314 citations · 1.5k across the 35 of their papers we have counts for
29 papers · 1 filter
Volatile depletion in rocky planets as a chemical fingerprint of hybrid accretion
Haiyang S. Wang, Anders Johansen, Ziyan Xu +7
Volatile depletion in rocky planets relative to their host stars is commonplace in both the Solar System and exoplanetary systems, yet the connections between planet formation and…
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…
Evolution of dust in a protoplanetary disc driven by stellar flybys: implications for the streaming instability
Wei-Shan Su, Jeremy L. Smallwood, Min-Kai Lin +2
Stellar flybys are a common dynamical process in young stellar clusters and can significantly reshape protoplanetary discs. However, their impact on dust dynamics remains poorly un…
Observational Signatures of a Previous Dynamical Instability in Multi-planet M-Dwarf Systems
Anna C. Childs, Alexa P. S. Hua, Rebecca G. Martin +2
We identify observational signatures suggesting a history of dynamical instability in 26 out of 34 M-dwarf multi-planet systems containing no large planets. These systems may have…
Particle fragmentation inside planet-induced spiral waves
Linn E. J. Eriksson, Chao-Chin Yang, Philip J. Armitage
Growing planets interact with their surrounding protoplanetary disk, generating feedback effects that may promote or suppress nearby planet formation. We study how spiral waves lau…
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…
Dust-gas dynamics driven by the streaming instability with various pressure gradients
Stanley A. Baronett, Chao-Chin Yang, Zhaohuan Zhu
The streaming instability, a promising mechanism to drive planetesimal formation in dusty protoplanetary discs, relies on aerodynamic drag naturally induced by the background radia…
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…
Streaming Instability and Turbulence: Conditions for Planetesimal Formation
Jeonghoon Lim, Jacob B. Simon, Rixin Li +6
The streaming instability (SI) is a leading candidate for planetesimal formation, which can concentrate solids through two-way aerodynamic interactions with the gas. The resulting…
Composition constraints of the TRAPPIST-1 planets from their formation
Anna C. Childs, Cody Shakespeare, David R. Rice +2
We study the formation of the TRAPPIST-1 (T1) planets starting shortly after Moon-sized bodies form just exterior to the ice line. Our model includes mass growth from pebble accret…
The impact of dust evolution on the dead zone outer edge in magnetized protoplanetary disks
Timmy N. Delage, Matías Gárate, Satoshi Okuzumi +5
[Abridged] Aims. We provide an important step toward a better understanding of the magnetorotational instability (MRI)-dust coevolution in protoplanetary disks by presenting a proo…
Exciting spiral arms in protoplanetary discs from flybys
Jeremy L. Smallwood, Chao-Chin Yang, Zhaohuan Zhu +4
Spiral arms are observed in numerous protoplanetary discs. These spiral arms can be excited by companions, either on bound or unbound orbits. We simulate a scenario where an unboun…
An Analytical Theory for the Growth from Planetesimals to Planets by Polydisperse Pebble Accretion
Wladimir Lyra, Anders Johansen, Manuel H. Cañas +1
Pebble accretion is recognized as a significant accelerator of planet formation. Yet, only formulae for single-sized (monodisperse) distribution have been derived in the literature…
Particle clustering in turbulence: Prediction of spatial and statistical properties with deep learning
Yan-Mong Chan, Natascha Manger, Yin Li +4
We investigate the utility of deep learning for modeling the clustering of particles that are aerodynamically coupled to turbulent fluids. Using a Lagrangian particle module within…
Direct Formation of Planetary Embryos in Self-Gravitating Disks
Hans Baehr, Zhaohuan Zhu, Chao-Chin Yang
Giant planets have been discovered at large separations from the central star. Moreover, a striking number of young circumstellar disks have gas and/or dust gaps at large orbital s…
Formation of Dust Rings and Gaps in Non-ideal MHD Disks Through Meridional Gas Flows
Xiao Hu, Zhi-Yun Li, Zhaohuan Zhu +1
Rings and gaps are commonly observed in the dust continuum emission of young stellar disks. Previous studies have shown that substructures naturally develop in the weakly ionized g…
Streaming Instability with Multiple Dust Species: II. Turbulence and Dust-Gas Dynamics at Nonlinear Saturation
Chao-Chin Yang, Zhaohuan Zhu
The streaming instability is a fundamental process that can drive dust-gas dynamics and ultimately planetesimal formation in protoplanetary discs. As a linear instability, it has b…
Kozai-Lidov oscillations triggered by a tilt instability of detached circumplanetary discs
Rebecca G. Martin, Zhaohuan Zhu, Philip J. Armitage +2
Circumplanetary discs can be linearly unstable to the growth of disc tilt in the tidal potential of the star-planet system. We use three-dimensional hydrodynamical simulations to c…
Formation of the polar debris disc around 99 Herculis
Jeremy L. Smallwood, Alessia Franchini, Cheng Chen +4
We investigate the formation mechanism for the observed nearly polar aligned (perpendicular to the binary orbital plane) debris ring around the eccentric orbit binary 99 Herculis.…
Morphological signatures induced by dust back reaction in discs with an embedded planet
Chao-Chin Yang, Zhaohuan Zhu
Recent observations have revealed a gallery of substructures in the dust component of nearby protoplanetary discs, including rings, gaps, spiral arms, and lopsided concentrations.…
Diffusion and Concentration of Solids in the Dead Zone of a Protoplanetary Disk
Chao-Chin Yang, Mordecai-Mark Mac Low, Anders Johansen
The streaming instability is a promising mechanism to drive the formation of planetesimals in protoplanetary disks. To trigger this process, it has been argued that sedimentation o…
Streaming Instability of Multiple Particle Species in Protoplanetary Disks
Noemi Schaffer, Chao-Chin Yang, Anders Johansen
The radial drift and diffusion of dust particles in protoplanetary disks affect both the opacity and temperature of such disks as well as the location and timing of planetesimal fo…
Initial mass function of planetesimals formed by the streaming instability
Urs Schäfer, Chao-Chin Yang, Anders Johansen
The streaming instability is a mechanism to concentrate solid particles into overdense filaments that undergo gravitational collapse and form planetesimals. However, it remains unc…