Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy

Exploiting the relative proximity of nearby strong-lens galaxy SNL-1, we present a critical comparison mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially-resolved stellar kinematics, and compare constraints lens high-resolution photometry. From model, measure total (dynamical) enclosed within projected aperture radius Einstein be $\log_{10} M_{\mathrm{Ein.}} = 11.00 \pm 0.02$, which agrees with previous measurements $5\%$. then explore intrinsic (de-projected) properties best-fitting model. find that SNL-1 has approximately-constant, intermediate triaxiality at all radii. It is oblate-like in inner regions (around radius) tends towards spherical larger The velocity ellipsoid gradually transforms isotropic very central radially-biased outskirts. dynamically consistent broader population, as measured by fraction orbit `temperatures' compared CALIFA survey. On mass--size plane, occupies most-compact edge given its mass, both MaNGA SAMI surveys. Finally, how observed lensing configuration affected orientation galaxy. discuss implications such detailed on future combined analyses.