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Aniano, Hans-Walter Rix, Hendrik Linz, Karin Sandstrom, Oliver Krause, Robert Braun, Ulrich Klaas","submitted_at":"2013-06-10T19:59:00Z","abstract_excerpt":"Spitzer Space Telescope and Herschel Space Observatory imaging of M31 is used, with a physical dust model, to construct maps of dust surface density, dust-to-gas ratio, starlight heating intensity, and PAH abundance, out to R=25kpc. The global dust mass is M_d=5.4x10^7Msol, the global dust/H mass ratio is M_d/M_H=0.0081, and the global PAH abundance is <q_PAH>=0.039. The dust surface density has an inner ring at R=5.6kpc, a maximum at R=11.2kpc, and an outer ring at R=15.1kpc. The dust/gas ratio varies from M_d/M_H=0.026 at the center to ~0.0027 at R=25kpc. From the dust/gas ratio, we estimate"},"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":"1306.2304","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-10T19:59:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"60d3c48bcb54d61d4bec509ef5b5266be90a3831facf3a65cd9ed11c9c2445ce","abstract_canon_sha256":"8339b81902cfaa3b4f80c5cea457a54de1da448333f282bb04e89ccc60cee3c8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:24.117725Z","signature_b64":"cDM44AzMRsuZROb8D8UB801Xv0eAo92xpW5bhm6prRxlNMcrQMQZNkh0thKvNIpQPLNhcYgwpZcwFVyC8a64BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f000613c4c9122733c92bb2dd345762d99ae732d2113ad4e56155b751a1bd28d","last_reissued_at":"2026-05-18T01:49:24.116938Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:24.116938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Andromeda's Dust","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Adam Leroy, Anika Schmiedeke, Brent Groves, B.T. Draine, Eva Schinnerer, Fabian Walter, G. Aniano, Hans-Walter Rix, Hendrik Linz, Karin Sandstrom, Oliver Krause, Robert Braun, Ulrich Klaas","submitted_at":"2013-06-10T19:59:00Z","abstract_excerpt":"Spitzer Space Telescope and Herschel Space Observatory imaging of M31 is used, with a physical dust model, to construct maps of dust surface density, dust-to-gas ratio, starlight heating intensity, and PAH abundance, out to R=25kpc. The global dust mass is M_d=5.4x10^7Msol, the global dust/H mass ratio is M_d/M_H=0.0081, and the global PAH abundance is <q_PAH>=0.039. The dust surface density has an inner ring at R=5.6kpc, a maximum at R=11.2kpc, and an outer ring at R=15.1kpc. The dust/gas ratio varies from M_d/M_H=0.026 at the center to ~0.0027 at R=25kpc. 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