PUMA
Istituto di Scienza e Tecnologie dell'Informazione     
Rossi A., Marzari A., Scheeres D., Jacobson S. Effects of YORP-induced rotational fission on the asteroid size distribution at the small size end. In: 43rd Lunar and Planetary Science Conference (The Woddland, Texas (USA), 19-23 Marzo 2012). Abstract, pp. 2095 - 2095. Lunar and planetary Insitute, 2012.
 
 
Abstract
(English)
The asteroid belt size distribution has been shaped by collisions slowly grinding the population away into smaller bodies via cratering or fragmentation. However, at the small size end YORP may contribute to the ero- sion process by accelerating the rotation rate of small as- teroids beyond their disruption spin limit causing mass shedding and fission. This can explain why, according to NEOWISE, the slope of NEOs is about -1.32, significantly less steep than previous estimates which ac- counted for the Yarkovsky steepening effect.
Subject Asteroids
Rotational dynamics
YORP effect
Collisions
J.2 PHYSICAL SCIENCES AND ENGINEERING


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