Results 31 to 40 of about 15,098 (153)
Probing the Protosolar Disk Using Dust Filtering at Gaps in the Early Solar System
, 2019 Jupiter and Saturn formed early, before the gas disk dispersed. The presence of gap-opening planets affects the dynamics of the gas and embedded solids and halts the inward drift of grains above a certain size.
Benítez-Llambay, Pablo +6 more
core +1 more source
From stellar nebula to planetesimals [PDF]
, 2014 Solar and extrasolar comets and extrasolar planets are the subject of numerous studies in order to determine their chemical composition and internal structure.
Alibert, Yann +4 more
core +2 more sources
Indigenous Futurities: Theorizing Futurity in the Past and Present
American Anthropologist, EarlyView.ABSTRACT Over the past 20 years, a growing number of activists, scholars, writers, and visual artists have engaged with futurism as a framework for representing the lives of Indigenous peoples. Inspired by this hopeful reframing of the past‐present‐future, contributions to this special section of American Anthropologist address the question: How can ...
Lindsay Martel Montgomery +1 more
wiley +1 more source
Composition of Massive Giant Planets [PDF]
, 2010 The two current models for giant planet formation are core accretion and disk instability. We discuss the core masses and overall planetary enrichment in heavy elements predicted by the two formation models, and show that both models could lead to a ...
Durisen +5 more
core +1 more source
The Material Basis of 18th‐Century Meissen Porcelain
Archaeometry, EarlyView.ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley +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
Searching for the signatures of terrestrial planets in F-, G-type main-sequence stars
, 2013 We have studied the volatile-to-refractory abundance ratios to investigate their possible relation with the low-mass planetary formation. We present a fully differential chemical abundance analysis using high-quality HARPS and UVES spectra of 61 late F ...
Adibekyan, V. Zh. +6 more
core +2 more sources
Geostandards and Geoanalytical Research, EarlyView.Key Points Low‐Mg calcite RM developed for in situ microanalysis applications in palaeoclimatology (δ18O, δ13C; Mg, Sr m/m). New data for calcite CRM IAEA‐603 (δ18O, δ13C by SIMS and GS‐IRMS; Mg m/m). No detectable IMF effect of Mg on SIMS δ18O determinations for mass fractions < 3650 μg g‐1.
Andreas T. Hertwig +13 more
wiley +1 more source
Sublimation Temperature of Circumstellar Dust Particles and Its Importance for Dust Ring Formation [PDF]
, 2011 Dust particles in orbit around a star drift toward the central star by the Poynting-Robertson effect and pile up by sublimation. We analytically derive the pile-up magnitude, adopting a simple model for optical cross sections.
Kimura, Hiroshi +4 more
core +2 more sources
Noble gases and nitrogen in material from asteroid Bennu
Meteoritics &Planetary Science, EarlyView.Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty +7 more
wiley +1 more source