206 citations · 762 across the 7 of their papers we have counts for
7 papers
Growth after the streaming instability: from planetesimal accretion to pebble accretion
Beibei Liu, Chris W. Ormel, Anders Johansen
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…
Hydrodynamics of Embedded Planets' First Atmospheres. II. A Rapid Recycling of Atmospheric Gas
Chris W. Ormel, Ji-Ming Shi, Rolf Kuiper
Following Paper I we investigate the properties of atmospheres that form around small protoplanets embedded in a protoplanetary disc by conducting hydrodynamical simulations. These…
Hydrodynamics of Embedded Planets' First Atmospheres. I. A Centrifugal Growth Barrier for 2D Flows
Chris W. Ormel, Rolf Kuiper, Ji-Ming Shi
In the core accretion paradigm of planet formation, gas giants only form a massive atmosphere after their progenitors exceeded a threshold mass: the critical core mass. Most (exo)p…
On the filtering and processing of dust by planetesimals 1. Derivation of collision probabilities for non-drifting planetesimals
Tristan Guillot, Shigeru Ida, Chris W. Ormel
Context. Circumstellar disks are known to contain a significant mass in dust ranging from micron to centimeter size. Meteorites are evidence that individual grains of those sizes w…
An Atmospheric Structure Equation for Grain Growth
Chris W. Ormel
We present a method to include the evolution of the grain size and grain opacity in the equations describing the structure of protoplanetary atmospheres. The key as…
Planetesimal driven migration as an explanation for observations of high levels of warm, exozodiacal dust
Amy Bonsor, Sean N. Raymond, Jean-Charles Augereau +1
High levels of exozodiacal dust have been observed in the inner regions of a large fraction of main sequence stars. Given the short lifetime of the observed small dust grains, thes…