Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231....1h&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, March 1, 1988, p. 1-24.
Astronomy and Astrophysics
Astronomy
43
Cataclysmic Variables, H Lines, Periodic Variations, Stellar Spectra, Calcium, Light Curve, Potassium, Stellar Spectrophotometry, Velocity Distribution
Scientific paper
The authors present photometric and spectroscopic data from the May 1984 and December 1985 superoutbursts of the SU UMa system Z Cha. By fitting composite absorption and emission profiles to the spectroscopic data, radial velocity curves were produced for each night using Hβ, Hγ, Hδ, He I λ4471, and Ca II K. The mean (γ) of each of these velocity curves is found to be non-zero (i.e. they do not represent the quiescent value of the systemic velocity) and it is found that γ is modulated on the superhump beat period of 2.1 days with a zero-velocity phase of ≡0.75, and amplitude of ≡80 km s-1. The mean of the modulation is compatible with the quiescent value of γ = 0±9 km s-1. This observational result is interpreted with new non-axisymmetric disc simulations as arising in an eccentric, precessing disc which is tidally distorted by the secondary.
Barrett Paul Everett
Charles Phil A.
Honey W. B.
Smale Alan P.
Whitehurst Robert
No associations
LandOfFree
Z Cha in superoutburst - Periodic variation in the systemic velocity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Z Cha in superoutburst - Periodic variation in the systemic velocity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Z Cha in superoutburst - Periodic variation in the systemic velocity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1691535