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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

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Open Access
Online
ISSN
2543-6376
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Volume 21, Issue 1-2

Issues

Symbiotic Nova PU Vul - 33 Years of Observations

S. Shugarov
  • Corresponding author
  • Astronomical Institute, Slovak Academy of Science, 059 60 Tatranská Lomnica, Slovakia Russian Federation
  • Sternberg Astronomical Institute, University avenue 13, Moscow 119992, Russian Federation
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ D. Chochol / E. Kolotilov
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0369

Abstract

We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days. the 194-day shift of the secondary minimum from its expected positions in 2001 suggests the eccentricity of the binary orbit. Period analysis of the VRI photometry improved the pulsation period of the cool AGB variable in the system to P = 217.7 days. Pulsation of the cool component is detected only in the phases around the primary minimum, when the visible hemisphere of the AGB star is not influenced by the interaction with the hot component.

Keywords: stars; binaries; symbiotic; novae; eclipsing; AGB; techniques; photometric

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About the article

Received: 2011-08-31

Accepted: 2011-09-10

Published Online: 2017-03-23

Published in Print: 2012-06-01


Citation Information: Open Astronomy, Volume 21, Issue 1-2, Pages 150–156, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0369.

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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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