Revising the age for the Baptistina asteroid family using WISE/NEOWISE data

Дата и время публикации : 2012-09-07T00:56:38Z

Авторы публикации и институты :
Joseph R. Masiero
A. K. Mainzer
T. Grav
J. M. Bauer
R. Jedicke

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 27 pages, 16 figures, accepted to ApJ
Первичная категория: astro-ph.EP

Все категории : astro-ph.EP

Краткий обзор статьи: We have used numerical routines to model the evolution of a simulated Baptistina family to constrain its age in light of new measurements of the diameters and albedos of family members from the Wide-field Infrared Survey Explorer. We also investigate the effect of varying the assumed physical and orbital parameters on the best-fitting age. We find that the physically allowed range of assumed values for the density and thermal conductivity induces a large uncertainty in the rate of evolution. When realistic uncertainties in the family members’ physical parameters are taken into account we find the best-fitting age can fall anywhere in the range of 140-320 Myr. Without more information on the physical properties of the family members it is difficult to place a more firm constraint on Baptistina’s age.

Category: Physics