192 citations · 1k across the 33 of their papers we have counts for
18 papers · 1 filter
Dust concentration and chondrule formation
Alexander Hubbard, Mordecai-Mark Mac Low, Denton S. Ebel
Meteoritical and astrophysical models of planet formation make contradictory predictions for dust concentration factors in chondrule forming regions of the solar nebula. Meteoritic…
Making Terrestrial Planets: High Temperatures, FU Orionis Outbursts, Earth, and Planetary System Architectures
Alexander Hubbard
Current protoplanetary dust coagulation theory does not predict dry silicate planetesimals, in tension with the Earth. While remedies to this predicament have been proposed, they h…
FU Orionis outbursts, preferential recondensation of water ice, and the formation of giant planets
Alexander Hubbard
Ices, including water ice, prefer to recondense onto pre-existing nuclei rather than spontaneously forming grains from a cloud of vapor. Interestingly, different potential reconden…
Generating potassium abundance variations in the Solar Nebula
Alexander Hubbard
An intriguing aspect of chondritic meteorites is that they are complementary: while their separate components have wildly varying abundances, bulk chondrites have nearly solar comp…
Partitioning tungsten between matrix precursors and chondrule precursors through relative settling
Alexander Hubbard
Recent studies of chondrites have found a tungsten isotopic anomaly between chondrules and matrix. Given the refractory nature of tungsten, this implies that W was carried into the…
Ferromagnetism and particle collisions: applications to protoplanetary disks and the meteoritical record
Alexander Hubbard
The meteoritical record shows both iron partitioning and tungsten isotopic partitioning between matrix and chondrules. Tungsten is not abundant enough to have driven its own isotop…