A Tully-Fisher Relation for S0 Galaxies
A Tully-Fisher Relation for S0 Galaxies
We present an I-band Tully-Fisher relation (TFR) for 18 nearby S0 galaxies using kinematics derived from long-slit spectroscopy of stellar absorption lines. Our estimates of the circular velocity, Vc, at 2–3 exponential disk scale lengths account for line-of-sight projection and for the stellar random motions through an asymmetric drift correction. …