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| Paper: |
The Stellar Mass Tully-Fisher Relation to z = 1.2 |
| Volume: |
380, At the Edge of the Universe: Latest Results from the Deepest Astronomical Surveys |
| Page: |
477 |
| Authors: |
Kassin, S.A.; Weiner, B.J.; Faber, S.M.; Koo, D.C.; Lotz, J.M.; the AEGIS Collaboration |
| Abstract: |
Newly measured rotation velocities, velocity dispersions, and stellar masses are used to construct stellar mass Tully-Fisher relations (M*TFRs) for 544 galaxies with strong emission lines at 0.1 < z < 1.2. Data are from the All Wavelength Extended Groth Strip International Survey (AEGIS) and the Deep Extragalactic Evolutionary Probe 2 Survey (DEEP2). The conventional M*TFR using only rotation velocity (Vrot) shows large scatter (~ 1.5 dex in velocity). The scatter and residuals are correlated with morphology in the sense that disturbed, compact, and major merger galaxies have lower velocities for their masses. We construct an M*TFR using the kinematic estimator S0.5 which is defined as √(0.5V2rot + σ2g and accounts for disordered or non-circular motions through the gas velocity dispersion (σg). The new M*TFR, termed S0.5/M*TFR, is remarkably tight over 0.1 < z < 1.2 with no detectable evolution of its intercept or slope with redshift. Interestingly, the S0.5/M*TFR is consistent with the absorption-line based stellar mass Faber-Jackson relation for nearby elliptical galaxies in terms of slope and intercept, which might suggest a physical connection between the two relations. |
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