White dwarf planetary debris dependence on physical structure distributions within asteroid belts

ABSTRACT White dwarfs that exhibit transit signatures of planetary debris and accreted material provide exceptional opportunities to probe the composition dynamical structure systems. Although previous theoretical work investigating role minor body disruption around white has focused on spherical bodies, Solar system asteroids can be more accurately modelled as triaxial ellipsoids. Here, we present an analytical framework identify type (tidal fragmentation, total sublimation, or direct impact) experienced by approaching extremely eccentric (e ∼ 1) orbits. This is then used outcomes for simplified Main belt analogues 100 bodies across five different dwarf temperatures. We also empirical relationship between cooling age effective temperature both DA DB considered here. find using a purely shape model underestimate physical size radial distance at which asteroid subjected complete these differences increase with greater elongation body. Contrastingly, fragmentation always occurs in largest semi-axis so sphere radius. Both sublimation are greatly affected body’s composition, hence their progenitor belts. The temperature, age, affect expected distribution: higher temperatures sublimate large elongated asteroids, cooler accommodate impacts.