The X-Ray Evolution of the Symbiotic Star V407 Cyg During its 2010 Outburst

Baltic astronomy

article

K. Mukai¹  T. Nelson¹  L. Chomiuk⁴  D. Donato⁶  J. Sokoloski⁸ 

[1] CRESST and X-ray Astrophysics Laboratory;Department of Physics, University of Maryland;Present Address: School of Physics and Astronomy, University of Minnesota;Harvard-Smithsonian Center for Astrophysics;National Radio Astronomy Observatory;CRESST and Astroparticle Physics Laboratory;Department of Astronomy, University of Maryland, College Park;Columbia Astrophysics Laboratory, Columbia University

关键词: stars;    symbiotic;    white dwarfs;    X-rays;    stars;   

DOI  :  10.1515/astro-2017-0358

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

We present a summary of Swift and Suzaku X-ray observations of the 2010 nova outburst of the symbiotic star, V407 Cyg. the Suzaku spectrum obtained on day 30 indicates the presence of the supersoft component from the white dwarf surface, as well as optically thin component from the shock between the nova ejecta and the Mira wind. the Swift observations then allow us to track the evolution of both components from day 4 to day 150. Most notable is the sudden brightening of the optically thin component around day 20. We identify this as the time when the blast wave reached the immediate vicinity of the photosphere of the Mira. We have developed a simpe model of the blast wave - wind interaction that can reproduce the gross features of the X-ray evolution of V407 Cyg. If the model is correct, the binary separation is likely to be larger than previously suggested and the mass-loss rate of the Mira is likely to be relatively low.

【 授权许可】

Unknown