Size Dependence of the Bouncing Barrier in Protoplanetary Dust Growth

被引：15

作者：

Arakawa, Sota ^{[1
]}

Okuzumi, Satoshi ^{[2
]}

Tatsuuma, Misako ^{[2
]}

Tanaka, Hidekazu ^{[3
]}

Kokubo, Eiichiro ^{[4
]}

Nishiura, Daisuke ^{[1
]}

Furuichi, Mikito ^{[1
]}

Nakamoto, Taishi ^{[2
]}

机构：

[1] Japan Agcy Marine Earth Sci & Technol, 3173-25 Showa Machi,Kanazawa ku, Yokohama 2360001, Japan

[2] Tokyo Inst Technol, Dept Earth & Planetary Sci, 2-12-1 Ookayama, Tokyo 1528550, Japan

[3] Tohoku Univ, Grad Sch Sci, Astron Inst, 6-3 Aramaki,Aoba ku, Sendai 9808578, Japan

[4] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2023年 / 951卷 / 01期

关键词：

VELOCITY COLLISION BEHAVIOR; NUMERICAL-SIMULATION; FRAGMENTATION; POROSITY; PHYSICS; EFFICIENCY; STICKING; ICE; DISSIPATION; COMPRESSION;

D O I：

10.3847/2041-8213/acdb5f

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Understanding the collisional behavior of dust aggregates is essential in the context of planet formation. It is known that low-velocity collisions of dust aggregates result in bouncing rather than sticking when the filling factor of colliding dust aggregates is higher than a threshold value. However, a large discrepancy between numerical and experimental results on the threshold filling factor was reported so far. In this study, we perform numerical simulations using soft-sphere discrete element methods and demonstrate that the sticking probability decreases with increasing aggregate radius. Our results suggest that the large discrepancy in the threshold filling factor may reflect the difference in the size of dust aggregates in earlier numerical simulations and laboratory experiments.

引用

页数：7

共 41 条

[1] Threshold velocity for the collisional growth of porous dust aggregates consisting of cohesive frictionless spheres [J].