Vv-Puppis in an Active Phase

Details Vv-Puppis in an Active Phase Vv-Puppis in an Active Phase

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..275v&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 196, P. 275, 1981

Astronomy and Astrophysics

Astronomy

18

Scientific paper

We present and discuss the time resolved spectrophotometric and polarimetric observations of VV Puppis obtained on 1979 June 14 when the system was in a highly active state. The spectra show strong variable emission lines of H, He I and He II, characteristic of AM Herculis. Strong evidence for a contribution to the optical continuum from a second accretion column comes from the phase dependence of the continuum energy distribution. Further, broad absorption troughs due to cyclotron absorption are seen in the continuum from the second pole, suggesting a polar field strength of ≥ 6 × 107 G, higher than the value 3 × 107 G, found previously for the main accreting pole. in this instance no cyclotron absorption features are seen from the main pole.
The observed sinusoidal emission line radial velocity variation with phase, with velocity amplitude 2K = 680 km s-1, has been interpreted in terms of a single mass transfer stream directed towards the accreting white dwarf.

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