English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Models of planet formation have shown that giant planets have a large impacton the number, masses and orbits of terrestrial planets that form. In addition,they play an important role in delivering volatiles from material that formedexterior to the snow-line (the region in the disk beyond which water ice cancondense) to the inner region of the disk where terrestrial planets canmaintain liquid water on their surfaces. We present simulations of the latestages of terrestrial planet formation from a disk of protoplanets around asolar-type star, and we include a massive planet (from 1 Earth mass to 1Jupiter mass) in Jupiter's orbit at ~5.2 AU in all but one set of simulations.Two initial disk models are examined with the same mass distribution and totalinitial water content, but with different distributions of water content. Wecompare the accretion rates and final water mass fraction of the planets thatform. Remarkably, all of the planets that formed in our simulations withoutgiant planets were water-rich, showing that giant planet companions are notrequired to deliver volatiles to terrestrial planets in the habitable zone. Incontrast, an outer planet at least several times the mass of Earth may beneeded to clear distant regions from debris truncating the epoch of frequentlarge impacts. Observations of exoplanets from radial velocity surveys suggestthat outer Jupiter-like planets may be scarce, therefore the results presentedhere suggest the number of habitable planets that reside in our galaxy may bemore than previously thought.

The Effect of Planets Beyond the Ice Line on the Accretion of Volatiles by Habitable-Zone Rocky Planets