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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 been shown that its growth with a distribution of dust sizes…

Earth and Planetary Astrophysics · Physics 2021-10-20 Chao-Chin Yang , Zhaohuan Zhu

The streaming instability is thought to play a central role in the early stages of planet formation by enabling the efficient bypass of a number of barriers hindering the formation of planetesimals. We present the first study exploring the…

Earth and Planetary Astrophysics · Physics 2019-06-19 Leonardo Krapp , Pablo Benítez-Llambay , Oliver Gressel , Martin E. Pessah

Streaming instability is a powerful mechanism which concentrates dust grains in pro- toplanetary discs, eventually up to the stage where they collapse gravitationally and form planetesimals. Previous studies inferred that it should be…

Earth and Planetary Astrophysics · Physics 2017-11-01 Jérémy Auffinger , Guillaume Laibe

The streaming instability is an efficient method for overcoming the barriers to planet formation in protoplanetary discs. The streaming instability has been extensively modelled by hydrodynamic simulations of gas and a single dust size.…

Earth and Planetary Astrophysics · Physics 2025-03-19 Jip Matthijsse , Hossam Aly , Sijme-Jan Paardekooper

The streaming instability is a leading mechanism for concentrating solids and initiating planetesimal formation in protoplanetary disks. Although numerous studies have explored its linear growth, nonlinear evolution, and implications for…

The streaming instability, a promising mechanism to drive planetesimal formation in dusty protoplanetary discs, relies on aerodynamic drag naturally induced by the background radial pressure gradient. This gradient should vary in disks, but…

Earth and Planetary Astrophysics · Physics 2026-03-09 Stanley A. Baronett , Chao-Chin Yang , Zhaohuan Zhu

The streaming instability is a promising mechanism to overcome the barriers in direct dust growth and lead to the formation of planetesimals. Most previous studies of the streaming instability, however, were focused on a local region of a…

Earth and Planetary Astrophysics · Physics 2015-06-22 Chao-Chin Yang , Anders Johansen

We develop simple, physically motivated models for drag-induced dust-gas streaming instabilities, which are thought to be crucial for clumping grains to form planetesimals in protoplanetary disks. The models explain, based on the physics of…

Earth and Planetary Astrophysics · Physics 2020-08-19 Jonathan Squire , Philip F. Hopkins

We introduce a polydisperse version of the streaming instability, where the dust component is treated as a continuum of sizes. We show that its behaviour is remarkably different from the monodisperse streaming instability. We focus on…

Earth and Planetary Astrophysics · Physics 2020-10-21 Sijme-Jan Paardekooper , Colin P. McNally , Francesco Lovascio

The streaming instability is a promising mechanism to induce the formation of planetesimals. Nonetheless, this process has been found in previous studies to require either a dust-to-gas surface density ratio or a dust size that is enhanced…

Earth and Planetary Astrophysics · Physics 2022-10-19 Urs Schäfer , Anders Johansen

Streaming instability is considered to be one of the dominant processes to promote planetesimal formation by gravitational collapse of dust clumps. The development of streaming instability is expected to form dust clumps in which the local…

Earth and Planetary Astrophysics · Physics 2023-10-10 Ryosuke T. Tominaga , Hidekazu Tanaka

Under the right conditions, the streaming instability between imperfectly coupled dust and gas is a powerful mechanism for planetesimal formation as it can concentrate dust grains to the point of gravitational collapse. In its simplest…

Earth and Planetary Astrophysics · Physics 2021-02-04 Min-Kai Lin

The streaming instability is a popular candidate for planetesimal formation by concentrating dust particles to trigger gravitational collapse. However, its robustness against physical conditions expected in protoplanetary disks is unclear.…

Earth and Planetary Astrophysics · Physics 2020-03-25 Kan Chen , Min-Kai Lin

We identify and study a number of new, rapidly growing instabilities of dust grains in protoplanetary disks, which may be important for planetesimal formation. The study is based on the recognition that dust-gas mixtures are generically…

Earth and Planetary Astrophysics · Physics 2018-04-18 Jonathan Squire , Philip F. Hopkins

Dust grains embedded in gas flow give rise to a class of hydrodynamic instabilities, called resonant drag instabilities. These instabilities have predominantly been studied for single grain sizes, in which case they are found to grow fast.…

Earth and Planetary Astrophysics · Physics 2025-05-07 Sijme-Jan Paardekooper , Hossam Aly

We present numerical simulations of dust clumping and planetesimal formation initiated by the streaming instability with self-gravity. We examine the variability in the planetesimal formation process by employing simulation domains with…

Earth and Planetary Astrophysics · Physics 2020-11-04 Josef Rucska , James Wadsley

Streaming instability can be a very efficient way of overcoming growth and drift barriers to planetesimal formation. However, it was shown that strong clumping, which leads to planetesimal formation, requires a considerable number of large…

Earth and Planetary Astrophysics · Physics 2014-12-03 Joanna Drazkowska , Cornelis P. Dullemond

Planet formation via core accretion requires the production of km-sized planetesimals from cosmic dust. This process must overcome barriers to simple collisional growth, for which the Streaming Instability (SI) is often invoked. Dust…

Earth and Planetary Astrophysics · Physics 2021-01-27 Colin P. McNally , Francesco Lovascio , Sijme-Jan Paardekooper

The streaming instability is a leading candidate mechanism to explain the formation of planetesimals. Yet, the role of this instability in the driving of turbulence in protoplanetary disks, given its fundamental nature as a linear…

Earth and Planetary Astrophysics · Physics 2020-04-08 Urs Schäfer , Anders Johansen , Robi Banerjee

The streaming instability is considered one of the leading candidates for the formation of planetesimals, due to its ability to overcome the bouncing and fragmentation barriers. The formation of dense dust clumps through this process,…

Earth and Planetary Astrophysics · Physics 2025-12-17 Arnaud Pierens , Thomas Collin-Dufresne , Min-Kai Lin , Emmanuel DiFolco
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