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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

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2543-6376
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Volume 21, Issue 1-2

Issues

An Extremely Massive White Dwarf of the Symbiotic Classical Nova V407 Cyg as Suggested by the RS Oph and U SCO Models

I. Hachisu
  • Corresponding author
  • Department of Earth Science and Astronomy, College of Arts and Sciences, Uni. of Tokyo, Tokyo 153-8902, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ M. Kato
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0360

Abstract

We have analyzed the optical light curve of the symbiotic star V407 Cyg that underwent a classical nova outburst in 2010 March. Being guided by a supersoft X-ray phase observed during days 20-40 after the nova outburst, we are able to reproduce the light curve during a very early phase of the nova outburst. Our model consists of an outbursting white dwarf and an extended equatorial disk. An extremely massive white dwarf of 1.35-1.37 M is suggested. the optical light curve is also consistent with a sharp drop 47 days after the outburst, which is the end of hydrogen shell-burning on the white dwarf. Although the extremely massive white dwarf is favourable to the interpretation that V407 Cyg is a recurrent nova, enrichment of heavy elements in the ejecta suggests that the white dwarf is eroded and, as a result, its mass is not increasing. Therefore, V407 Cyg may not explode as a Type Ia supernova even if it is a carbon-oxygen white dwarf.

Keywords: binaries; symbiotic; novae; cataclysmic variables; stars; individual (RS Oph; U Sco; V407 Cyg); white dwarfs

References

  • Abdo A. A., Ackermann M., Ajello M. et al. 2010, Science, 329, 817Google Scholar

  • Deguchi S., Koike K., Kuno N., Matsunaga N., Nakashima J., Takahashi S. 2011, PASJ, 63, 309Google Scholar

  • Hachisu I., Kato M. 2001, ApJ, 558, 323Google Scholar

  • Hachisu I., Kato M. 2006, ApJS, 167, 59Google Scholar

  • Hachisu I., Kato M., Kato T., Matsumoto K., Nomoto K. 2000, ApJ, 534, L189Google Scholar

  • Hachisu I., Kato M., Kiyota S. et al. 2006, ApJ, 651, L141Google Scholar

  • Hachisu I., Kato M., Luna G. J. M. 2007, ApJ, 659, L153Google Scholar

  • Hachisu I., Kato M., Nomoto K. 1996, ApJ, 470, L97Google Scholar

  • Hachisu I., Kato M., Nomoto K. 1999a, ApJ, 522, 487Google Scholar

  • Hachisu I., Kato M., Nomoto K., Umeda H. 1999b, ApJ, 519, 314Google Scholar

  • Hjellming R. M., van Gorkom J. H., Seaquist E. R., Taylor A. R., Padin S., Davis R. J., Bode M. F. 1986, ApJ, 305, L71Google Scholar

  • Kato M. 1999, PASJ, 51, 525Google Scholar

  • Kato M., Hachisu I. 1994, ApJ, 437, 802Google Scholar

  • Mukai K., Nelson T., Chomiuk L. et al. 2012, Baltic Astronomy, 21, 54Google Scholar

  • Munari U., Joshi V. H., Ashok N. M. et al. 2011, MNRAS, 410, L52Google Scholar

  • Munari U., Margoni R., Stagni R. 1990, MNRAS, 242, 653Google Scholar

  • Nishiyama K., Kabashima F. et al. 2010, IAU Circular, 9130, 1Google Scholar

  • Nomoto K. 1982, ApJ, 253, 798Google Scholar

  • Osborne J. P., Page K. L., Beardmore A. P. et al. 2011, ApJ, 727, 124Google Scholar

  • Schaefer B. 2009, ApJ, 697, 721Google Scholar

  • Shore S. N., Wahlgren G. M., Augusteijn T. et al. 2011, A&A, 527, A98Google Scholar

  • Snijders M. A. J. 1987, in RS Ophiuchi (1985) and the Recurrent Nova Phenomenon, ed. M. F. Bode, VNU Science Press, Utrecht, p. 51Google Scholar

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 68–75, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0360.

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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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