Matches in SemOpenAlex for { <https://semopenalex.org/work/W4288378082> ?p ?o ?g. }
- W4288378082 endingPage "A114" @default.
- W4288378082 startingPage "A114" @default.
- W4288378082 abstract "Streaming instability is a key mechanism in planet formation, clustering pebbles into planetesimals. It is triggered at a particular disk location where the local volume density of solids exceeds that of the gas. After their formation, planetesimals can grow by feeding from other planetesimals in the birth ring as well as by accreting inwardly drifting pebbles from the outer disk. To investigate the growth of planetesimals at a single location by the streaming instability, we test the conditions under which super-Earths are able to form within the lifetime of the gaseous disk. We modify the texttt{Mercury} N-body code to trace the growth and dynamical evolution of a swarm of planetesimals at the ice line for a solar-mass star. Three distributions of planetesimal sizes are investigated: (i) a mono-dispersed population of 400 km radius planetesimals, (ii) a poly-dispersed populations of planetesimals from 200 km up to 1000 km, (iii) a bimodal distribution with a single runaway body and a swarm of smaller, 100 km size planetesimals. The mono-disperse population of 400 km size planetesimals cannot form $gtrsim$ Earth mass protoplanets. Their velocity dispersions are quickly excited, which suppresses both planetesimal and pebble accretion. Planets can form from the poly-dispersed and bimodal distributions. In these circumstances, the two-component nature damps the random velocity of the large embryo by small planetesimals' dynamical friction, allowing the embryo to accrete pebbles efficiently when it approaches $10^{-2}$ Earth mass. We find that super-Earth planets are preferred to form when the pebble mass flux is higher, the disk turbulence is lower, or the Stokes number of the pebbles is higher." @default.
- W4288378082 created "2022-07-29" @default.
- W4288378082 creator A5060482209 @default.
- W4288378082 creator A5068874155 @default.
- W4288378082 creator A5085536657 @default.
- W4288378082 date "2019-04-01" @default.
- W4288378082 modified "2023-10-18" @default.
- W4288378082 title "Growth after the streaming instability" @default.
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