Forming Binary Near-Earth Asteroids From Tidal Disruptions
Forming Binary Near-Earth Asteroids From Tidal Disruptions
Forming Binary Near-Earth Asteroids From Tidal Disruptions
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Figure 2.13: The eccentricity damping timescales for binaries as a function of their sizeratio and separation (a/R pri ). Plotted as dots are the simulation-produced binaries andplotted as solid squares are the NEA binaries.tered dramatically (Chauvineau & Farinella 1995; Bottke & Melosh 1996a). In addition,the thermal Yarkovsky and YORP effects have been identified as responsible for bothorbital evolution and spin axis re-orientation of asteroids (Chesley et al. 2003; Vokrouhlickýet al. 2003). Cuk & Burns (2004) propose that the YORP effect can alter the orbitof a synchronized secondary in a manner similar to how it affects a single body. Underideal circumstances it may work on time scales as short as 10 5 years, dominating tidal54