Evidence for a Binary origin of the Young Planetary Nebula HB 12
Abstract
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, which can be suggestive of a low-mass nature of the secondary component.
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Cite
@article{arxiv.nlin/0603006,
title = {Evidence for a Binary origin of the Young Planetary Nebula HB 12},
author = {Chih Hao Hsia and Wing Huen Ip and Jin Zeng Li},
journal= {arXiv preprint arXiv:nlin/0603006},
year = {2009}
}
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