期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 414, 期 2, 页码 968-984出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2011.18284.x
关键词
ISM: kinematics and dynamics; galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: kinematics and dynamics; galaxies: spiral; galaxies: structure
资金
- STFC [PP/D005574/1, ST/F009186/1]
- Royal Society
- UK Research Councils [PP/E001114/1, ST/H002456/1, PPA/V/S/2002/00553, PP/E001564/1, ST/H504862/1]
- Christ Church, Oxford
- Royal Society [502011.K502/jd, JP0869822]
- ESO
- Gemini Observatory
- DFG
- INSU/CNRS (France)
- MPG (Germany)
- ING (Spain)
- states of California
- states of Illinois
- states 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
- National Aeronautics and Space Administration
- STFC [ST/G004331/1, PP/E003427/1, ST/H002456/1, ST/F009186/1, ST/I003673/1, PP/D005574/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D005574/1, ST/H002456/1, ST/G004331/1, ST/I003673/1, PP/E003427/1, ST/F009186/1] Funding Source: researchfish
We demonstrate here using both single-dish and interferometric observations that CO molecules are an excellent kinematic tracer, even in high-mass galaxies, allowing us to investigate for the first time the CO Tully-Fisher relation (CO-TFR) of early-type galaxies. We compare the TFRs produced using both single-dish and interferometric data and various inclination estimation methods, and evaluate the use of the velocity profile shape as a criterion for selecting galaxies in which the molecular gas extends beyond the peak of the rotation curve. We show that the gradient and zero-point of the best-fitting relations are robust, independent of the velocity measure and inclination used, and agree with those of relations derived using stellar kinematics. We also show that the early-type CO-TFR is offset from the CO-TFR of spirals by 0.98 +/- 0.22 mag at K-s band, in line with other results. The intrinsic scatter of the relation is found to be approximate to 0.4 mag, similar to the level found in the spiral galaxy population. Next-generation facilities such as the Large Millimeter Telescope and the Atacama Large Millimeter/Sub-millimeter Array should allow this technique to be used in higher redshift systems, providing a simple new tool to trace the mass-to-light ratio evolution of the most massive galaxies over cosmic time.
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