Dynamical and Biological Panspermia Constraints Within Multiplanet Exosystems

Dimitri Veras, David J. Armstrong, James A. Blake, Jose F. Gutiérrez-Marcos, Alan P. Jackson, Hendrik Schäefer
2018 Astrobiology  
As discoveries of multiple planets in the habitable zone of their parent star mount, developing analytical techniques to quantify extrasolar intra-system panspermia will become increasingly important. Here, we provide user-friendly prescriptions that describe the asteroid impact characteristics which would be necessary to transport life both inwards and outwards within these systems within a single framework. Our focus is on projectile generation and delivery and our expressions are algebraic,
more » ... liminating the need for the solution of differential equations. We derive a probability distribution function for life-bearing debris to reach a planetary orbit, and describe the survival of micro-organisms during planetary ejection, their journey through interplanetary space, and atmospheric entry.
doi:10.1089/ast.2017.1786 pmid:30095987 fatcat:mazjzv4eufcjfmxsprshf53zzq