Results 1 to 10 of about 19,935 (257)
Herschel evidence for disk flattening or gas depletion in transitional disks [PDF]
EAS Publications Series, 2014 Transitional disks are protoplanetary disks characterized by reduced near- and mid-infrared emission with respect to full disks. This characteristic spectral energy distribution indicates the presence of an optically thin inner cavity within the dust ...
Andrews, S. +8 more
core +16 more sources
Volatiles in protoplanetary disks [PDF]
, 2014 Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments. They consist of relatively small, often hydrogenated, molecules based on the abundant elements carbon ...
Bergin, Edwin A. +6 more
core +6 more sources
On the ionisation fraction in protoplanetary disks [PDF]
, 2005 We calculate the ionisation fraction in protostellar disk models using two different gas-phase chemical networks, and examine the effect of turbulent mixing by modelling the diffusion of chemical species vertically through the disk.
M. Ilgner, Richard P. Nelson
core +8 more sources
Finding Substructures in Protostellar Disks in Ophiuchus
The Astronomical Journal, 2023 High-resolution, millimeter observations of disks at the protoplanetary stage reveal substructures such as gaps, rings, arcs, spirals, and cavities. While many protoplanetary disks host such substructures, only a few at the younger protostellar stage ...
Arnaud Michel +7 more
doaj +1 more source
Demographics of Protoplanetary Disks: A Simulated Population of Edge-on Systems
The Astrophysical Journal, 2023 The structure of protoplanetary disks plays an essential role in planet formation. A disk that is highly inclined, or “edge-on,” is of particular interest since its geometry provides a unique opportunity to study the disk’s vertical structure and radial ...
Isabel Angelo +11 more
doaj +1 more source
A numerical approach to model chemistry of complex organic molecules in a protoplanetary disk
Open Astronomy, 2022 Multiphase astrochemical modeling presents a numerical challenge especially for the simulation of objects with the wide range of physical parameters such as protoplanetary disks.
Kiskin Mikhail Yu. +2 more
doaj +1 more source
Kinematic Evidence of an Embedded Protoplanet in HD 142666 Identified by Machine Learning
The Astrophysical Journal, 2023 Observations of protoplanetary disks have shown that forming exoplanets leave characteristic imprints on the gas and dust of the disk. In the gas, these forming exoplanets cause deviations from Keplerian motion, which can be detected through molecular ...
J. P. Terry +3 more
doaj +1 more source
On the Evolution of Dust Mineralogy, From Protoplanetary Disks to Planetary Systems [PDF]
, 2011 Mineralogical studies of silicate features emitted by dust grains in protoplanetary disks and Solar System bodies can shed light on the progress of planet formation.
Beckwith +55 more
core +3 more sources
Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution
The Astrophysical Journal, 2023 Typical accretion disks around massive protostars are hot enough for water ice to sublimate. We here propose to utilize the massive protostellar disks for investigating the collisional evolution of silicate grains with no ice mantle, which is an ...
Ryota Yamamuro +2 more
doaj +1 more source
Gas line observations of disks*
EPJ Web of Conferences, 2015 Gas represents the bulk of the mass content in protoplanetary disks. It is therefore observations of gas that can provide important information of physical structure and chemical evolution of disks.
Dionatos Odysseas
doaj +1 more source