Monday

Classical novae are a sub-type of cataclysmic variable and are characterised by explosive light-curves whose development are followed from radio through to gamma wavelengths. Since the ‘60s the observed, typically weak, polarization from novae have been attributed to a mixture of grain and electron scattering and is useful for measuring phenomena such as grain distribution and orientation as well as clumpiness. In this work we present 15 nights of observations of the DQ Her-like nova V5668 Sgr (2015), after its dust formation phase, with RINGO3 on the Liverpool Telescope, coupled with 3 nights of observations with the DIPOL2 instrument on the WHT and spectroscopy from SPRAT on the Liverpool Telescope. The observations reveal considerable polarimetric variability before and after nights that show internal shocks in the nova outflow. Combining high-quality gamma, X-ray, UV and IR observations from the literature paired with the polarimetry allows us to estimate the nova shell position angle and information on the dust grains causing the scattering. The spectroscopy allows us to derive physical conditions on separate nights including outflow velocity and structure, nebular density, temperature and ionization conditions. Thus the combination of polarimetry, photometry and spectroscopy allow for the development of morpho-kinematic and photoionization models (using Shape and Cloudy respectively) that would not be possible with any singular technique.