] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[3] Leiden Observ, NL-2300 RA Leiden, Netherlands
关键词
Kuiper belt; minor planets; asteroids; solar system : formation;
D O I
10.1086/321117
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the results of a wide-field survey designed to measure the size, inclination, and radial distributions of Kuiper Belt objects (KBOs). The survey found 86 KBOs in 73 deg(2) observed to limiting red magnitude of 23.7 using the Canada-France-Hawaii Telescope and the 12K x 8K CCD mosaic camera. For the first time, both ecliptic and off-ecliptic fields were examined to more accurately constrain the inclination distribution of the KBOs. The survey data were processed using an automatic moving-object detection algorithm, allowing a careful characterization of the biases involved. In this work, we quantify fundamental parameters of the classical KBOs (CKBOs), the most numerous objects found in our sample, using the new data and a maximum likelihood simulation. Deriving results from our best-fit model, we find that the size distribution follows a differential power law with exponent q = 4.0(-0.5)(+0.6) (1 sigma or 68.27% confidence). In addition, the CKBOs inhabit a very thick disk consistent with a Gaussian distribution of inclinations with a half-width of i(1/2) = 20(-4)(+6) deg (1 sigma). We estimate that there are N-CKBO(D>100 km) = 3.8 (+2.0)(-1.5) (1 sigma) CKBOs larger than 100 km in diameter. We also find compelling evidence for an outer edge to the CKBOs at heliocentric distances R = 50 AU.
引用
收藏
页码:457 / 473
页数:17
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