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4 results for “planet formation”
Imprint of planet formation in the deep interior of the Sun
<p>In protoplanetary disks, the growth and inward drift of dust lead to the generation of a temporal ``pebble wave'' of increased metallicity. This phase must be followed by a phase in which the exhaustion of the pebbles in the disk and the formation of planets lead to the accretion of metal-poor gas. At the same time, disk winds may lead to the selective removal of hydrogen and helium from the disk. Hence, stars grow by accreting gas that has an evolving composition. In this work, we investigated how the formation of the Solar System may have affected the composition and structure of the Sun, and whether it plays any role in solving the so-called solar abundance problem, that is, the fact that standard models with up-to-date lower-metallicity abundances reproduce helioseismic constraints significantly more poorly than those with old higher-metallicity abundances. We simulated the evolution of the Sun from the protostellar phase to the present age and attempted to reproduce spectroscopic and helioseismic constraints. We performed chi-squared tests to optimize our input parameters, which we extended by adding secondary parameters. These additional parameters accounted for the variations in the composition of the accreted material and an increase in the opacities. We confirmed that, for realistic models, planet formation occurs when the solar convective zone is still massive; thus, the overall changes due to planet formation are too small to significantly improve the chi-square fits. We found that solar models with up-to-date abundances require an opacity increase of 12% to 18% centered at T = 10^6.4 K to reproduce the available observational constraints. This is slightly higher than, but is qualitatively in good agreement with, recent measurements of higher iron opacities. These models result in better fits to the observations than those using old abundances; therefore, they are a promising solution to the solar abundance problem. Using these improved models, we found that planet formation processes leave a small imprint in the solar core, whose metallicity is enhanced by up to 5%. This result can be tested by accurately measuring the solar neutrino flux. In the improved models, the protosolar molecular cloud core is characterized by a primordial metallicity in the range Zproto = 0.0127-0.0157 and a helium mass fraction in the range Yproto = 0.268-0.274.</p>
The datasets for the paper "The long-lived and recent seismicity at the lunar Orientale basin: Evidence from morphology and formation ages of boulder avalanches, tectonics and seismic ground motion" JGR: Planets (e2020JE006553)
<p>The datasets contain supporting files for the paper:</p> <p>Mohanty, R., Kumar, P.S., Raghukanth, S.T.G., & Lakshmi, K.J.P., (2020). The long-lived and recent seismicity at the lunar Orientale basin: Evidence from morphology and formation ages of boulder avalanches, tectonics and seismic ground motion, JGR: Planets, e2020JE006553.</p>
Dust rings as a footprint of planet formation in a protoplanetary disk
<p>Simulation outputs of "Dust rings as a footprint of planet formation in a protoplanetary disk".</p> <p>average_output*.dat: azimuthally averaged surface density of gas</p> <p>average_output_dust0*.dat azimuthally averaged surface density of dust grains</p> <p>output*.dat: 2D data for gas</p> <p>output_dust0*.dat: 2D data for dust grains</p> <p>The number of the file indicates the time of output (10xnumber orbit)</p> <p>Regarding to planet0.dat and orbit0.dat, please see http://fargo.in2p3.fr/Output</p>
The dataset for the paper "Long-Lived and Continual Volcanic Eruptions, Tectonic Activity, Pit Chains Formation and Boulder Avalanches in Northern Tharsis Region: Implications for Late Amazonian Geodynamics and Seismo-Tectonic Processes on Mars" JGR: Planets.
<p>This dataset pertains to the following paper in Journal of Geophysical Research: Planets.</p> <p>Krishnan, V., and Kumar, P.S. (2022), Long-Lived and Continual Volcanic Eruptions, Tectonic Activity, Pit Chains Formation and Boulder Avalanches in Northern Tharsis Region: Implications for Late Amazonian Geodynamics and Seismo-Tectonic Processes on Mars, Journal of Geophysical Research: Planets (for full citation, please see the journal). AGU Manuscript No. 2022JE007511.</p> <p> </p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.