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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

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
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Publications of the Astronomical Society of Japan
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: [ID No:2]
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