Results 101 to 110 of about 5,108 (182)

Planet Formation Regulated by Galactic-scale Interstellar Turbulence

The Astrophysical Journal Letters
Planet formation occurs over a few Myr within protoplanetary disks of dust and gas, which are often assumed to evolve in isolation. However, extended gaseous structures have been uncovered around many protoplanetary disks, suggestive of late-stage infall
Andrew J. Winter, Myriam Benisty, Sean M. Andrews   +2 more
doaj   +1 more source

Shadow-induced Warps in Protoplanetary Disks

The Astrophysical Journal Letters
Shadows are commonly observed in protoplanetary disks in near-infrared (NIR) and (sub)millimeter images, often cast by misaligned inner disks or other obscuring material.
Shangjia Zhang, Zhaohuan Zhu, Callum W. Fairbairn   +2 more
doaj   +1 more source

Gas in Protoplanetary and Debris Disks: Insights from UV Spectroscopy [PDF]

, 2008
Over the last two decades, observations of protoplanetary and debris disks have played an important role in the new field of extrasolar planetary studies.
Roberge, Aki
core  

Observability of Substructures in the Planet-forming Disk in the (Sub)centimeter Wavelength with SKA and ngVLA

The Astrophysical Journal
Current imaging observations of protoplanetary disks using the Atacama Large Millimeter/submillimeter Array (ALMA) primarily focus on the submillimeter wavelength, leaving a gap in effective observational approaches for centimeter-sized dust, which is ...
Yinhao Wu, Shang-Fei Liu, Haochang Jiang, Sergei Nayakshin   +3 more
doaj   +1 more source

A tension between dust and gas radii: The role of substructures and external photoevaporation in protoplanetary disks

Astronomy & Astrophysics
Context. Protoplanetary disk substructures are thought to play a crucial role in disk evolution and planet formation. Population studies of disks large-sample size surveys show that not only substructure, but also their rapid formation, are needed to ...
Delussu Luca, Anania Rossella, Birnstiel Tilman, Toci Claudia, Rosotti Giovanni, Stammler Sebastian Markus, Lau Tommy Chi Ho, Miotello Anna   +7 more
doaj   +1 more source

Substructures of Protoplanetary Disks Revealed with ALMA Radio Observations [PDF]

, 2016
Protoplanetary disks, the birth places of planets, are rotating disks of dust and gas surrounding still-forming stars. Studying the lifetime, mass, size, structure, and compositions of protoplanetary disks through observations at infrared or millimeter ...
Dong, Jiayin
core  

SO Emission in the Dynamically Perturbed Protoplanetary Disks around CQ Tau and MWC 758

The Astrophysical Journal
We report the serendipitous detection of the SO J _N  = 6 _5 –5 _4 (219.949 GHz) rotational transition in archival Atacama Large Millimeter/submillimeter Array observations of the spiral hosting protoplanetary disks around CQ Tau (with ≈4.9 σ ...
Francesco Zagaria, Haochang Jiang, Gianni Cataldi, Stefano Facchini, Myriam Benisty, Yuri Aikawa, Sean Andrews, Jaehan Bae, Marcelo Barraza-Alfaro, Pietro Curone, Ian Czekala, Daniele Fasano, Cassandra Hall, Iain Hammond, Jane Huang, John D. Ilee, Andrés F. Izquierdo, Jensen Lawrence, Giuseppe Lodato, François Ménard, Christophe Pinte, Giovanni P. Rosotti, Jochen Stadler, Richard Teague, Leonardo Testi, David Wilner, Andrew Winter, Tomohiro Yoshida   +27 more
doaj   +1 more source

On the Interpretation of Velocity Residuals in Protoplanetary Disks

The Astronomical Journal
We present a first-order analytical model for line-of-sight velocity residuals, defined as the difference between observed velocities and those predicted by a fiducial model, assuming a flared, nearly axisymmetric disk with the perturbations in disk ...
Masataka Aizawa, Ryuta Orihara
doaj   +1 more source

<i>Herschel</i> survey and modelling of externally-illuminated photoevaporating protoplanetary disks. [PDF]

Astron Astrophys, 2017
Champion J, Berné O, Vicente S, Kamp I, Le Petit F, Gusdorf A, Joblin C, Goicoechea JR.   +7 more
europepmc   +1 more source

exoALMA. XXI. The Morphology and Dynamics of Vertical Flows

The Astrophysical Journal Letters
Vertical gas flows—such as winds and meridional circulations—are natural outcomes of protoplanetary disk processes and play a critical role in the earliest stages of planet formation.
Myriam Benisty, Andrés F. Izquierdo, Jochen Stadler, Maria Galloway-Sprietsma, Stefano Facchini, Andrew J. Winter, Jaehan Bae, Misato Fukagawa, Richard Teague, Christophe Pinte, Sean M. Andrews, Marcelo Barraza-Alfaro, Gianni Cataldi, Pietro Curone, Ian Czekala, Daniele Fasano, Mario Flock, Himanshi Garg, Jane Huang, John D. Ilee, Kazuhiro Kanagawa, Jensen Lawrence, Geoffroy Lesur, Giuseppe Lodato, Cristiano Longarini, Ryan A. Loomis, François Ménard, Ryuta Orihara, Daniel J. Price, Giovanni Rosotti, Gaylor Wafflard-Fernandez, David J. Wilner, Lisa Wölfer, Hsi-Wei Yen, Tomohiro C. Yoshida, Brianna Zawadzki   +35 more
doaj   +1 more source