Effect of rotational disruption on the size-frequency distribution of the Main Belt asteroid population

被引：35
|
作者：
Jacobson, Seth A. [1 ,2 ,3 ]
Marzari, Francesco [4 ]
Rossi, Alessandro [5 ]
Scheeres, Daniel J. [6 ]
Davis, Donald R. [7 ]
机构：
[1] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA
[2] Observ Cote Azur, Lab Lagrange, F-06304 Nice 4, France
[3] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany
[4] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy
[5] IFAC CNR, I-50019 Florence, Italy
[6] Univ Colorado, Dept Aerosp & Engn Sci, Boulder, CO 80309 USA
[7] Planetary Sci Inst, Tucson, AZ 85719 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 439卷 / 01期
基金：
美国国家航空航天局;
关键词：
minor planets; asteroids: general; RUBBLE-PILE ASTEROIDS; BINARY ASTEROIDS; COLLISIONAL EVOLUTION; SPIN-UP; RATES; YARKOVSKY; EARTH; YORP; SIMULATION; DYNAMICS;
D O I：
10.1093/mnrasl/slu006
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The size distribution of small asteroids in the Main Belt is assumed to be determined by an equilibrium between the creation of new bodies out of the impact debris of larger asteroids and the destruction of small asteroids by collisions with smaller projectiles. However, for a diameter less than 6 km, we find that YORP-induced rotational disruption significantly contributes to the erosion even exceeding the effects of collisional fragmentation. Including this additional grinding mechanism in a collision evolution model for the asteroid belt, we generate size-frequency distributions from either an accretional or an 'Asteroids were born big' initial size-frequency distribution that are consistent with observations reported in Gladman et al. Rotational disruption is a new mechanism that must be included in all future collisional evolution models of asteroids.
引用
收藏
页码：L95 / L99
页数：5
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