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Recent observations of several protoplanetary discs have found evidence of departures from flat, circular motion in the inner regions of the disc. One possible explanation for these observations is a disc warp, which could be induced by a…

Earth and Planetary Astrophysics · Physics 2018-08-29 Rebecca Nealon , Giovanni Dipierro , Richard Alexander , Rebecca Martin , Chris Nixon

The final stages of a protoplanetary disk are essential for our understanding of the formation and evolution of planets. Photoevaporation is an important mechanism that contributes to the dispersal of an accretion disk and has significant…

Earth and Planetary Astrophysics · Physics 2024-07-17 M. Cecil , L. Gehrig , D. Steiner

Recent high angular resolution ALMA observations have revealed numerous gaps in protoplanetary disks. A popular interpretation has been that planets open them. Most previous investigations of planet gap-opening have concentrated on viscous…

Earth and Planetary Astrophysics · Physics 2023-06-28 Xiao Hu , Zhi-Yun Li , Lile Wang , Zhaohuan Zhu , Jaehan Bae

There is growing theoretical and observational evidence that protoplanetary disc evolution may be significantly affected by the canonical levels of far ultraviolet (FUV) radiation found in a star forming environment, leading to substantial…

Solar and Stellar Astrophysics · Physics 2016-09-21 Thomas J. Haworth , Douglas Boubert , Stefano Facchini , Thomas G. Bisbas , Cathie J. Clarke

The radioactive decay of aluminum-26 ($^{26}$Al) is an important heating source in early planet formation. Since its discovery, there have been several mechanisms proposed to introduce $^{26}$Al into protoplanetary disks, primarily through…

Solar and Stellar Astrophysics · Physics 2020-07-28 Brandt A. L. Gaches , Stefanie Walch , Stella S. R. Walch , Carsten Münker

Non-ideal magnetohydrodynamic effects that rule the coupling of the magnetic field to the circumstellar gas during the low-mass star formation process depend heavily on the local physical conditions, such as the ionization fraction of the…

Recent ALMA observations with 0''.1 resolution reveal characteristic substructures in circumstellar disks around young Class I sources, providing clues to the early stages of morphological disk evolution. In this paper, we applied PRIISM…

Earth and Planetary Astrophysics · Physics 2026-01-15 Ayumu Shoshi , Masayuki Yamaguchi , Mitsuki Omura , Kazuki Tokuda , Naofumi Fukaya , Kengo Tachihara , Masahiro. N. Machida

The composition of a protoplanetary disk is set by a combination of interstellar inheritance and gas and grain surface chemical reactions within the disk. The survival of inherited molecules, as well as the disk in situ chemistry depends on…

Solar and Stellar Astrophysics · Physics 2020-03-04 Ellen M. Price , L. Ilsedore Cleeves , Karin I. Öberg

Protoplanetary disks are believed to evolve on Myr timescales in a diffusive (viscous) manner as a result of angular momentum transport driven by internal stresses. Here we use a sample of 26 protoplanetary disks resolved by ALMA with…

Earth and Planetary Astrophysics · Physics 2017-03-22 Roman R. Rafikov

The gas mass of protoplanetary disks, and the gas-to-dust ratio, are two key elements driving the evolution of these disks and the formation of planetary system. We explore here to what extent CO (or its isotopologues) can be used as a…

Solar and Stellar Astrophysics · Physics 2015-07-15 L. Reboussin , V. Wakelam , S. Guilloteau , F. Hersant , A. Dutrey

While it is generally accepted that the magnetic field and its non-ideal effects play important roles during the stellar formation, simple models of pure hydrodynamics and angular momentum conservation are still widely employed in the…

Earth and Planetary Astrophysics · Physics 2021-04-21 Yueh-Ning Lee , Sébastien Charnoz , Patrick Hennebelle

The powerful, high-energy magnetic activities of young stars play important roles in the magnetohydrodynamics in the innermost parts of the protoplanetary disks. In addition, the associated UV and X-ray emission dictates the photochemistry;…

Protoplanetary discs spend their lives in the dense environment of a star forming region. While there, they can be affected by nearby stars through external photoevaporation and dynamic truncations. We present simulations that use the AMUSE…

We use one-dimensional two-zone time-dependent accretion disk models to study the long-term evolution of protostellar disks subject to mass addition from the collapse of a rotating cloud core. Our model consists of a constant surface…

Solar and Stellar Astrophysics · Physics 2015-05-18 Zhaohuan Zhu , Lee Hartmann , Charles Gammie

We aim to understand the effect of stellar evolution on the evolution of protoplanetary disks. We focus in particular on the disk evolution around intermediate-mass (IM) stars, which evolve more rapidly than low-mass ones. We numerically…

Earth and Planetary Astrophysics · Physics 2021-03-16 Masanobu Kunitomo , Shigeru Ida , Taku Takeuchi , Olja Panić , James M. Miley , Takeru K. Suzuki

Most of the exoplanets discovered in our galaxy to date orbit low-mass stars, which tend to host small disks in their early stages. To better elucidate the link between planet formation and disk substructures, observational biases should be…

[Abridge] In the first paper of this series (paper I) we presented a new approach for studying the chemo-odynamical evolution in disk galaxies, focusing on the Milky Way. Here we extend these results to different distances from the Galactic…

Astrophysics of Galaxies · Physics 2014-12-03 Ivan Minchev , Cristina Chiappini , Marie Martig

The gas present in planet-forming disks typically exhibits strong emission features of abundant carbon and oxygen molecular carriers. In some instances, protoplanetary disks show an elevated C/O ratio above interstellar values, which leads…

Earth and Planetary Astrophysics · Physics 2025-02-05 Eshan Raul , Felipe Alarcón , Edwin A. Bergin

The study of protoplanetary disc evolution and planet formation has mainly concentrated on solar (and low) mass stars since they host the majority of the confirmed exoplanets. Nevertheless, the numerous planets found orbiting stars up to…

Earth and Planetary Astrophysics · Physics 2023-11-08 María Paula Ronco , Matthias R. Schreiber , Eva Villaver , Octavio M. Guilera , Marcelo M. Miller Bertolami