WHTZ 1: a high excitation Planetary Nebula not a gaseous cocoon from runaway star HD 185806
Parker, Quentin A.; Ritter, Andreas; Garde, Olivier; Le Dû, Pascal; Mulato, Lionel; Petit, Thomas; Goodhew, Peter; Rasool, Sakib; Charbonnel, Stephane
Hong Kong SAR, France, United Kingdom
Abstract
We present evidence that the nebular cocoon and bow-shock emission nebula putatively and recently reported as deriving from the 9th magnitude 'runaway' star HD 185806 is the previously discovered but obscure Planetary Nebula WHTZ 1 (Ra 7). It has a Gaia DR3 G~16 blue ionizing star at its geometric centre. We present imagery, spectroscopy, other data and arguments to support that this emission source is a high excitation Planetary Nebula not a stellar wind bow shock.