Results 101 to 110 of about 16,676 (207)

The Carbon Isotopic Ratio and Planet Formation

The Astrophysical Journal
We present the first detection of ^13 CCH in a protoplanetary disk (TW Hya). Using observations of C _2 H, we measure CCH/ ^13 CCH = 65 ± 20 gas with a CO isotopic ratio of ^12 CO/ ^13 CO = 21 ± 5.
Edwin A. Bergin, Arthur Bosman, Richard Teague, Jenny Calahan, Karen Willacy, L. Ilsedore Cleeves, Kamber Schwarz, Ke Zhang, Simon Bruderer   +8 more
doaj   +1 more source

Breathing Life Into Dead-Zones

EPJ Web of Conferences, 2013
The terrestrial planet formation regions of protoplanetary disks are generally sufficiently cold to be con- sidered non-magnetized and, consequently, dynamically inactive.
Gressel Oliver, Nelson Richard P., Umurhan Orkan M.   +2 more
doaj   +1 more source

Dust Evolution in Protoplanetary Disks

Submitted version, to be published in: Handbook of Exoplanets, 2nd Edition, Hans Deeg and Juan Antonio Belmonte (Eds. in Chief), Springer International Publishing AG, part of Springer Nature. Comments welcome.
van der Marel, Nienke, Pinilla, Paola
openaire   +2 more sources

exoALMA XXII: A Two-dimensional Atlas of Deviations from Keplerian Disks

The Astrophysical Journal Letters
Protoplanetary disks are the birthplaces of planetary systems, and deviations from Keplerian rotation imprinted in disk gas kinematics serve as key tracers of physical processes and the presence of protoplanets within disks.
Misato Fukagawa, Andrés F. Izquierdo, Jochen Stadler, Lisa Wölfer, Maria Galloway-Sprietsma, Ryuta Orihara, Masataka Aizawa, Munetake Momose, Daniele Fasano, Myriam Benisty, Richard Teague, Stefano Facchini, Christophe Pinte, Sean M. Andrews, Jaehan Bae, Marcelo Barraza-Alfaro, Gianni Cataldi, Pietro Curone, Ian Czekala, Mario Flock, Himanshi Garg, Cassandra Hall, Jane Huang, John D. Ilee, Jensen Lawrence, Geoffroy Lesur, Giuseppe Lodato, Cristiano Longarini, Ryan A. Loomis, François Ménard, Daniel J. Price, Giovanni Rosotti, Hsi-Wei Yen, Tomohiro C. Yoshida, Gaylor Wafflard-Fernandez, David J. Wilner, Andrew J. Winter, Brianna Zawadzki   +37 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

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

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

JWST Imaging of Edge-on Protoplanetary Disks. II. Appearance of Edge-on Disks with a Tilted Inner Region: Case Study of IRAS04302+2247

The Astrophysical Journal
We present James Webb Space Telescope imaging from 2 to 21 μ m of the edge-on protoplanetary disk around the embedded young star IRAS04302+2247. The structure of the source shows two reflection nebulae separated by a dark lane.
Marion Villenave, Karl R. Stapelfeldt, Gaspard Duchêne, François Ménard, Schuyler G. Wolff, Marshall D. Perrin, Christophe Pinte, Ryo Tazaki, Deborah L. Padgett   +8 more
doaj   +1 more source

Substructure in externally irradiated protoplanetary disks

Astronomy & Astrophysics
It is known that the external irradiation of protoplanetary disks by nearby massive stars can result in mass loss that impacts the disk evolution, however the dynamical impact of external irradiation upon the disk itself has not been explored in detail ...
Ziampras Alexandros, Qiao Lin, Haworth Thomas J.   +2 more
doaj   +1 more source

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