{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2005:DSPAZL43V4P3DOE7CH3RNHSJ5Y","short_pith_number":"pith:DSPAZL43","schema_version":"1.0","canonical_sha256":"1c9e0caf9baf1fb1b89f11f7169e49ee33f0d35fdd3134cecf8c38cd0a3824ed","source":{"kind":"arxiv","id":"astro-ph/0504230","version":1},"attestation_state":"computed","paper":{"title":"Morphologies of Ultracompact HII Regions in W49A and Sgr B2: Prevalence of Shells and a Modified Classification Scheme","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. Mercer, C. G. De Pree, D. J. Wilner, J. Deblasio, L. E. Davis","submitted_at":"2005-04-10T14:20:42Z","abstract_excerpt":"We have used Very Large Array (VLA) observations of the massive star forming regions W49A and Sgr B2, obtained with resolutions from 2\\farcs0 to 0\\farcs04, to classify the morphologies of nearly 100 ultracompact HII regions. These high resolution, multi-frequency, multi-configuration VLA observations motivate several modifications of the existing morphological classification scheme for UC HII regions. In this work, we describe the modified morphology scheme and the criteria used in source classification. In particular, we drop the ``core-halo'' classification, add a ``bipolar'' classification,"},"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":"astro-ph/0504230","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-10T14:20:42Z","cross_cats_sorted":[],"title_canon_sha256":"74163569dbddb906b1eca44f2b3bedc0253733c491a4cd6d50fc892e9fb4ae15","abstract_canon_sha256":"4dfba58adb2995cb80eedc3050ff667634dda1beb7ff7dbb2d570d84e3f27728"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:52:09.753479Z","signature_b64":"OX5tsCz7zkhp2V9cWYmVqf2GPsXRrHkQToWQCOI4A7FBOCQQR8EPRY/VRBDQTHZvNrjqdKgFTuTSNvCsM+YxDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c9e0caf9baf1fb1b89f11f7169e49ee33f0d35fdd3134cecf8c38cd0a3824ed","last_reissued_at":"2026-07-04T16:52:09.753099Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:52:09.753099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Morphologies of Ultracompact HII Regions in W49A and Sgr B2: Prevalence of Shells and a Modified Classification Scheme","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. Mercer, C. G. De Pree, D. J. Wilner, J. Deblasio, L. E. Davis","submitted_at":"2005-04-10T14:20:42Z","abstract_excerpt":"We have used Very Large Array (VLA) observations of the massive star forming regions W49A and Sgr B2, obtained with resolutions from 2\\farcs0 to 0\\farcs04, to classify the morphologies of nearly 100 ultracompact HII regions. These high resolution, multi-frequency, multi-configuration VLA observations motivate several modifications of the existing morphological classification scheme for UC HII regions. In this work, we describe the modified morphology scheme and the criteria used in source classification. In particular, we drop the ``core-halo'' classification, add a ``bipolar'' classification,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504230","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0504230/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504230","created_at":"2026-07-04T16:52:09.753161+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504230v1","created_at":"2026-07-04T16:52:09.753161+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504230","created_at":"2026-07-04T16:52:09.753161+00:00"},{"alias_kind":"pith_short_12","alias_value":"DSPAZL43V4P3","created_at":"2026-07-04T16:52:09.753161+00:00"},{"alias_kind":"pith_short_16","alias_value":"DSPAZL43V4P3DOE7","created_at":"2026-07-04T16:52:09.753161+00:00"},{"alias_kind":"pith_short_8","alias_value":"DSPAZL43","created_at":"2026-07-04T16:52:09.753161+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y","json":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y.json","graph_json":"https://pith.science/api/pith-number/DSPAZL43V4P3DOE7CH3RNHSJ5Y/graph.json","events_json":"https://pith.science/api/pith-number/DSPAZL43V4P3DOE7CH3RNHSJ5Y/events.json","paper":"https://pith.science/paper/DSPAZL43"},"agent_actions":{"view_html":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y","download_json":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y.json","view_paper":"https://pith.science/paper/DSPAZL43","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0504230&json=true","fetch_graph":"https://pith.science/api/pith-number/DSPAZL43V4P3DOE7CH3RNHSJ5Y/graph.json","fetch_events":"https://pith.science/api/pith-number/DSPAZL43V4P3DOE7CH3RNHSJ5Y/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y/action/storage_attestation","attest_author":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y/action/author_attestation","sign_citation":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y/action/citation_signature","submit_replication":"https://pith.science/pith/DSPAZL43V4P3DOE7CH3RNHSJ5Y/action/replication_record"}},"created_at":"2026-07-04T16:52:09.753161+00:00","updated_at":"2026-07-04T16:52:09.753161+00:00"}