{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360004239671325696.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.3847/0004-637x/827/1/69"}},{"identifier":{"@type":"URI","@value":"http://stacks.iop.org/0004-637X/827/i=1/a=69/pdf"}},{"identifier":{"@type":"URI","@value":"http://stacks.iop.org/0004-637X/827/i=1/a=69?key=crossref.51528dba6cc7e50f8af5896bf1b02deb"}},{"identifier":{"@type":"URI","@value":"https://iopscience.iop.org/article/10.3847/0004-637X/827/1/69"}},{"identifier":{"@type":"URI","@value":"https://iopscience.iop.org/article/10.3847/0004-637X/827/1/69/pdf"}},{"identifier":{"@type":"DOI","@value":"10.48550/arxiv.1604.07937"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"A SEARCH FOR SUBMILLIMETER H<sub>2</sub>O MASERS IN ACTIVE GALAXIES: THE DETECTION OF 321 GHz H<sub>2</sub>O MASER EMISSION IN NGC 4945"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>ABSTRACT</jats:title>\n               <jats:p>We present further results of a search for extragalactic submillimeter H<jats:sub>2</jats:sub>O masers using the Atacama Large Millimeter/submillimeter Array (ALMA). The detection of a 321 GHz H<jats:sub>2</jats:sub>O maser in the nearby type 2 Seyfert galaxy, the Circinus galaxy, has previously been reported, and here the spectral analysis of four other galaxies is described. We have discovered H<jats:sub>2</jats:sub>O maser emission at 321 GHz toward the center of NGC 4945, a nearby type 2 Seyfert. The maser emission shows Doppler-shifted velocity features with velocity ranges similar to those of the previously reported 22 GHz H<jats:sub>2</jats:sub>O masers; however, the non-contemporaneous observations also show differences in velocity offsets. The subparsec-scale distribution of the 22 GHz H<jats:sub>2</jats:sub>O masers revealed by earlier very long baseline interferometry observations suggests that the submillimeter masers could arise in an edge-on rotating disk. The maser features remain unresolved by the synthesized beam of ∼0.″54 (∼30 pc) and are located toward the 321 GHz continuum peak within errors. A marginally detected (3<jats:italic>σ</jats:italic>) high-velocity feature is redshifted by 579 km <jats:inline-formula>\n                     <jats:tex-math>\n\n</jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"apjaa2e0aieqn1.gif\" xlink:type=\"simple\"/>\n                  </jats:inline-formula> with respect to the systemic velocity of the galaxy. Assuming that this feature is real and arises from a Keplerian rotating disk in this galaxy, it is located at a radius of ∼0.020 pc (∼1.5 × 10<jats:sup>5</jats:sup> Schwarzschild radii), which would enable molecular material closer to the central engine to be probed than the 22 GHz H<jats:sub>2</jats:sub>O masers. This detection confirms that submillimeter H<jats:sub>2</jats:sub>O masers are a potential tracer of the circumnuclear regions of active galaxies, which will benefit from higher angular resolution studies with ALMA.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420564276165079168","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60399300"},{"@type":"NRID","@value":"1000060399300"},{"@type":"NRID","@value":"9000387468187"},{"@type":"NRID","@value":"9000347674416"},{"@type":"NRID","@value":"9000346985683"},{"@type":"NRID","@value":"9000402458201"},{"@type":"NRID","@value":"9000329011472"},{"@type":"NRID","@value":"9000000122153"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0125071"}],"foaf:name":[{"@value":"Yoshiaki Hagiwara"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004239671325568","@type":"Researcher","foaf:name":[{"@value":"Shinji Horiuchi"}]},{"@id":"https://cir.nii.ac.jp/crid/1420845751167302528","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"90403641"},{"@type":"NRID","@value":"1000090403641"},{"@type":"NRID","@value":"9000014147508"},{"@type":"NRID","@value":"9000020469607"},{"@type":"NRID","@value":"9000312833979"},{"@type":"NRID","@value":"9000244901701"},{"@type":"NRID","@value":"9000238235559"},{"@type":"NRID","@value":"9000018701603"},{"@type":"NRID","@value":"9000003618676"},{"@type":"NRID","@value":"9000414481749"},{"@type":"NRID","@value":"9000414481760"},{"@type":"NRID","@value":"9000414481767"},{"@type":"NRID","@value":"9000414481781"},{"@type":"NRID","@value":"9000408579185"},{"@type":"NRID","@value":"9000020519176"},{"@type":"NRID","@value":"9000408886490"},{"@type":"NRID","@value":"9000408886500"},{"@type":"NRID","@value":"9000014649235"},{"@type":"NRID","@value":"9000409333307"},{"@type":"NRID","@value":"9000409333321"},{"@type":"NRID","@value":"9000014579315"},{"@type":"NRID","@value":"9000408850236"},{"@type":"NRID","@value":"9000279645049"},{"@type":"NRID","@value":"9000409478651"},{"@type":"NRID","@value":"9000400166202"},{"@type":"NRID","@value":"9000408851523"},{"@type":"NRID","@value":"9000408851539"},{"@type":"NRID","@value":"9000408851112"},{"@type":"NRID","@value":"9000408851120"},{"@type":"NRID","@value":"9000389554997"},{"@type":"NRID","@value":"9000290358133"},{"@type":"NRID","@value":"9000263058483"},{"@type":"NRID","@value":"9000414481592"},{"@type":"NRID","@value":"9000408852541"},{"@type":"NRID","@value":"9000408852529"},{"@type":"NRID","@value":"9000408886897"},{"@type":"NRID","@value":"9000241160617"},{"@type":"NRID","@value":"9000327101656"},{"@type":"NRID","@value":"9000413526911"},{"@type":"NRID","@value":"9000410266961"},{"@type":"NRID","@value":"9000003612412"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/akihirodoi"}],"foaf:name":[{"@value":"Akihiro Doi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004239671325569","@type":"Researcher","foaf:name":[{"@value":"Makoto