Title: Spin-Orbit Misalignments of Three Jovian Planets via Doppler Tomography,
Abstract: We present measurements of the spin-orbit misalignments of the hot Jupiters
HAT-P-41 b and WASP-79 b, and the aligned warm Jupiter Kepler-448 b. We
obtained these measurements with Doppler tomography, where we spectroscopically
resolve the line profile perturbation during the transit due to the
Rossiter-McLaughlin effect. We analyze time series spectra obtained during
portions of five transits of HAT-P-41 b, and find a value of the spin-orbit
misalignment of $\lambda = -22.1_{-6.0}^{+0.8 \circ}$. We reanalyze the radial
velocity Rossiter-McLaughlin data on WASP-79 b obtained by Addison et al.
(2013) using Doppler tomographic methodology. We measure
$\lambda=-99.1_{-3.9}^{+4.1\circ}$, consistent with but more precise than the
value found by Addison et al. (2013). For Kepler-448 b we perform a joint fit
to the Kepler light curve, Doppler tomographic data, and a radial velocity
dataset from Lillo-Box et al. (2015). We find an approximately aligned orbit
($\lambda=-7.1^{+4.2 \circ}_{-2.8}$), in modest disagreement with the value
found by Bourrier et al. (2015). Through analysis of the Kepler light curve we
measure a stellar rotation period of $P_{\mathrm{rot}}=1.27 \pm 0.11$ days, and
use this to argue that the full three-dimensional spin-orbit misalignment is
small, $\psi\sim0^{\circ}$.