most citedVariability in Proto-Planetary Nebulae: I. Light Curve Studies of 12 Carbon-Rich Objects

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astro-ph.SR2009★ 54 cited

Variability in Proto-Planetary Nebulae: I. Light Curve Studies of 12 Carbon-Rich Objects

Bruce J. Hrivnak, Wenxian Lu, Richard E. Maupin +1

We have carried out long-term (14 years) V and R photometric monitoring of 12 carbon-rich proto-planetary nebulae. The light and color curves display variability in all of them. Th…