{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:J5WR354R6NJJZ6OS3YWBAZD3Y2","short_pith_number":"pith:J5WR354R","schema_version":"1.0","canonical_sha256":"4f6d1df791f3529cf9d2de2c10647bc6b987c91ed033f6a66caa59e459ec2ab3","source":{"kind":"arxiv","id":"2009.13582","version":2},"attestation_state":"computed","paper":{"title":"The 2175 {\\AA} dust feature in star-forming galaxies at $1.3\\le z\\le 1.8$: the dependence on stellar mass and specific star formation rate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alvio Renzini, Daichi Kashino, David B. Sanders, Elena Zucca, Emanuele Daddi, Jeyhan S. Kartaltepe, John D. Silverman, Olga Cucciati, Roser Pell\\'o, Sandro Bardelli, Simon J. Lilly, Vincenzo Mainieri, Ying-jie Peng","submitted_at":"2020-09-28T18:56:14Z","abstract_excerpt":"We present direct spectroscopic measurements of the broad 2175~{\\AA} absorption feature in 505 star-forming main-sequence galaxies at $1.3\\le z\\le 1.8$ using individual and stacked spectra from the zCOSMOS-deep survey. Significant 2175~{\\AA} excess absorption features of moderate strength are measured, especially in the composite spectra. The excess absorption is well described by a Drude profile. The bump amplitude expressed in units of $k(\\lambda)=A(\\lambda)/E(B-V)$, relative to the featureless Calzetti et al. law, has a range $B_k\\approx0.2\\textrm{--}0.8$. The bump amplitude decreases with "},"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":"2009.13582","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-28T18:56:14Z","cross_cats_sorted":[],"title_canon_sha256":"d5f29f7bf653a8b7a2cdf0983d4d8935087b1453ffba041bbaea9b1b7051d73a","abstract_canon_sha256":"97126eabcd9c73f720e2c470f1d38d1c16c1b34c856fb06f8d086b7312b110de"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:31:19.628416Z","signature_b64":"ebG7bCfZh1WQzo6JPwIY7Lc2xbZuIsleUMqmr8sTuCLP9MfwHitPWSU4OXrIJfSbVqhoaddvBBH/iB03irNKAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f6d1df791f3529cf9d2de2c10647bc6b987c91ed033f6a66caa59e459ec2ab3","last_reissued_at":"2026-07-05T02:31:19.627908Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:31:19.627908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The 2175 {\\AA} dust feature in star-forming galaxies at $1.3\\le z\\le 1.8$: the dependence on stellar mass and specific star formation rate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alvio Renzini, Daichi Kashino, David B. Sanders, Elena Zucca, Emanuele Daddi, Jeyhan S. Kartaltepe, John D. Silverman, Olga Cucciati, Roser Pell\\'o, Sandro Bardelli, Simon J. Lilly, Vincenzo Mainieri, Ying-jie Peng","submitted_at":"2020-09-28T18:56:14Z","abstract_excerpt":"We present direct spectroscopic measurements of the broad 2175~{\\AA} absorption feature in 505 star-forming main-sequence galaxies at $1.3\\le z\\le 1.8$ using individual and stacked spectra from the zCOSMOS-deep survey. Significant 2175~{\\AA} excess absorption features of moderate strength are measured, especially in the composite spectra. The excess absorption is well described by a Drude profile. The bump amplitude expressed in units of $k(\\lambda)=A(\\lambda)/E(B-V)$, relative to the featureless Calzetti et al. law, has a range $B_k\\approx0.2\\textrm{--}0.8$. The bump amplitude decreases with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.13582","kind":"arxiv","version":2},"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/2009.13582/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":"2009.13582","created_at":"2026-07-05T02:31:19.627964+00:00"},{"alias_kind":"arxiv_version","alias_value":"2009.13582v2","created_at":"2026-07-05T02:31:19.627964+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.13582","created_at":"2026-07-05T02:31:19.627964+00:00"},{"alias_kind":"pith_short_12","alias_value":"J5WR354R6NJJ","created_at":"2026-07-05T02:31:19.627964+00:00"},{"alias_kind":"pith_short_16","alias_value":"J5WR354R6NJJZ6OS","created_at":"2026-07-05T02:31:19.627964+00:00"},{"alias_kind":"pith_short_8","alias_value":"J5WR354R","created_at":"2026-07-05T02:31:19.627964+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.10573","citing_title":"Mapping Dust Attenuation at Kiloparsec Scales. III. The 2175\\AA\\ Bump","ref_index":121,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2","json":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2.json","graph_json":"https://pith.science/api/pith-number/J5WR354R6NJJZ6OS3YWBAZD3Y2/graph.json","events_json":"https://pith.science/api/pith-number/J5WR354R6NJJZ6OS3YWBAZD3Y2/events.json","paper":"https://pith.science/paper/J5WR354R"},"agent_actions":{"view_html":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2","download_json":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2.json","view_paper":"https://pith.science/paper/J5WR354R","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2009.13582&json=true","fetch_graph":"https://pith.science/api/pith-number/J5WR354R6NJJZ6OS3YWBAZD3Y2/graph.json","fetch_events":"https://pith.science/api/pith-number/J5WR354R6NJJZ6OS3YWBAZD3Y2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2/action/storage_attestation","attest_author":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2/action/author_attestation","sign_citation":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2/action/citation_signature","submit_replication":"https://pith.science/pith/J5WR354R6NJJZ6OS3YWBAZD3Y2/action/replication_record"}},"created_at":"2026-07-05T02:31:19.627964+00:00","updated_at":"2026-07-05T02:31:19.627964+00:00"}