Results 81 to 90 of about 19,742 (238)
Chemical Evolution of a Protoplanetary Disk [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractIn this paper we review recent progress in our understanding of the chemical evolution of protoplanetary disks. Current observational constraints and theoretical modeling on the chemical composition of gas and dust in these systems are presented.
openaire +4 more sources
Evidence for Magnetically‐Driven Accretion in the Distal Solar System
AGU Advances, Volume 5, Issue 6, December 2024.Abstract Paleomagnetic measurements of meteorites indicate that magnetic fields existed in the inner solar nebula capable of driving accretion at rates similar to those observed for young stellar objects with protoplanetary disks. However, the field strength in the solar system beyond ∼7 astronomical units (AU) and its role in accretion remain poorly ...
Elias N. Mansbach +11 more
wiley +1 more source
The effect of a planet on the dust distribution in a 3D protoplanetary disk [PDF]
, 2007 Aims: We investigate the behaviour of dust in protoplanetary disks under the action of gas drag in the presence of a planet. Our goal is twofold: to determine the spatial distribution of dust depending on grain size and planet mass, and therefore to ...
Fouchet, L. +3 more
core +3 more sources
Magma Ocean Evolution at Arbitrary Redox State
Journal of Geophysical Research: Planets, Volume 129, Issue 12, December 2024.Abstract Interactions between magma oceans and overlying atmospheres on young rocky planets leads to an evolving feedback of outgassing, greenhouse forcing, and mantle melt fraction. Previous studies have predominantly focused on the solidification of oxidized Earth‐similar planets, but the diversity in mean density and irradiation observed in the low ...
Harrison Nicholls +3 more
wiley +1 more source
, 2012 Many astrophysical systems of interest, including protoplanetary accretion disks, are made of turbu- lent magnetized gas with near solar metallicity. Thermal ionization of alkali metals in such gas exceeds non-thermal ionization when temperatures climb ...
Alexander Hubbard +30 more
core +1 more source
The Carbon Isotopic Ratio and Planet Formation
The Astrophysical JournalWe present the first detection of ^13 CCH in a protoplanetary disk (TW Hya). Using observations of C _2 H, we measure CCH/ ^13 CCH = 65 ± 20 gas with a CO isotopic ratio of ^12 CO/ ^13 CO = 21 ± 5.
Edwin A. Bergin +8 more
doaj +1 more source
Formation and evolution of the protoplanetary disk [PDF]
A disk formation model during collapse of the protosolar nebula, yielding a low-mass protoplanetary disk is presented. The following subject areas are covered: (1) circumstellar disks; (2) conditions for the formation of stars with disks; (3) early ...
Makalkin, A. B., Ruzmaikina, Tamara V.
core +1 more source
On Kinematic Measurements of Self-gravity in Protoplanetary Disks
The Astrophysical JournalUsing controlled injection and recovery experiments, we devised an analysis prescription to assess the quality of dynamical measurements of protoplanetary disk gas masses based on resolved (CO) spectral line data, given observational limitations ...
Sean M. Andrews +4 more
doaj +1 more source
Differences in elemental abundances between CI chondrites and the solar photosphere
Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3193-3214, December 2024.Abstract CI chondrites have been a proxy for the solar system since the mid‐20th century. The photospheric and CI chondrite abundances (P and CI, respectively) show a strong correlation. CI as a proxy is also justified by the (i) smoothness of their abundances plotted as a function of odd mass number and (ii) agreement within the error of P as ...
A. J. G. Jurewicz +3 more
wiley +1 more source
Breathing Life Into Dead-Zones
EPJ Web of Conferences, 2013 The terrestrial planet formation regions of protoplanetary disks are generally sufficiently cold to be con- sidered non-magnetized and, consequently, dynamically inactive.
Gressel Oliver +2 more
doaj +1 more source