Investigating AGN/Starburst activities through ALMA multi-line observations in the mid-stage IR-bright merger VV 114. Issue Volume 10:Issue S309(2014) (9th February 2015)

• Record Type: Journal Article
• Authors: Saito, Toshiki; Iono, Daisuke; Yun, Min S.; Ueda, Junko; Espada, Daniel; Hagiwara, Yoshiaki; Imanishi, Masatoshi; Motohara, Kentaro; Nakanishi, Kouichiro; Sugai, Hajime; Tateuchi, Ken; Lee, Minju; Kawabe, Ryohei
• Editors: Ziegler, Bodo L.; Combes, Françoise; Dannerbauer, Helmut; Verdugo, Miguel
• Is Part Of: Proceedings of the International Astronomical Union. Volume 10:Issue S309(2014)
• Page Start: 196
• Page End: 199
• Publication Date: 2015-02-09
• Subjects: galaxies: interaction - galaxies: starburst - ISM: molecules; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S174392131400965X
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We present ALMA cycle 0 observations of the luminous merger VV 114. One of the main goals is to investigate mechanisms of molecular line ratio enhancement. Regions with the high 12 CO (1–0)/ 13 CO (1–0) and 12 CO (3–2)/ 12 CO (1–0) is located at a central filamentary structure (∼6 kpc) in VV 114. The filament consists of the eastern nucleus and the overlap region, where the galaxy disks are colliding. We also investigate these molecular line ratios on the Kennicutt-Schmidt law. VV 114 fills a gap between the "starburst" sequence and the "normal disk" sequence, and regions with the high ratios show the high ΣSFR and ΣH2 . We suggest that the high ratios in VV 114 are due to star-forming activities in the both progenitor's nuclei and the merger-induced overlap region.