Results 51 to 60 of about 42,848 (232)
Dust photophoretic transport around a T Tauri star: Implications for comets composition [PDF]
, 2016 There is a growing body of evidences for the presence of crystalline material in comets. These crystals are believed to have been annealed in the inner part of the proto-solar nebula, while comets should have been formed in the outer regions.
Cordier, D. +2 more
core +4 more sources
Modeling the Infrared Emission from the HR 4796A Disk [PDF]
, 2003 We model the spectral energy distribution (SED) from the mid-infrared to submillimeter of the ring-like disk of HR 4796A, the dustiest A-type star. We consider dust made either of coagulated but otherwise unaltered protostellar interstellar grains, or ...
Li, Aigen, Lunine, J. I.
core +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
Progress in Earth and Planetary Science, 2022 Enstatite chondrites are a small clan of meteorites, only ~ 1% out of all meteorite collection. However, they are the most reduced meteorites and have almost identical isotopic compositions to those of the Earth, suggestive of significant contributions ...
Yangting Lin
doaj +1 more source
Volatiles in protoplanetary disks [PDF]
, 2014 Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments. They consist of relatively small, often hydrogenated, molecules based on the abundant elements carbon ...
Bergin, Edwin A. +6 more
core +2 more sources
The Evolution of the Water Distribution in a Viscous Protoplanetary Disk
, 2005 (Abridged) Astronomical observations have shown that protoplanetary disks are dynamic objects through which mass is transported and accreted by the central star.
Ciesla, Fred J., Cuzzi, Jeffrey N.
core +2 more sources
Mid-infrared spectroscopy of protoplanetary and planetary nebulae [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We present medium-resolution (R ∼600), mid-infrared (7.5-14 μm) spectra of 15 young planetary nebulae. Linestrengths for observed forbidden transitions are presented, and numerous broad emission features from silicates, polyaromatic hydrocarbons (PAHs) and silicon carbide (SiC) are observed.
S. A. Rinehart +3 more
openaire +1 more source
Planetesimal Compositions in Exoplanet Systems [PDF]
, 2012 We have used recent surveys of the composition of exoplanet host stars to investigate the expected composition of condensed material in planetesimals formed beyond the snow line in the circumstellar nebulae of these systems.
Bockelée-Morvan +26 more
core +3 more sources
A REMODEL OF THE ENVELOPE AROUND THE 21 μm PROTOPLANETARY NEBULA IRAS 07134+1005 [PDF]
, 2011 Recently, the CO J = 3–2 observational result of the envelope of the 21 μm protoplanetary nebula (PPN) IRAS 07134+1005 has been reported. Assuming that the CO J = 3–2 line was optically thin, the mass-loss rate of the superwind in this PPN was found to ...
ChunYi Yang, Chin-Fei Lee
semanticscholar +1 more source
New Paradigms For Asteroid Formation
, 2015 Asteroids and meteorites provide key evidence on the formation of planetesimals in the Solar System. Asteroids are traditionally thought to form in a bottom-up process by coagulation within a population of initially km-scale planetesimals.
Cuzzi, Jeffrey N. +4 more
core +1 more source