Hsia, C.-H., Kwok, S., Chau, W., and Zhang, Y. Coaxial rings and H2 knots in Hubble 12, 2016, Journal of Physics: Conference Series, 728, 072009

ADS: Journal of Physics: Conference Series, 728, 072009 (2016)

 

Abstract

Hubble 12 (Hb 12) is a young planetary nebula (PN) exhibiting nested shells. We present new near-infrared narrow-band imaging observations of Hb 12 using the Canada-France- Hawaii Telescope (CFHT). A number of co-axial rings aligned with the bipolar lobes and two pairs of separate H2 knots with different orientations are detected.