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Paper: Reformation of Cold Molecular Disks in Merger Remnants
Volume: 476, New Trends in Radio Astronomy in the ALMA Era
Page: 61
Authors: Ueda, J.; Iono, D.; Yun, M.; Wilner, D.; Narayanan, D.; Hatsukade, B.; Tamura, Y.; Kaneko, H.; Crocker, A.; Espada, D.; Kawabe, R.
Abstract: We present observational evidence for forming a molecular gas disk in merging galaxies using new and archival interferometric CO maps of 37 optically selected merger remnants in the local universe. We found that 65% (24/37) of the merger remnants sample shows kinematical signatures of a rotating disk in the interferometer maps. The sources with an extended CO disk have high FIR luminosities (∼ 1011 L), which suggests that active star formation takes place in the extended CO disks and stellar disks will be possibly formed. The molecular gas–to–stellar mass ratio for merger remnants is larger than that of the stellar mass matched early-type galaxies. However, there is no significant evidence suggesting that the high gas mass ratio leads to a more efficient formation of a molecular gas disk.
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