Miyoshi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004239671325698","@type":"Researcher","foaf:name":[{"@value":"Philip G. Edwards"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0004637X"},{"@type":"EISSN","@value":"15384357"}],"prism:publicationName":[{"@value":"The Astrophysical Journal"}],"dc:publisher":[{"@value":"American Astronomical Society"}],"prism:publicationDate":"2016-08-09","prism:volume":"827","prism:number":"1","prism:startingPage":"69"},"reviewed":"false","dc:rights":["https://iopscience.iop.org/page/copyright","https://iopscience.iop.org/info/page/text-and-data-mining"],"url":[{"@id":"http://stacks.iop.org/0004-637X/827/i=1/a=69/pdf"},{"@id":"http://stacks.iop.org/0004-637X/827/i=1/a=69?key=crossref.51528dba6cc7e50f8af5896bf1b02deb"},{"@id":"https://iopscience.iop.org/article/10.3847/0004-637X/827/1/69"},{"@id":"https://iopscience.iop.org/article/10.3847/0004-637X/827/1/69/pdf"}],"createdAt":"2016-08-09","modifiedAt":"2024-01-09","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Astrophysics%20of%20Galaxies%20(astro-ph.GA)","dc:title":"Astrophysics of Galaxies (astro-ph.GA)"},{"@id":"https://cir.nii.ac.jp/all?q=FOS:%20Physical%20sciences","dc:title":"FOS: Physical sciences"},{"@id":"https://cir.nii.ac.jp/all?q=Astrophysics%20-%20Astrophysics%20of%20Galaxies","dc:title":"Astrophysics - Astrophysics of Galaxies"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781829070336","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H03644"},{"@type":"JGN","@value":"JP15H03644"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H03644/"}],"notation":[{"@language":"ja","@value":"ミリ波帯偏波VLBI観測によるブラックホールジェットの収束機構の解明"},{"@language":"en","@value":"Approaching the creation mechanism of black hole jet using mm-VLBI polarimetry"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782197545984","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"24340042"},{"@type":"JGN","@value":"JP24340042"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24340042/"}],"notation":[{"@language":"ja","@value":"ブラックホール高精度位置決定による活動銀河核の根源的問題の観測的解明"},{"@language":"en","@value":"Precise measurements of black holes for studies of active galactic nuclei"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004234466758144","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"SUBMILLIMETER H\n                    <sub>2</sub>\n                    O MASER IN CIRCINUS GALAXY—A NEW PROBE FOR THE CIRCUMNUCLEAR REGION OF ACTIVE GALACTIC NUCLEI"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011146103261824","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"DISCOVERY OF CANDIDATE H<sub>2</sub>O DISK MASERS IN ACTIVE GALACTIC NUCLEI AND ESTIMATIONS OF CENTRIPETAL ACCELERATIONS"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021390756919168","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Off-nuclear H2O maser and dense molecular gas in NGC 1068"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617480766592","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"ALMA detection of millimetre 183 GHz H2O maser emission in the Superantennae galaxy at <i>z</i> ∼ 0.06"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292618562530688","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"VLBI Imaging of Water Maser Emission from a Nuclear Disk in NGC 1068"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643853345280","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Second-epoch ALMA Observations of 321 GHz Water Maser Emission in NGC 4945 and the Circinus Galaxy"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298754843670272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"ALMA detection of 321 GHz water maser emission in the radio galaxy NGC 1052"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574093608722560","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Evidence for a black hole from high rotation velocities in a sub-parsec region of NGC4258"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574094102881280","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The Discovery of H\n                    <sub>2</sub>\n                    O Maser Emission in Seven Active Galactic Nuclei and at High Velocities in the Circinus Galaxy"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848659397446272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"THE 2014 ALMA LONG BASELINE CAMPAIGN: AN OVERVIEW"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855568976273024","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Microarcsecond proper motions of extragalactic water vapor masers in M33"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855569516771968","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Circumnuclear water vapor masers in active galaxies"}]},{"@id":"https://cir.nii.ac.jp/crid/1360865815687730944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Sub-parsec-scale jet-driven water maser with possible gravitational acceleration in the radio galaxy NGC 1052"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418519861505536","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"321 GHz submillimeter water masers around evolved stars"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418520488544896","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Interpretation of the newly discovered submillimeter water maser"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981468840269952","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Survey for H\n                    <sub>2</sub>\n                    O Megamasers. 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