Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 432, Issue 3, Pages 1796-1844Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts299
Keywords
surveys; ISM: molecules; galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: ISM; galaxies: star formation
Categories
Funding
- NSF [AST-0838258, AST-0908572]
- NASA [HST-GO-12526]
- Gemini Observatory
- UK Research Councils [PP/E001114/1, ST/H002456/1]
- Christ Church, Oxford
- Royal Society [502011.K502/jd]
- DFG Cluster of Excellence
- state of California
- state of Illinois
- state of Maryland
- James S. McDonnell Foundation
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- University of Chicago
- Associates of the California Institute of Technology
- National Science Foundation
- INSU/CNRS (France)
- MPG (Germany)
- ING (Spain)
- National Aeronautics and Space Administration
- Science and Technology Facilities Council [ST/H002456/1, ST/K005596/1, ST/K00106X/1, PP/E003427/1] Funding Source: researchfish
- STFC [PP/E003427/1, ST/K00106X/1, ST/H002456/1, ST/H000704/1, ST/F009186/1, ST/K005596/1, ST/K000810/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1140019, 1139998, 1139950] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1140031, 1140063] Funding Source: National Science Foundation
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We present the Combined Array for Research in Millimeter Astronomy (CARMA) ATLAS(3D) molecular gas imaging survey, a systematic study of the distribution and kinematics of molecular gas in CO-rich early-type galaxies. Our full sample of 40 galaxies (30 newly mapped and 10 taken from the literature) is complete to a (CO)-C-12(1-0) integrated flux of 18.5 Jy km s(-1),(1) and it represents the largest, best studied sample of its type to date. A comparison of the CO distribution of each galaxy to the g - r colour image (representing dust) shows that the molecular gas and dust distributions are in good agreement and trace the same underlying interstellar medium. The galaxies exhibit a variety of CO morphologies, including discs (50 per cent), rings (15 per cent), bars+rings (10 per cent), spiral arms (5 per cent) and mildly (12.5 per cent) and strongly (7.5 per cent) disrupted morphologies. There appear to be weak trends between galaxy mass and CO morphology, whereby the most massive galaxies in the sample tend to have molecular gas in a disc morphology. We derive a lower limit to the total accreted molecular gas mass across the sample of 2.48 x 10(10) M-circle dot, or approximately 8.3 x 10(8) M-circle dot per minor merger within the sample, consistent with minor merger stellar mass ratios.
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