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Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71

Zdenek Mikulasek·Augustin Skopal·Miloslav Zejda·Ondrej Pejcha·Lubos Kohoutek·David Motl·A. A. Vittone·L. Errico
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Abstract

We present an analysis of light variations in UBVRI of the anomalous object in the center of planetary nebula Sh 2-71. We refined the linear ephemeris of the light maxima to JD{max} = 2449862.0 + 68.101 (E-96), but also identified long-term, obviously non-periodic variations. The latter manifest themselves in large O-C shifts, a variable profile of light curves (hereafter LC) and changes in the mean brightness of the object. Our spectroscopic observations suggested the presence of a superdense nebula in the center of Sh 2-71.

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Zdenek Mikulasek, Augustin Skopal, Miloslav Zejda, Ondrej Pejcha, Lubos Kohoutek, David Motl, A. A. Vittone, L. Errico. 2005-10-21. Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71. https://arxiv.org/abs/astro-ph/0510649

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