PNN NGC 246: A Complex Photometric Behaviour That Requires Wet by Pérez J. M. González, Solheim J.-E., Dorokhova T. N., Dorokhov N. I.

“…This complex photometric behaviour may be explained by a more complicated unresolved combination of modulation frequencies, but more likely due to a combination of pulsations of the star plus modulations related to interaction with a close companion, maybe indicating a disc. …”
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