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An X-ray-emitting blast wave from the recurrent nova RS Ophiuchi

Abstract

Stellar explosions such as novae and supernovae produce most of the heavy elements in the Universe. The onset of a nova is well understood1 as driven by runaway thermonuclear fusion reactions on the surface of a white dwarf in a binary star system; but the structure, dynamics and mass of the ejecta are not well known. In rare cases, the white dwarf is embedded in the wind nebula of a red-giant companion, and the explosion products plough through the nebula and produce X-ray emission. Here we report X-ray observations of such an event, from the eruption of the recurrent nova RS Ophiuchi2,3. The hard X-ray emission from RS Ophiuchi early in the eruption emanates from behind a blast wave, or outward-moving shock wave, that expanded freely for less than 2 days and then decelerated owing to interaction with the nebula. The X-rays faded rapidly, suggesting that the blast wave deviates from the standard spherical shell structure4,5,6. The early onset of deceleration indicates that the ejected shell had a low mass, the white dwarf has a high mass7, and that RS Ophiuchi is therefore a progenitor of the type of supernova (type Ia) integral to studies of the expansion of the Universe.

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Figure 1: X-ray spectra from the first 3 weeks of the 2006 outburst of RS Oph.
Figure 2: X-ray flux and post-shock plasma temperature as a function of time.

References

  1. Starrfield, S., Truran, J. W. & Sparks, W. M. CNO abundances and hydrodynamic studies of the Nova outburst. V–1.0-solar-mass models with small mass envelopes. Astrophys. J. 226, 186–202 (1978)

    Article  ADS  CAS  Google Scholar 

  2. Kenyon, S. J. The Symbiotic Stars (Cambridge University Press, Cambridge, UK, 1986)

    Book  Google Scholar 

  3. Bode, M. F. (ed.) RS Ophiuchi (1985) and the Recurrent Nova Phenomenon (VNU Science, Utrecht, 1987)

  4. Sedov, L. Similarity and Dimensional Methods in Mechanics (Academic, New York, 1959)

    MATH  Google Scholar 

  5. Chevalier, R. A. Self-similar solutions for the interaction of stellar ejecta with an external medium. Astrophys. J. 258, 790–797 (1982)

    Article  ADS  Google Scholar 

  6. Bode, M. F. & Kahn, F. D. A model for the outburst of nova RS Ophiuchi in 1985. Mon. Not. R. Astron. Soc. 217, 205–215 (1985)

    Article  ADS  CAS  Google Scholar 

  7. Yaron, O., Prialnik, D., Shara, M. M. & Kovetz, A. An extended grid of nova models. II. The parameter space of nova outbursts. Astrophys. J. 623, 398–410 (2005)

    Article  ADS  CAS  Google Scholar 

  8. Narumi, H. et al. RS Ophiuchi. IAU Circ. 8671 (2006)

  9. Jahoda, K. et al. In-orbit performance and calibration of the Rossi X-ray Timing Explorer (RXTE) Proportional Counter Array (PCA). Proc. SPIE 2808, 59–70 (1996)

    Article  ADS  CAS  Google Scholar 

  10. Dobrzycka, D. & Kenyon, S. J. A new spectroscopic orbit for RS Ophiuchi. Astron. J. 108, 2259–2266 (1994)

    Article  ADS  Google Scholar 

  11. Fekel, F. C., Joyce, R. R., Hinkle, K. H. & Skrutskie, M. F. Infrared spectroscopy of symbiotic stars. I. Orbits for well-known S-type systems. Astron. J. 119, 1375–1388 (2000)

    Article  ADS  Google Scholar 

  12. Hjellming, R. M. et al. Radio observations of the 1985 outburst of RS Ophiuchi. Astrophys. J. 305, L71–L75 (1986)

    Article  ADS  CAS  Google Scholar 

  13. Snijders, M. A. J. in RS Ophiuchi (1985) and the Recurrent Nova Phenomenon (ed. Bode, M. F.) 51–60 (VNU Science, Utrecht, 1987)

    Google Scholar 

  14. Mukai, K. & Ishida, M. The early X-ray emission from V382 Velorum (Nova Velorum 1999): An internal shock model. Astrophys. J. 551, 1024–1030 (2001)

