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Dense molecular gas dynamics are traced with ${\\rm HCN} (J=1-0)$ and ${\\rm HCO^{+}} (J=1-0)$ emission lines. Assuming a host galaxy inclination of $46^{\\circ}$, we derive a SMBH mass, $M_{\\rm BH}=1.40^{+0.27}_{-0.32} \\times 10^{8}M_{\\odot}$, and an I-band mass to light ratio to be $5.14^{+0.03}_{-0.04}$, using ${\\rm HCN} (J=1-0)$. The estimated parameters are consistent bet"},"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":"1506.05917","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-19T08:52:25Z","cross_cats_sorted":[],"title_canon_sha256":"078aa41639c2d00d373d8759edfbd15bf7d2aa61a7ddc0ea6a03f782071f1def","abstract_canon_sha256":"bf3b64b2c5268bb27e31d4798cecb1505374d1d815b97b637105448455f77ee1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:46.862693Z","signature_b64":"0tklImijGep2cqKcJZ4yoQYtHE1lpPIP9e+y6nHc2IsRecX2hY91HL3MSJX9cJQAJI83tI49zVoLPjLXGAB9DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5a48270d113777a699b360a7dcd9d53a53f1e44afa3a315a1ee891487dac04a","last_reissued_at":"2026-05-18T01:42:46.862081Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:46.862081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Measurement of the Black-Hole Mass in NGC 1097 using ALMA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2), (2) National Astronomical Observatory of Japan), Kartik Sheth, Kotaro Kohno ((1) SOKENDAI (The Graduate University for Advanced Studies), Kyoko Onishi (1, Satoru Iguchi","submitted_at":"2015-06-19T08:52:25Z","abstract_excerpt":"We present an estimate of the mass of the supermassive black hole (SMBH) in the nearby type-1 Seyfert galaxy \\object{NGC 1097} using Atacamma Large Millimeter/Submillimeter Array (ALMA) observations of dense gas kinematics. 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