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The X-Ray Evolution of the Symbiotic Star V 407 Cygni During Its 2010 OutburstWe present a summary of Swift and Suzaku X-ray observations of the 2010 nova outburst of the symbiotic star, V 407 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 think 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 simplified 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 large and the mass loss rate of the Mira is likely to be relatively low.
Document ID
20110023528
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Mukai, K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nelson, T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chomiuk, L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Donato, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sokoloski, J. (Columbia Univ. New York, NY, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2011
Subject Category
Astrophysics
Report/Patent Number
GSFC.JA.5438.2011
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Public Use Permitted.

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