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However, observations show that many disks are structured in rings that may be due to pressure maxima, preventing the global radial drift of the dust.\n  Aims: We study how the pebble-accretion paradigm changes if the dust is confined in a ring.\n  Results: Planet Type-I migration is stopped in a ring, but"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2004.04942","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-10T08:21:25Z","cross_cats_sorted":[],"title_canon_sha256":"dae07aefda1365070eaf01ac40f79bcf20adc80b768feee275abfca01cd1f326","abstract_canon_sha256":"bea30cd8e228034676602cca6d08d6884fb7e297c72a5c41ae31a7f506fd5ab4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:15:16.092435Z","signature_b64":"oxXMEpvWZ04ivFU7CoLxC3TyvO0Jp+c3G6Z9Qc2Gn7K0wgiYXAeNWNdeOdKkWTeNpS8TIEODq0Nt85ZwkTT8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"045a1ff0eb32bdb090b3af3e1ba81d7e89d37a5692c22866d2dd749c691bf38a","last_reissued_at":"2026-07-05T01:15:16.091991Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:15:16.091991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Planet formation by pebble accretion in ringed disks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Alessandro Morbidelli","submitted_at":"2020-04-10T08:21:25Z","abstract_excerpt":"Context: Pebble accretion is expected to be the dominant process for the formation of massive solid planets, such as the cores of giant planets and super-Earths. 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