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Home Search Quick Search Advanced Fulltext Browse Collections Persons My eDoc Session History Login Name: Password: Documentation Help Support Wiki Direct access to document ID:	Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents   history ID: 693684.0, MPI für Astronomie / Publikationen_mpia Submillimeter ALMA observations of the dense gas in the low-luminosity type-1 active nucleus of NGC 1097 Authors: Izumi, Takuma; Kohno, Kotaro; Martín, Sergio; Espada, Daniel; Harada, Nanase; Matsushita, Satoki; Hsieh, Pei-Ying; Turner, Jean L.; Meier, David S.; Schinnerer, Eva; Imanishi, Masatoshi; Tamura, Yoichi; Curran, Max T.; Doi, Akihiro; Fathi, Kambiz; Krips, Melanie; Lundgren, Andreas A.; Nakai, Naomasa; Nakajima, Taku; Regan, Michael W.; Sheth, Kartik; Takano, Shuro; Taniguchi, Akio; Terashima, Yuichi; Tosaki, Tomoka; Wiklind, Tommy Language: English Date of Publication (YYYY-MM-DD): 2013 Title of Journal: Publications of the Astronomical Society of Japan Volume: 65 Issue / Number: 5 Start Page: id. 100 (26 pp) Review Status: Peer-review Audience: Experts Only Abstract / Description: We present the first 100 pc scale view of the dense molecular gas in the central ˜ 1.3 kpc of the type-1 Seyfert NGC 1097, traced by HCN (J = 4-3) and HCO+ (J = 4-3) lines afforded with ALMA band 7. This galaxy shows significant HCN enhancement with respect to HCO+ and CO in the low-J transitions, which seems to be a common characteristic in AGN environments. Using the ALMA data, we consider the characteristics of the dense gas around this AGN, and search for the mechanism of HCN enhancement. We find a high HCN (J = 4-3) to HCO+ (J = 4-3) line ratio in the nucleus. The upper limit of the brightness temperature ratio of HCN (v2 ˜ 11f, J = 4-3) to HCN (J = 4-3) is 0.08, which indicates that Free Keywords: galaxies: active; galaxies: individual (NGC 1097); galaxies: ISM; galaxies: Seyfert External Publication Status: published Document Type: Article Communicated by: N. N. Affiliations: MPI für Astronomie Identifiers: ISSN:0004-6264 [ID No:1] URL:http://cdsads.u-strasbg.fr/abs/2013PASJ...65..100I [ID No:2] The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.