11 citations · 18 across the 14 of their papers we have counts for
14 papers
Exploring the conditions for forming planetesimals by the streaming instability and planetary systems by pebble accretion
Anders Johansen, Wladimir Lyra
The streaming instability and pebble accretion are two physical mechanisms with demonstrated potentials to drive, respectively, the formation of planetesimals and the growth of pla…
A Comparative Study of the Streaming Instability: Unstratified Models with Marginally Coupled Grains
Stanley A. Baronett, Wladimir Lyra, Hossam Aly +19
The streaming instability is a leading mechanism for concentrating solids and initiating planetesimal formation in protoplanetary disks. Although numerous studies have explored its…
The Streaming Instability in 3D: Conditions for Strong Clumping
Jeonghoon Lim, Jacob B. Simon, Rixin Li +3
The streaming instability (SI) is a leading mechanism for planetesimal formation, driving the aerodynamic concentration of solids in protoplanetary disks. The SI triggers strong cl…
On the Mass Budget Problem of Protoplanetary Disks: Streaming Instability and Optically Thick Emission
Daniel Godines, Wladimir Lyra, Luca Ricci +4
Statistical studies of protoplanetary disks and exoplanet populations often exhibit a "missing mass" problem, where observed dust masses in (sub-)millimeter surveys are significant…
Bridging Unstratified and Stratified Simulations of the Streaming Instability for Grains
Jeonghoon Lim, Stanley A. Baronett, Jacob B. Simon +4
The streaming instability (SI), driven by aerodynamic coupling between solids and the gas under a global radial pressure gradient, concentrates solids and facilitates planetesimal…
Positive Feedback II: How Dust Coagulation inside Vortices Can Form Planetesimals at Low Metallicity
Daniel Carrera, Linn E. J. Eriksson, Jeonghoon Lim +2
The origin of planetesimals (100 km planet building blocks) has confounded astronomers for decades, as numerous growth barriers appear to impede their formation. In a recent…
Positive Feedback: How a Synergy Between the Streaming Instability and Dust Coagulation Forms Planetesimals
Daniel Carrera, Jeonghoon Lim, Linn E. J. Eriksson +2
One of the most important open questions in planet formation is how dust grains in a protoplanetary disk manage to overcome growth barriers and form the 100km planet building…
Planets and planetesimals at cosmic dawn: Vortices as planetary nurseries
Linn E. J. Eriksson, Shyam Menon, Daniel Carrera +2
Low-mass, metal-enriched stars were likely present as early as cosmic dawn. In this work, we investigate whether these stars could have hosted planets in their protoplanetary disks…
Probing Conditions for Strong Clumping by the Streaming Instability: Small Dust Grains and Low Dust-to-gas Density Ratio
Jeonghoon Lim, Jacob B. Simon, Rixin Li +5
The streaming instability (SI) is a leading mechanism for concentrating solid particles into regions dense enough to form planetesimals. Its efficiency in clumping particles depend…
Rapid protoplanet formation in vortices: three-dimensional local simulations with selfgravity
Wladimir Lyra, Chao-Chin Yang, Jacob B. Simon +2
Disk vortices, seen in numerical simulations of protoplanetary disks and found observationally in ALMA and VLA images of these objects, are promising sites for planet formation giv…
Magnetically Driven Turbulence in the Inner Regions of Protoplanetary Disks
David G. Rea, Jacob B. Simon, Daniel Carrera +5
Given the important role turbulence plays in the settling and growth of dust grains in protoplanetary disks, it is crucial that we determine whether these disks are turbulent and t…
Length and Velocity Scales in Protoplanetary Disk Turbulence
Debanjan Sengupta, Jeffrey N. Cuzzi, Orkan M. Umurhan +1
In the theory of protoplanetary disk turbulence, a widely adopted \emph{ansatz}, or assumption, is that the turnover frequency of the largest turbulent eddy, , is the local Ke…
A solution for the density dichotomy problem of Kuiper Belt objects with multi-species streaming instability and pebble accretion
Manuel H. Cañas, Wladimir Lyra, Daniel Carrera +6
Kuiper belt objects show an unexpected trend, whereby large bodies have increasingly higher densities, up to five times greater than their smaller counterparts. Current explanation…
Viscous heating as the dominant heat source inside the water snowline of V883 Ori
Felipe Alarcón, Simón Casassus, Wladimir lyra +2
FU Orionis-type objects(FUors) are embedded protostars that undergo episodes of high accretion, potentially indicating a widespread but poorly understood phase in the formation of…