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Session 57 - Astrophysical Diagnostics from Polarimetry.
Display session, Wednesday, June 12
Tripp Commons,
We present spectropolarimetry of Nova Cas 1995 obtained at the WIYN observatory. This is a continuation of the monitoring of Nova Cas begun at the University of Wisconsin's Pine Bluff Observatory. The polarization changed dramatically between observations, indicating ongoing changes in the optical depth and geometry of the ejecta. In addition, variations of the polarization and position angle across H\alpha are indicative of two shells with symmetry axes nearly perpendicular to each other. We argue that the shells are the beginnings of the equatorial ring/polar cap geometry observed in some old nova shells.
