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Paper: 12CO (J=1-0) Survey with NRO 45 m of GOALS Luminous Infrared Galaxies: Star Formation Efficiency against Galactic Merger and AGN Activity
Volume: 476, New Trends in Radio Astronomy in the ALMA Era
Page: 297
Authors: Yamashita, T.; Komugi, S.; Matsuhara, H.; Armus, L.; Inami, H.; Stierwalt, S.; Kohno, K.; Iono, D.; Arimatsu, K.
Abstract: We present results of the 12CO(J=1-0) survey of 46 nearby luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS). This survey aims to obtain molecular gas mass MH2 and to investigate the star-forming activity of local LIRGs. The estimated star formation efficiency (SFE) is 9.0±5.5 Gyr-1 in average, which is higher than normal IR galaxies but lower than ULIRGs. No clear correlation was found either between the SFE and the 6.2μm PAH equivalent width; an indicator of AGN activity, or between the SFE and the stage of the galaxy merging.
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