{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VFXNUAGKUBQGS5K5O7CCJNNS4M","short_pith_number":"pith:VFXNUAGK","canonical_record":{"source":{"id":"1704.01769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-06T10:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"12b8c48973af002bdacfceca1b20806ce33b27ebe8974152c5f3d16913a5bb99","abstract_canon_sha256":"2233cd538d57c91731d30849f5b8a543b8f37e00a11cfa1f4316091e27471699"},"schema_version":"1.0"},"canonical_sha256":"a96eda00caa06069755d77c424b5b2e31b68a46da6115a4b01b9f92d4e3c9cef","source":{"kind":"arxiv","id":"1704.01769","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.01769","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"arxiv_version","alias_value":"1704.01769v1","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.01769","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"pith_short_12","alias_value":"VFXNUAGKUBQG","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VFXNUAGKUBQGS5K5","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VFXNUAGK","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VFXNUAGKUBQGS5K5O7CCJNNS4M","target":"record","payload":{"canonical_record":{"source":{"id":"1704.01769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-06T10:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"12b8c48973af002bdacfceca1b20806ce33b27ebe8974152c5f3d16913a5bb99","abstract_canon_sha256":"2233cd538d57c91731d30849f5b8a543b8f37e00a11cfa1f4316091e27471699"},"schema_version":"1.0"},"canonical_sha256":"a96eda00caa06069755d77c424b5b2e31b68a46da6115a4b01b9f92d4e3c9cef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:25.754750Z","signature_b64":"ivUsO72vN5qzkKd4Vg2JPzORYqF/cFCDAS/YFxH1UbluNSurVlsdMXYBx/CrWiPQGtX28INQumYxInNcbKZLAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a96eda00caa06069755d77c424b5b2e31b68a46da6115a4b01b9f92d4e3c9cef","last_reissued_at":"2026-05-18T00:43:25.754075Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:25.754075Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.01769","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"br7RguKpWWPg8ehcAkoS1uzsuNHV8V/Y7VNTWJ0HuIoxs1F85QEUSrhn8ZugHvOmy0s4gg7ejHnrYl6v87SGDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T06:11:57.065205Z"},"content_sha256":"7fb10099bc7b39b73d3f4e9707225542fbb21324f5e5993de009533a4da94eca","schema_version":"1.0","event_id":"sha256:7fb10099bc7b39b73d3f4e9707225542fbb21324f5e5993de009533a4da94eca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VFXNUAGKUBQGS5K5O7CCJNNS4M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of dust extinction curves in galaxy simulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hiroyuki Hirashita, Ikkoh Shimizu, Kentaro Nagamine, Kuan-Chou Hou, Shohei Aoyama","submitted_at":"2017-04-06T10:06:08Z","abstract_excerpt":"To understand the evolution of extinction curve, we calculate the dust evolution in a galaxy using smoothed particle hydrodynamics simulations incorporating stellar dust production, dust destruction in supernova shocks, grain growth by accretion and coagulation, and grain disruption by shattering. The dust species are separated into carbonaceous dust and silicate. The evolution of grain size distribution is considered by dividing grain population into large and small gains, which allows us to estimate extinction curves. We examine the dependence of extinction curves on the position, gas densit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.01769","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:43:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JrJbMlUSBi5dwGIXff/8tdoFhWD/rOniYY5Cb5oOjCstdAhNa6Q9InKKmNwlyeR1ghZAYE5MHrFCcLjgZk0YCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T06:11:57.065882Z"},"content_sha256":"2b1c84b2d1fe60c72e1caab7062fcf8024f073b5a96cba24876612e3a8ca664b","schema_version":"1.0","event_id":"sha256:2b1c84b2d1fe60c72e1caab7062fcf8024f073b5a96cba24876612e3a8ca664b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/bundle.json","state_url":"https://pith.science/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T06:11:57Z","links":{"resolver":"https://pith.science/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M","bundle":"https://pith.science/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/bundle.json","state":"https://pith.science/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VFXNUAGKUBQGS5K5O7CCJNNS4M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VFXNUAGKUBQGS5K5O7CCJNNS4M","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2233cd538d57c91731d30849f5b8a543b8f37e00a11cfa1f4316091e27471699","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-06T10:06:08Z","title_canon_sha256":"12b8c48973af002bdacfceca1b20806ce33b27ebe8974152c5f3d16913a5bb99"},"schema_version":"1.0","source":{"id":"1704.01769","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.01769","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"arxiv_version","alias_value":"1704.01769v1","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.01769","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"pith_short_12","alias_value":"VFXNUAGKUBQG","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VFXNUAGKUBQGS5K5","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VFXNUAGK","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:2b1c84b2d1fe60c72e1caab7062fcf8024f073b5a96cba24876612e3a8ca664b","target":"graph","created_at":"2026-05-18T00:43:25Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"To understand the evolution of extinction curve, we calculate the dust evolution in a galaxy using smoothed particle hydrodynamics simulations incorporating stellar dust production, dust destruction in supernova shocks, grain growth by accretion and coagulation, and grain disruption by shattering. The dust species are separated into carbonaceous dust and silicate. The evolution of grain size distribution is considered by dividing grain population into large and small gains, which allows us to estimate extinction curves. We examine the dependence of extinction curves on the position, gas densit","authors_text":"Hiroyuki Hirashita, Ikkoh Shimizu, Kentaro Nagamine, Kuan-Chou Hou, Shohei Aoyama","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-06T10:06:08Z","title":"Evolution of dust extinction curves in galaxy simulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.01769","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7fb10099bc7b39b73d3f4e9707225542fbb21324f5e5993de009533a4da94eca","target":"record","created_at":"2026-05-18T00:43:25Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2233cd538d57c91731d30849f5b8a543b8f37e00a11cfa1f4316091e27471699","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-06T10:06:08Z","title_canon_sha256":"12b8c48973af002bdacfceca1b20806ce33b27ebe8974152c5f3d16913a5bb99"},"schema_version":"1.0","source":{"id":"1704.01769","kind":"arxiv","version":1}},"canonical_sha256":"a96eda00caa06069755d77c424b5b2e31b68a46da6115a4b01b9f92d4e3c9cef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a96eda00caa06069755d77c424b5b2e31b68a46da6115a4b01b9f92d4e3c9cef","first_computed_at":"2026-05-18T00:43:25.754075Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:25.754075Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ivUsO72vN5qzkKd4Vg2JPzORYqF/cFCDAS/YFxH1UbluNSurVlsdMXYBx/CrWiPQGtX28INQumYxInNcbKZLAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:25.754750Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.01769","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7fb10099bc7b39b73d3f4e9707225542fbb21324f5e5993de009533a4da94eca","sha256:2b1c84b2d1fe60c72e1caab7062fcf8024f073b5a96cba24876612e3a8ca664b"],"state_sha256":"cda476d0882a91f531a972192c8a6a7da7aac5dcf4a868064a35c13f29b5c036"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xxG0MAhTM+Mig7T9aqFLRFpN18Q2PTsmtL10hQ6n4DjBFspdOzSg5ciR7cJZd1lfIUIn6FLbPGdPdXYe1OwoAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T06:11:57.069191Z","bundle_sha256":"e6628762f2976b2ade0672625aac1620f5f92f0df8bba87d19b132a338df5c4b"}}