Results 61 to 70 of about 400,542 (301)
Temperature Structure in the Inner Regions of Protoplanetary Disks: Inefficient Accretion Heating Controlled by Nonideal Magnetohydrodynamics [PDF]
Astrophysical Journal, 2019 The gas temperature in protoplanetary disks (PPDs) is determined by a combination of irradiation heating and accretion heating, with the latter conventionally attributed to turbulent dissipation. However, recent studies have suggested that the inner disk
S. Mori, X. Bai, S. Okuzumi
semanticscholar +1 more source
PROTOPLANETARY DISK STRUCTURES IN OPHIUCHUS [PDF]
The Astrophysical Journal, 2009 ApJ in press: 51 pages, 13 ...
Andrews, Sean M. +4 more
openaire +2 more sources
Centimeter-sized Grains in the Compact Dust Ring around Very-low-mass Star CIDA 1
The Astronomical Journal, 2023 We examined the grain size in the dust ring encircling the 0.19 M _☉ T Tauri star CIDA 1 using the Karl G. Jansky Very Large Array at multiple centimeter wavelengths, with a spatial resolution of 0.″2–0.″9. We detected distinct partial-ring structures at
Jun Hashimoto +5 more
doaj +1 more source
Self-Sustained Ionization and Vanishing Dead Zones in Protoplanetary Disks
, 2005 We analyze the ionization state of the magnetohydrodynamically turbulent protoplanetary disks and propose a new mechanism of sustaining ionization. First, we show that in the quasi-steady state of turbulence driven by magnetorotational instability in a ...
Inutsuka, Shu-ichiro, Sano, Takayoshi
core +1 more source
The Astrophysical Journal, 2023 Using self-consistent models of turbulent particle growth in an evolving protoplanetary nebula of solar composition, we find that recently proposed local metallicity and Stokes number criteria necessary for the streaming instability to generate ...
Paul R. Estrada, Orkan M. Umurhan
doaj +1 more source
On the Planetary Interpretation of Multiple Gaps and Rings in Protoplanetary Disks Seen By ALMA [PDF]
Astrophysical Journal, 2019 It has been recently suggested that the multiple concentric rings and gaps discovered by ALMA in many protoplanetary disks may be produced by a single planet, as a result of the complex propagation and dissipation of the multiple spiral density waves it ...
Ryan Miranda, R. Rafikov
semanticscholar +1 more source
Heat Transfer, Volume 55, Issue 1, Page 764-774, January 2026.ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey +3 more
wiley +1 more source
Vortices in Protoplanetary Disks [PDF]
The Astrophysical Journal, 1999 We use a high order accuracy spectral code to carry out two-dimensional time-dependent numerical simulations of vortices in accretion disks. In particular, we examine the stability and the life time of vortices in circumstellar disks around young stellar objects. The results show that cyclonic vortices dissipate quickly, while anticyclonic vortices can
Godon, Patrick., Livio, Mario.
openaire +2 more sources
Scaling Relations Associated with Millimeter Continuum Sizes in Protoplanetary Disks [PDF]
Astrophysical Journal, 2018 We present a combined, homogenized analysis of archival Submillimeter Array (SMA) and Atacama Large Millimeter/submillimeter Array (ALMA) observations of the spatially resolved 340 GHz (870 μm) continuum emission from 105 nearby protoplanetary disks ...
S. Andrews +5 more
semanticscholar +1 more source
Formation of Asteroid (16) Psyche by a Giant Impact
Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.Abstract Asteroid (16) Psyche is the largest likely metal‐rich asteroid in the Solar System and the target of the NASA Psyche mission. The mission aims to determine whether the asteroid is the core of a differentiated planetesimal that lost its mantle via a giant impact.
Saverio Cambioni +14 more
wiley +1 more source