BINARY CENTRAL STARS of PLANETARY NEBULAE DISCOVERED THROUGH PHOTOMETRIC VARIABILITY. III. the CENTRAL STAR of ABELL 65

Todd C. Hillwig, David J. Frew, Melissa Louie, Orsola De Marco, Howard E. Bond, David Jones, S. C. Schaub

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Abstract

A growing number of close binary stars are being discovered among central stars of planetary nebulae. Recent and ongoing surveys are finding new systems and contributing to our knowledge of the evolution of close binary systems. The push to find more systems was largely based on early discoveries which suggested that 10%-15% of all central stars are close binaries. One goal of this series of papers is confirmation and classification of these systems as close binaries and determination of binary system parameters. Here we provide time-resolved multi-wavelength photometry of the central star of Abell 65 as well as further analysis of the nebula and discussion of possible binary-nebula connections. Our results for Abell 65 confirm recent work showing that it has a close, cool binary companion, though several of our model parameters disagree with the recently published values. With our longer time baseline of photometric observations from 1989 to 2009 we also provide a more precise orbital period of 1.0037577 days.

Original languageEnglish
Article number30
Pages (from-to)1-8
Number of pages8
JournalAstronomical Journal
Volume150
Issue number1
DOIs
Publication statusPublished - 1 Jul 2015

Bibliographical note

Copyright 2015 The American Astronomical Society. First published in The Astronomical Journal, 150(1), 30, 2015. The original publication is available at http://www.doi.org/10.1088/0004-6256/150/1/30, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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