The young planetary nebulae play an important role in stellar evolution when
intermediate- to low-mass stars (0.8 ∼ 8 M⊙​) evolve from the
proto-planetary nebulae phase to the planetary nebulae phase. Many young
planetary nebulae display distinct bipolar structures as they evolve away from
the proto-planetary nebulae phase. One possible cause of their bipolarity could
be due to a binary origin of its energy source. Here we report our detailed
investigation of the young planetary nebula, Hubble 12, which is well-known for
its extended hourglass-like envelope. We present evidence with time-series
photometric observations the existence of an eclipsing binary at the center of
Hubble 12. Low-resolution spectra of the central source show, on the other
hand, absorption features such as CN, G-band & Mg b{\arcsec}, which can be
suggestive of a low-mass nature of the secondary component.Comment: 9 pages, 11 figures, Accepted for publication in A
