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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/225325
- The ATLAS3D project V: the CO Tully-Fisher relation of early-type galaxies
- Davis, Timothy A.; Bureau, Martin; Young, Lisa M.; Alatalo, Katherine; Blitz, Leo; Cappellari, Michele; Scott, Nicholas; Bois, Maxime; Bournaud, Frederic; Davies, Roger L.; de Zeeuw, P. Tim; Emsellem, Eric; Khochfar, Sadegh; Krajnovic, Davor; Kuntschner, Harald; Lablanche, Pierre-Yves; McDermid, Richard M.; Morganti, Raffaella; Naab, Thorsten; Oosterloo, Tom; Sarzi, Marc; Serra, Paolo; Weijmans, Anne-Marie
- 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 Ks band, in line with other results. The intrinsic scatter of the relation is found to be ≈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.
- Publication type
- Journal article
- Monthly Notices of the Royal Astronomical Society, Vol. 414, no. 2 (Jun 2011), pp. 968-984
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences
- ATLAS3D; cD galaxies; Elliptical and lenticular galaxies; Galaxy evolution; Galaxy kinematics and dynamics; Galaxy structure; ISM; Spiral galaxies
- Publisher URL
- Copyright © 2011 The Authors. Journal compilation copyright © 2011 Royal Astronomical Society.
- Peer reviewed