Results 31 to 40 of about 425,590 (288)
The Astrophysical Journal, 2023 We present a three-dimensional, time-dependent MHD simulation of the short-term interaction between a protoplanetary disk and the stellar corona in a T Tauri system.
Ofer Cohen +6 more
doaj +1 more source
The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks [PDF]
Astrophysical Journal, 2018 A large fraction of the protoplanetary disks observed with ALMA display multiple well-defined and nearly perfectly circular rings in the continuum, in many cases with substantial peak-to-valley contrast.
C. Dullemond +14 more
semanticscholar +1 more source
Contacts of Water Ice in Protoplanetary Disks—Laboratory Experiments [PDF]
Astrophysical Journal, 2019 Water ice is abundant in protoplanetary disks. Its sticking properties are therefore important during phases of collisional growth. In this work, we study the sticking and rolling of 1.1 mm ice grains at different temperatures.
G. Musiolik, G. Wurm
semanticscholar +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
ALMA Survey of Lupus Protoplanetary Disks. II. Gas Disk Radii [PDF]
, 2018 We present Atacama Large Millimeter/Sub-Millimeter Array (ALMA) Band 6 observations of a complete sample of protoplanetary disks in the young (∼1–3 Myr) Lupus star-forming region, covering the 1.33 mm continuum and the 12CO, 13CO, and C18O J = 2–1 lines.
M. Ansdell +12 more
semanticscholar +1 more source
Why do protoplanetary disks appear not massive enough to form the known exoplanet population? [PDF]
Astronomy & Astrophysics, 2018 When and how planets form in protoplanetary disks is still a topic of discussion. Exoplanet detection surveys and protoplanetary disk surveys are now providing results that are leading to new insights.
C. Manara +4 more
semanticscholar +1 more source
Systematic Variations of CO Gas Abundance with Radius in Gas-rich Protoplanetary Disks [PDF]
Astrophysical Journal, 2019 CO is the most widely used gas tracer of protoplanetary disks. Its abundance is usually assumed to be an interstellar ratio throughout the warm molecular layer of the disk.
Ke Zhang +4 more
semanticscholar +1 more source
Photoevaporation of Protoplanetary Disks [PDF]
The Astrophysical Journal, 2008 We present HST/NICMOS Paschen alpha images and low and high resolution IRS spectra of photoevaporating disk-tail systems originally detected at 24 micron near O stars. We find no Paschen alpha emission in any of the systems. The resulting upper limits correspond to about 0.000002-0.000003 solar mass of mass in hydrogen in the tails suggesting that the ...
George H. Rieke +7 more
openaire +3 more sources
Streaming Instability in Turbulent Protoplanetary Disks [PDF]
Astrophysical Journal, 2019 The streaming instability for solid particles in protoplanetary disks is reexamined assuming the familiar alpha (α) model for isotropic turbulence. Turbulence always reduces the growth rates of the streaming instability relative to values calculated for ...
O. Umurhan, P. Estrada, J. Cuzzi
semanticscholar +1 more source
Protoplanetary Disks as (Possibly) Viscous Disks [PDF]
The Astrophysical Journal, 2017 Abstract Protoplanetary disks are believed to evolve on megayear 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 measured (dust-based) masses and stellar accretion rates to derive the dimensionless α ...
Roman R. Rafikov, Roman R. Rafikov
openaire +3 more sources