A Birth-Death-Migration Model for Life in Astrophysical Environments
arXiv:2306.10899 · doi:10.1093/mnras/stab3108
Abstract
To assess the number of life-bearing worlds in astrophysical environments, it is necessary to take the intertwined processes of abiogenesis (birth), extinction (death), and transfer of life (migration) into account. We construct a mathematical model that incorporates this trio of mechanisms and accordingly derive the probability distribution function and other statistical properties (e.g., mean) for the number of worlds with biospheres. We show that a given astrophysical setting may become eventually saturated with life if the rate of successful transfers of organisms is higher than the extinction rate of biospheres. Based on the available data, we suggest that this criterion might be fulfilled for star-forming clusters (and perhaps the Galactic bulge under optimal circumstances), thereby indicating that such regions could constitute promising abodes for hosting and detecting life.
arXiv comment8 pages, 3 figures. Published on 28 October 2021 in MNRAS
References in corpus (40)
- Building Terrestrial Planets
- The Birth Environment of the Solar System
- The Galactic Habitable Zone and the Age Distribution of Complex Life in the Milky Way
- Superhabitable Worlds
- Astrophysical Ionizing Radiation and the Earth: A Brief Review and Census of Intermittent Intense Sources
- Early evolution of the birth cluster of the solar system
- The Temporal Aspect of the Drake Equation and SETI
- Toward a Galactic Distribution of Planets. I. Methodology & Planet Sensitivities of the 2015 High-Cadence Spitzer Microlens Sample
- On the "Galactic Habitable Zone"
- Chaotic exchange of solid material between planetary systems: implications for lithopanspermia
- Lithopanspermia in Star Forming Clusters
- On the role of GRBs on life extinction in the Universe
- Natural Transfer of Viable Microbes in Space from Planets in the Extra-Solar Systems to a Planet in our Solar System and Vice-Versa
- About Exobiology: The Case for Dwarf K Stars
- A Stochastic Process Approach of the Drake Equation Parameters
- Enhanced interplanetary panspermia in the TRAPPIST-1 system
- Physical constraints for the evolution of life on exoplanets
- Galactic Panspermia
- Panspermia, Past and Present: Astrophysical and Biophysical Conditions for the Dissemination of Life in Space
- The Resilience of Life to Astrophysical Events
- Exploring the Galaxy using space probes
- The Fermi Paradox and the Aurora Effect: Exo-civilization Settlement, Expansion and Steady States
- The habitability of the Milky Way during the active phase of its central supermassive black hole
- Habitability in Different Milky Way Stellar Environments: a Stellar Interaction Dynamical Approach
- Evaporation of planetary atmospheres due to XUV illumination by quasars
- Habitable Evaporated Cores and the Occurrence of Panspermia near the Galactic Center
- Is Life Most Likely Around Sun-like Stars?
- Active Galactic Nuclei: Boon or Bane for Biota?
- A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy
- Reduced Diversity of Life Around Proxima Centauri and TRAPPIST-1
- Propulsion of Spacecrafts to Relativistic Speeds Using Natural Astrophysical Sources
- Role of stellar physics in regulating the critical steps for life
- Copernicanism and the Typicality in Time
- The Habitability of the Galactic Bulge
- Advanced Aspects of the Galactic Habitability
- The Impact of Tidal Disruption Events on Galactic Habitability
- 8 in 10 Stars in the Milky Way Bulge Experience Stellar Encounters Within 1000 AU in a Gigayear
- Cell-to-cell variability in organelle abundance reveals mechanisms of organelle biogenesis
- Feasibility of Detecting Interstellar Panspermia in Astrophysical Environments
- A Stationary Drake Equation Distribution as a Balance of Birth-Death Processes