Results 11 to 20 of about 400,542 (301)
Photoprocesses in protoplanetary disks [PDF]
Faraday Discussions, 2006 Circumstellar disks are exposed to intense ultraviolet radiation from the young star. In the inner disks, the UV radiation can be enhanced by more than seven orders of magnitude compared with the average interstellar field, resulting in a physical and ...
Aikawa +81 more
core +3 more sources
Silica in Protoplanetary Disks [PDF]
The Astrophysical Journal, 2008 Mid-infrared spectra of a few T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope show prominent narrow emission features indicating silica (crystalline silicon dioxide).
A. Li +82 more
core +2 more sources
Dust in protoplanetary disks: observations* [PDF]
EPJ Web of Conferences, 2015 Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may ...
Waters L.B.F.M.
doaj +2 more sources
An ALMA Survey of Protoplanetary Disks in the $\sigma$ Orionis Cluster [PDF]
, 2017 The $\sigma$ Orionis cluster is important for studying protoplanetary disk evolution, as its intermediate age ($\sim$3-5 Myr) is comparable to the median disk lifetime. We use ALMA to conduct a high-sensitivity survey of dust and gas in 92 protoplanetary
Ansdell, Megan +7 more
core +5 more sources
Resonant relaxation in protoplanetary disks [PDF]
The Astronomical Journal, 1998 Resonant relaxation is a novel form of two-body relaxation that arises in nearly Keplerian disks such as protoplanetary disks. Resonant relaxation does not affect the semimajor axes of the particles, but enhances relaxation of particle eccentricities and
Tremaine, Scott
core +5 more sources
Vortex migration in protoplanetary disks [PDF]
The Astrophysical Journal, 2010 We consider the radial migration of vortices in two-dimensional isothermal gaseous disks. We find that a vortex core, orbiting at the local gas velocity, induces velocity perturbations that propagate away from the vortex as density waves.
Abramowitz +19 more
core +8 more sources
Dust Growth and Evolution in Protoplanetary Disks [PDF]
Annual Review of Astronomy and Astrophysics, 2023 Over the past decade, advancement of observational capabilities, specifically the Atacama Large Millimeter/submillimeter Array (ALMA) and Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instruments, alongside theoretical innovations like ...
T. Birnstiel
semanticscholar +1 more source
Directly tracing the vertical stratification of molecules in protoplanetary disks [PDF]
Astronomy & Astrophysics, 2022 We aim to directly trace the vertical location of the emitting surface of multiple molecular tracers in protoplanetary disks. Our sample of disks includes Elias 2-27, WaOph 6 and the sources targeted by the MAPS ALMA Large Program.
T. Paneque-Carreño +5 more
semanticscholar +1 more source
Molecules with ALMA at Planet-forming Scales (MAPS). II. CLEAN Strategies for Synthesizing Images of Molecular Line Emission in Protoplanetary Disks [PDF]
Astrophysical Journal Supplement Series, 2021 The Molecules with ALMA at Planet-forming Scales Large Program (MAPS LP) surveyed the chemical structures of five protoplanetary disks across more than 40 different spectral lines at high angular resolution (0.″15 and 0.″30 beams for Bands 6 and 3 ...
I. Czekala +29 more
semanticscholar +1 more source
DustPy: A Python Package for Dust Evolution in Protoplanetary Disks [PDF]
Astrophysical Journal, 2022 Many processes during the evolution of protoplanetary disks and during planet formation are highly sensitive to the sizes of dust particles that are present in the disk: the efficiency of dust accretion in the disk and volatile transport on dust ...
S. Stammler, T. Birnstiel
semanticscholar +1 more source