LK-Ha 233 NUV polarization HST images

Two of the key features of such stars are their circumstellar dusty disk and bipolar ionized outflows, which are key components for understanding planet formation processes and energy/matter deposition in the interstellar medium, respectively. In this context, imaging polarimetry is probably the sharpest tool to characterize the various structures and dynamics around the central star, due to the sensitivity of polarization to the morphology of the emitting, scattering and absorbing media.

We take advantage of never published, near-ultraviolet polarimetric data of LK-Halpha-233 taken by the Faint Object Camera aboard the Hubble Space Telescope in 1991, 1994 and 1995, which remained dormant in the archives despite their quality. Using the most recent and robust reduction pipeline for this instrument, we obtained high spatial resolution (0.0287x0.0287-arcsecond^2^) maps of this object at 4118{AA}, together with polarimetric measurements.