    Article  ADS  Google Scholar 

  15. Greiner, J., Orio, M. & Schartel, N. XMM-Newton observations of Nova LMC 2000. Astron. Astrophys. 405, 703–710 (2003)

    Article  ADS  Google Scholar 

  16. Orio, M. in Compact Binaries in the Galaxy and Beyond 182–186 (eds Tovmassian, G. & Sion, E.) (IAU Colloquium 194, Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, 2004)

    Google Scholar 

  17. Chevalier, R. A., Kirshner, R. P. & Raymond, J. C. The optical emission from a fast shock wave with application to supernova remnants. Astrophys. J. 235, 186–195 (1980)

    Article  ADS  CAS  Google Scholar 

  18. Iijima, T. RS Ophiuchi. IAU Circ. 8675 (2006)

  19. Buil, C. RS Ophiuchi. Cent. Bur. Astron. Tel. 403 (2006)

  20. Fujii, M. Optical spectrum of RS Oph. VSNET-alert 8869 (2006)

  21. O'Brien, T. J., Lloyd, H. M. & Bode, M. F. An interacting winds model for the X-ray emission from V838 Her (Nova Herculis 1991). Mon. Not. R. Astron. Soc. 271, 155–160 (1994)

    Article  ADS  Google Scholar 

  22. Mason, K. O., Córdova, F. A., Bode, M. F. & Barr, P. in RS Ophiuchi (1985) and the Recurrent Nova Phenomenon (ed. Bode, M. F.) 167–175 (VNU Science, Utrecht, 1987)

    Google Scholar 

  23. O'Brien, T. J. & Kahn, F. D. Models for the remnants of recurrent novae–II. Dynamical effect of radiative heat loss. Mon. Not. R. Astron. Soc. 228, 277–287 (1987)

    Article  ADS  Google Scholar 

  24. Taylor, A. R., Davis, R. J., Porcas, R. W. & Bode, M. F. VLBI observations of RS Oph–a recurrent nova with non-spherical ejection. Mon. Not. R. Astron. Soc. 237, 81–91 (1989)

    Article  ADS  Google Scholar 

  25. Lloyd, H. M., Bode, M. F., O'Brien, T. J. & Kahn, F. D. Bipolar recurrent nova outbursts–I. Hydrodynamic models. Mon. Not. R. Astron. Soc. 265, 457–470 (1993)

    Article  ADS  Google Scholar 

  26. Hachisu, I. & Kato, M. Recurrent novae as a progenitor system of Type Ia supernovae. I. RS Ophiuchi subclass: Systems with a red giant companion. Astrophys. J. 558, 323–350 (2001)

    Article  ADS  CAS  Google Scholar 

  27. Hamuy, M. et al. An asymptotic-giant-branch star in the progenitor system of a type Ia supernova. Nature 424, 651–654 (2003)

    Article  ADS  CAS  PubMed  Google Scholar 

  28. Wood-Vasey, W. M., Wang, L. & Aldering, G. Photometry of SN 2002ic and implications for the progenitor mass-loss history. Astrophys. J. 616, 339–345 (2004)

    Article  ADS  CAS  Google Scholar 

  29. Wood-Vasey, W. M. & Sokoloski, J. L. Novae as a mechanism for producing cavities around the progenitors of SN 2002ic and other SNe Ia. Astrophys. J. (in the press)

  30. Davis, R. J. in RS Ophiuchi (1985) and the Recurrent Nova Phenomenon (ed. Bode, M. F.) 187–192 (VNU Science, Utrecht, 1987)

    Google Scholar 

Download references

Acknowledgements

We are grateful for discussions with J. Raymond, C. Rakowski, M. Wood-Vasey and C. Matzner. J.L.S. acknowledges support from the NSF. G.J.M.L. acknowledges support from NASA, and from CNPq and FAPESP (Brazil).

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Correspondence to J. L. Sokoloski.

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Sokoloski, J., Luna, G., Mukai, K. et al. An X-ray-emitting blast wave from the recurrent nova RS Ophiuchi. Nature 442, 276–278 (2006). https://doi.org/10.1038/nature04893

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