Dynamical spreading of asteroid families by the Yarkovsky effect

被引:172
作者
Bottke, WF
Vokrouhlicky, D
Broz, M
Nesvorny, D
Morbidelli, A
机构
[1] SW Res Inst, Boulder, CO 80302 USA
[2] Charles Univ Prague, Inst Astron, CR-18000 Prague 8, Czech Republic
[3] Observ Cote Azur, F-06034 Nice 4, France
关键词
D O I
10.1126/science.1066760
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The orbital distributions of prominent asteroid families are thought to be direct by-products of catastrophic disruption events among diameter D greater than or similar to 100 kilometer bodies. Ejection velocities derived from studying observed families, however, are surprisingly high compared with results from impact experiments and simulations. One way to resolve this apparent contradiction is by assuming that D less than or similar to 20 kilometer family members, since their formation, have undergone semimajor axis drift by the thermal force called the Yarkovsky effect. interactions between drifting family members and resonances can also produce unique eccentricity and/or inclination changes. Together, these outcomes help explain (i) why families are sharply bounded by nearby Kirkwood gaps, (ii) why some families have asymmetric shapes, and (iii) the curious presence of family members on short-lived orbits.
引用
收藏
页码:1693 / 1696
页数:4
相关论文
共 33 条
[1]   Catastrophic disruptions revisited [J].
Benz, W ;
Asphaug, E .
ICARUS, 1999, 142 (01) :5-20
[2]   CHIPS OFF OF ASTEROID-4 VESTA - EVIDENCE FOR THE PARENT BODY OF BASALTIC ACHONDRITE METEORITES [J].
BINZEL, RP ;
XU, S .
SCIENCE, 1993, 260 (5105) :186-191
[3]   Dynamical evolution of main belt meteoroids: Numerical simulations incorporating planetary perturbations and Yarkovsky thermal forces [J].
Bottke, WF ;
Rubincam, DP ;
Burns, JA .
ICARUS, 2000, 145 (02) :301-331
[4]   Understanding the distribution of near-Earth asteroids [J].
Bottke, WF ;
Jedicke, R ;
Morbidelli, A ;
Petit, JM ;
Gladman, B .
SCIENCE, 2000, 288 (5474) :2190-2194
[5]  
BOTTKE WF, IN PRESS ICARUS
[6]  
CARRUBA V, 2001, AST 2001 PAL IT 10 1
[7]   The velocity-size relationship for members of asteroid families and implications for the physics of catastrophic collisions [J].
Cellino, A ;
Michel, P ;
Tanga, P ;
Zappalà, V ;
Paolicchi, P ;
Dell'Oro, A .
ICARUS, 1999, 141 (01) :79-95
[8]   Semimajor axis mobility of asteroidal fragments [J].
Farinella, P ;
Vokrouhlicky, D .
SCIENCE, 1999, 283 (5407) :1507-1510
[9]   Meteorite delivery via Yarkovsky orbital drift [J].
Farinella, P ;
Vokrouhlicky, D ;
Hartmann, WK .
ICARUS, 1998, 132 (02) :378-387
[10]   Dynamical lifetimes of objects injected into asteroid belt resonances [J].
Gladman, BJ ;
Migliorini, F ;
Morbidelli, A ;
Zappala, V ;
Michel, P ;
Cellino, A ;
Froeschle, C ;
Levison, HF ;
Bailey, M ;
Duncan, M .
SCIENCE, 1997, 277 (5323) :197-201