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We review the properties of dust in protoplanetary disks around optically visible pre-main sequence stars obtained with a variety of observational techniques, from measurements of scattered light at visual and infrared wavelengths to…

Astrophysics · Physics 2007-05-23 A. Natta , L. Testi , N. Calvet , Th. Henning , R. Waters , D. Wilner

Planets are a natural byproduct of the stellar formation process, resulting from local aggregations of material within the disks surrounding young stars. Whereas signatures of gas-giant planets at large orbital separations have been…

Dust trapping in the global pressure bump induced by magnetospheric truncation offers a promising formation mechanism for close-in super-Earths/sub-Neptunes. These planets likely form in evolved protoplanetary discs, where the gas…

Earth and Planetary Astrophysics · Physics 2024-02-23 Rixin Li , Yi-Xian Chen , Douglas N. C. Lin

The past decade has seen a revolution in our understanding of protoplanetary disk evolution and planet formation in single star systems. However, the majority of solar-type stars form in binary systems, so the impact of binary companions on…

Earth and Planetary Astrophysics · Physics 2015-05-30 Adam L. Kraus , Michael J. Ireland , Lynne A. Hillenbrand , Frantz Martinache

Observations of the youngest planets ($\sim$1-10 Myr for a transitional disk) will increase the accuracy of our planet formation models. Unfortunately, observations of such planets are challenging and time-consuming to undertake even in…

Earth and Planetary Astrophysics · Physics 2016-03-23 Jack Dobinson , Zoe M. Leinhardt , Stefan Lines , Philip J. Carter , Sarah E. Dodson-Robinson , Nick A. Teanby

We study the dependence of protoplanetary disk evolution on stellar mass using a large sample of young stellar objects in nearby young star-forming regions. We update the protoplanetary disk fractions presented in our recent work (paper I…

Solar and Stellar Astrophysics · Physics 2016-08-08 Álvaro Ribas , Hervé Bouy , Bruno Merín

The similar orbital distances and detection rates of debris disks and the prominent rings observed in protoplanetary disks suggest a potential connection between these structures. We explore this connection with new calculations that follow…

Earth and Planetary Astrophysics · Physics 2022-02-02 Joan R. Najita , Scott J. Kenyon , Benjamin C. Bromley

Context: The global size and spatial distribution of dust is an important ingredient in the structure and evolution of protoplanetary disks and in the formation of larger bodies, such as planetesimals. Aims: We aim to derive simple…

Earth and Planetary Astrophysics · Physics 2012-03-12 T. Birnstiel , H. Klahr , B. Ercolano

Dust and gas in protoplanetary disks dissipate as central stars evolve. In order to estimate the dust dissipation timescales in the protoplanetary disks, we stacked the WISE 12, 22, and the AKARI 90 $\mu$m survey images of known T Tauri…

Solar and Stellar Astrophysics · Physics 2021-11-17 Hiroshi Maeshima , Takao Nakagawa , Takuya Kojima , Satoshi Takita , Jungmi Kwon

The solid content of circumstellar disks is inherited from the interstellar medium: dust particles of at most a micrometer in size. Protoplanetary disks are the environment where these dust grains need to grow at least 13 orders of…

Solar and Stellar Astrophysics · Physics 2016-05-19 T. Birnstiel , M. Fang , A. Johansen

We use a semi-analytic circumstellar disk model that considers movement of the snow line through evolution of accretion and the central star to investigate how gas giant frequency changes with stellar mass. The snow line distance changes…

Astrophysics · Physics 2009-11-13 Grant M. Kennedy , Scott J. Kenyon

We investigate the dynamics of dust concentration in actively accreting, substructured, non-ideal MHD wind-launching disks using 2D and 3D simulations incorporating pressureless dust fluids of various grain sizes and their aerodynamic…

Earth and Planetary Astrophysics · Physics 2025-05-14 Chun-Yen Hsu , Zhi-Yun Li , Yisheng Tu , Xiao Hu , Min-Kai Lin

The streaming instability is often invoked as solution to the fragmentation and drift barriers in planetesimal formation, catalyzing the aggregation of dust on kyr timescales to grow km-sized cores. However there remains a lack of consensus…

Earth and Planetary Astrophysics · Physics 2017-10-11 Barbara Ercolano , Jeff Jennings , Giovanni Rosotti , Tilmann Birnstiel

We consider trends resulting from two formation mechanisms for short-period super-Earths: planet-planet scattering and migration. We model scenarios where these planets originate near the snow line in ``cold finger'' circumstellar disks.…

Astrophysics · Physics 2009-11-13 Grant M. Kennedy , Scott J. Kenyon

Planetesimal formation is still mysterious. One of the ways to form planetesimals is to invoke a gas pressure bump in a protoplanetary disc. In our previous paper, we propose a new scenario in which the piled-up dust at a gas pressure bump…

Earth and Planetary Astrophysics · Physics 2023-10-11 Yuhito Shibaike , Yann Alibert

While most debris disks consist of dust with little or no gas, a fraction has significant amounts of gas detected via emission lines of CO, ionized carbon, and/or atomic oxygen. Almost all such gaseous debris disks known are around A-type…

Earth and Planetary Astrophysics · Physics 2023-11-07 Riouhei Nakatani , Neal J. Turner , Yasuhiro Hasegawa , Gianni Cataldi , Yuri Aikawa , Sebastián Marino , Hiroshi Kobayashi

Using radiation hydrodynamics simulations, we explore the evolution of circumplanetary disks around wide-orbit proto-gas giants. At large distances from the star (~100 AU), gravitational instability followed by disk fragmentation can form…

Earth and Planetary Astrophysics · Physics 2015-06-15 Megan Shabram , Aaron Boley

Dust grains in protoplanetary disks are the building blocks of planets. Investigating the dust composition and size, and their variation over time, is crucial for understanding the planet formation process. The PDS 70 disk is so far the…

Earth and Planetary Astrophysics · Physics 2025-01-13 Yao Liu , Dafa Li , Hongchi Wang , Haoran Feng , Min Fang , Fujun Du , Thomas Henning , Giulia Perotti

Flattened, rotating disks of cool dust and gas extending for tens to hundreds of AU are found around almost all low mass stars shortly after their birth. These disks generally persist for several Myr, during which time some material…

Astrophysics of Galaxies · Physics 2011-08-30 Jonathan P. Williams , Lucas A. Cieza

Exoplanet demographic surveys have revealed that close-in (${\lesssim}$1 au) small planets orbiting stars in the Milky Way's thick disk are ${\sim}50\%$ less abundant than those orbiting stars in the Galactic thin disk. One key difference…

Earth and Planetary Astrophysics · Physics 2024-12-10 Tim Hallatt , Eve J. Lee