Volatile Delivery to Planets from Water-rich Planetesimals around Low Mass Stars

Abstract

Most models of volatile delivery to accreting terrestrial planets assume that the carriers for water are similar in water content to the carbonaceous chondrites in our Solar System. Here we suggest that the water content of primitive bodies in many planetary systems may actually be much higher, as carbonaceous chondrites have lost some of their original water due to heating from short-lived radioisotopes that drove parent body alteration. Using N-body simulations, we explore how planetary accretion would be different if bodies beyond the water line contained a water mass fraction consistent with chemical equilibrium calculations, and more similar to comets, as opposed to the more traditional water-depleted values. We apply this model to consider planet formation around stars of different masses and identify trends in the properties of Habitable Zone planets and planetary system architecture which could be tested by ongoing exoplanet census data collection. Comparison of such data with the model predicted trends will serve to evaluate how well the N-body simulations and the initial conditions used in studies of planetary accretion can be used to understand this stage of planet formation.

Accepted to ApJ

References in corpus (14)

• The origins and concentrations of water, carbon, nitrogen and noble gases on Earth
• Mass-Radius Relationships for Solid Exoplanets
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Solar System evolution from compositional mapping of the asteroid belt
• Exotic Earths: Forming Habitable Worlds with Giant Planet Migration
• On the Location of the Snow Line in a Protoplanetary Disk
• A decreased probability of habitable planet formation around low-mass stars
• Observable Consequences of Planet Formation Models in Systems with Close-in Terrestrial Planets
• A novel L-band imaging search for giant planets in the Tucana and Beta Pictoris moving groups
• Chemistry in an Evolving Protoplanetary Disk: Effects on Terrestrial Planet Composition
• Inheritance of solar short- and long-lived radionuclides from molecular clouds and the unexceptional nature of the solar system
• On the likelihood of supernova enrichment of protoplanetary disks
• The Effect of Planets Beyond the Ice Line on the Accretion of Volatiles by Habitable-Zone Rocky Planets
• Distributions of Short-Lived Radioactive Nuclei Produced by Young Embedded Stellar Clusters

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