Open AccessThe Central Binary and Surrounding Nebula of the Symbiotic Star V1016 Cygni
Author(s) -
C. Brocksopp,
M. F. Bode,
S. P. S. Eyres,
M. M. Crocker,
Roger J. Davis,
A. R. Taylor
Publication year - 2002
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/340018
Subject(s) - physics , nebula , astrophysics , planetary nebula , symbiotic star , astronomy , stars , emission nebula , position angle , space telescope imaging spectrograph , emission spectrum , bipolar outflow , spectrograph , reflection nebula , telescope , doubly ionized oxygen , hubble space telescope , spectral line , star formation , galaxy
We present HST/WFPC2 images of the symbiotic star V1016 Cyg which, for thefirst time, directly explore the inner regions of the nebula to AU scales atoptical wavelengths. They also suggest that the [OIII] 4959,5007 emission takesplace in a bipolar outflow. We use these images to determine the position ofthe two stars and hence a projected binary separation of 84 AU (assuming adistance of 2 kpc) and a position angle of 143.5 degrees. Furthermore, wecombine our images with VLA radio imaging which enables diagnostic tests to beapplied and properties of the circumstellar nebula to be determined. Finally wehave obtained archive HST/STIS spectra of V1016 Cyg with which we were able tospatially resolve the source at various positions in the nebula. This enableddiscovery of the ultraviolet counterpart to the ~25 arcsec extended emissionfound by Bang et al. (1992).Comment: Accepted for publication in Ap
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