Results 41 to 50 of about 19,742 (238)
The Evolution of Protoplanetary Disk Edges [PDF]
The Astrophysical Journal, 2004 We investigate gap formation in gaseous protostellar disks by a planet in a circular orbit in the limit of low disk viscosity. This regime may be appropriate to an aging disk after the epoch of planet formation. We find that the distance of planet to the gap outer boundary can be between the location of the $m=2$ and $m=1$ outer Lindblad resonances ...
Varniere, P., Quillen, A.C., Frank, A.
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Protoplanetary gas disks in the far infrared
, 2009 The physical and chemical conditions in young protoplanetary disks set the boundary conditions for planet formation. Although the dust in disks is relatively easily detected as a far-IR photometric ``excess'' over the expected photospheric emission, much
Goicoechea, Javier R., Swinyard, Bruce
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Zooming in on the Formation of Protoplanetary Disks [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe use the adaptive mesh refinement code RAMSES to model the formation of protoplanetary disks in realistic star formation environments. The resolution scales over up to 29 powers of two (~ 9 orders of magnitude) covering a range from outer scales of 40 pc to inner scales of 0.015 AU. The accretion rate from a 1.5 solar mass envelope peaks near
Nordlund, Åke +4 more
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Meteoritics &Planetary Science, Volume 60, Issue 3, Page 464-483, March 2025.Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we describe a hydrous clast with a fine‐grained rim.
Martin R. Lee +3 more
wiley +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
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Dust Coagulation and Settling in Layered Protoplanetary Disks [PDF]
, 2006 Previous models of dust growth in protoplanetary disks considered either uniformly laminar or turbulent disks. This Letter explores how dust growth occurs in a layered protoplanetary disk in which the magnetorotational instability generates turbulence ...
Ciesla, Fred J.
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Dust amorphization in protoplanetary disks [PDF]
Astronomy & Astrophysics, 2009 accepted for publication by A& ...
Marc Audard +8 more
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Meteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier +4 more
wiley +1 more source
The effect of local optically thick regions in the long-wave emission of young circumstellar disks [PDF]
, 2012 Multi-wavelength observations of protoplanetary disks in the sub-millimeter continuum have measured spectral indices values which are significantly lower than what is found in the diffuse interstellar medium. Under the assumption that mm-wave emission of
Isella, A. +5 more
core +2 more sources
The Inner Regions of Protoplanetary Disks [PDF]
Annual Review of Astronomy and Astrophysics, 2010 To understand how planetary systems form in the dusty disks around pre-main-sequence stars, a detailed knowledge of the structure and evolution of these disks is required. Although this is reasonably well understood for the regions of the disk beyond about 1 AU, the structure of these disks inward of 1 AU remains a puzzle. This is partly because it is
Cornelis P. Dullemond, John D. Monnier
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