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Observationally, its abundance and distribution is however just beginning to be understood in low-mass prestellar and cluster-forming cores. In high mass star forming regions, H2D+ has been detected only in two cores, and its spatial distribution remains unknown. Here we present the first map of the 372 GHz ortho-H2D+ and N2H+ 4-3 transition in the DR21 filament of Cygnus-X with the JCMT, and N2D+ 3--2 and dust con"},"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":"1204.0784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-04-03T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"83a89b41e4dfd86e5c22cac49d74fb2a2f9097af185a8ff751a9a0b6ebac9bdc","abstract_canon_sha256":"3391a90c790e3239fde72d60fd5ea4fde969e0509fe56849a15446c522390bcc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:57.504573Z","signature_b64":"PALlLSQDB1r8MbZb6KikaQmqqqT8bHLNEkIo9t0hfH0yLq7I4Buu3tR4ssiW7ZBYsXw8jDYMJgOd7C2etNPJAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bc014cc7f5d99840a9db6fc8dc8e6bc184f1742cedbb892064f0877d966381f3","last_reissued_at":"2026-05-18T01:57:57.503995Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:57.503995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"H2D+ in the high mass star-forming Region Cygnus-X","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Darek Lis (Caltech), Jens Kauffmann (JPL), Mark Thompson (Hertfordshire), Paola Caselli (Leeds), Qizhou Zhang (CfA), Thushara Pillai (Caltech)","submitted_at":"2012-04-03T20:00:00Z","abstract_excerpt":"H2D+ is a primary ion which dominates the gas-phase chemistry of cold dense gas. 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