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The aim of this paper is to study deuterated water in the solar-type protostars NGC1333 IRAS4A and IRAS4B, to compare their HDO abundance distribution with other star-forming regions, and to constrain their HDO/H2O ratios. Methods. Using the Herschel/HIFI instrument as well as ground-based telescopes, we observed several HDO lines covering a large excitation range (Eup/k=22-168 K) towards these protostars and an outflow position. Non-LTE radiative transfer codes were then used to determine the HDO abundance profiles in these sources. Results. The HDO fundamental line profiles show a very"},"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":"1310.7365","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-28T10:29:56Z","cross_cats_sorted":[],"title_canon_sha256":"a5c784a7db7e0348440ddf46c7da0c22631778595e1908d22cfb4068ede6d5e4","abstract_canon_sha256":"31c5976e93e453b67215f6eda66a51f77e4cf0c953b4c18361fe8f30d3fef489"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:48.777912Z","signature_b64":"xeL8mc49fiIdl8X1ZTcHMDZiSXtykOw1sRGRBsIAP2++4Oqh6joankwXs1CHYTsUQYfzmBXiJk5NWgM7bC5+Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"afded7819b290b34ecb7c886c6a860bca18be9f2bfd221323a26cf43dd09ccbf","last_reissued_at":"2026-05-18T01:46:48.777444Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:48.777444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. 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