| fhlwb {extraterrestrial} | R Documentation |
Probability of Life in the Universe
Description
The statistical estimates on the probaility of life in the Universe based on the paper of Frederic Foucher, Keyron Hickman-Lewis, Frances Westall and Andre Brack (2017).
Usage
fhlwb(pS, pB, pC, pL, pR, pP, S, V)
Arguments
pS |
the proportion of stellar systems having a star compatible with the occurrence of the considered stage of life. |
pB |
the proportion of these star systems with a rocky body located within its habitable zone. |
pC |
the proportion of rocky bodies compatible with the emergence of life. |
pL |
the probability that life appeared on these bodies. |
pR |
the probability that life reached the considered evolutionary stage on these bodies. |
pP |
the probability of co-existence occurrence of this stage of life on several bodies simultaneously. |
S |
number of stars in the galaxy in billions |
V |
volume of the galaxy in trillions light year cube (ly^3) |
Value
A list with the following values:
PL Estimated proportion of star systems hosting life (
NL Estimated number of planets life.
DL Average distance between two planets hosting life (in light years).
References
Foucher, F., Hickman-Lewis, K., Westall, F., & Brack, A. (2017). A statistical approach to illustrate the challenge of astrobiology for public outreach. Life, 7(4). <doi:10.3390/life7040040>
Examples
fhlwb(pS=1, pB=1, pC=.22, pL=.17, pR=1, pP=0.9, V=47, S=200)