Self-gravitating spiral waves can concentrate a realistic multi-size dust population enough to collapse into bound planetary cores when the dust-to-gas ratio is about 0.01 and grains reach Stokes numbers near unity.
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Dust density enhancements and the direct formation of planetary cores in gravitationally unstable discs
Self-gravitating spiral waves can concentrate a realistic multi-size dust population enough to collapse into bound planetary cores when the dust-to-gas ratio is about 0.01 and grains reach Stokes numbers near unity.