Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910204a&link_type=abstract
American Astronomical Society, AAS Meeting #219, #102.04
Astronomy and Astrophysics
Astronomy
Scientific paper
Molecular gas in early-type galaxies (ETGs) has been shown to be far more common than previously expected. In fact, at least 22% (60/259) contain a significant reservoir of molecular gas. To gain insight into the presence and prevalence of this unexpected gas, it is important to understand its timeline, where it originated, how it is evolving, and how long it will remain. Imaging of the molecular gas is essential addressing these issues. We present the CO maps of 31 ETGs in the ATLAS3D survey, imaged with the Combined Array for Research for Millimeter Astronomy (CARMA), the largest systematic survey of the cold ISM in ETGs to date. ETGs feature a rich variety of gas configurations, including disks, extended molecular rings, spiral arms, and disrupted merger remnants. The menagerie observed by CARMA illustrates that the various paths molecular gas takes in ETGs is complex and nuanced, ranging from objects undergoing an interaction to those with purely quiescent origins. We also detail the rich molecular story of NGC1266, and how it plays host to an AGN-driven molecular outflow, quenching its star-forming material within the next 100 Myr. The ATLAS3D survey is a complete volume-limited survey of 259 massive (Mgal > 6e9 Msuns) ellipticals and lenticulars within 42 Mpc. It provides the best constraints on the formation and evolution of local early-type galaxies through multi-wavelength studies. Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the James S. McDonnell Foundation, the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the University of Chicago, the Associates of the California Institute of Technology, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities.
Alatalo Katherine A.
ATLAS3D Collaboration
Blitz Leo
Bureau Martin
Cappellari Michele
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