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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

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ICV 2018: 120.66

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Volume 21, Issue 1-2


A Composite Light Curve Model of the Symbiotic Nova PU Vul (1979)

M. Kato
  • Corresponding author
  • Department of Astronomy, Keio University, Hiyoshi, Yokohama 223-8521, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ J. Mikołajewska / I. Hachisu
  • Department of Earth Science and Astronomy, College of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0370


PU Vul (1979) is a symbiotic nova that shows a long-lasting flat optical peak followed by a slow decline. We made a quasi-evolution model for outbursts on a 0.6 M white dwarf consisting of a series of static solutions with optically-thin winds. Our theoretical models reproduce well the observed visual/UV light curves as well as the new estimates of the temperature and radius of the hot component. We also modeled the light curve of the 1980 and 1994 eclipses as the total eclipse occulted by a pulsating M-giant companion star. In the second eclipse, the visual magnitude is dominated by nebular emission which is possibly ejected from the hot component between 1990 to 2000. We have quantitatively estimated three components of emission, i.e., the white dwarf, companion and nebular, and made a composite light curve that represents well the evolution of the PU Vul outburst.

Keywords: stats; symbiotic; novae; cataclysmic variables; white dwarfs; individual (PU Vul)


About the article

Received: 2011-09-01

Accepted: 2011-09-15

Published Online: 2017-03-23

Published in Print: 2012-06-01

Citation Information: Open Astronomy, Volume 21, Issue 1-2, Pages 157–164, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0370.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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