High-time resolution spectroscopy of VW Hydri and WX Hydri

Details High-time resolution spectroscopy of VW Hydri and WX Hydri High-time resolution spectroscopy of VW Hydri and WX Hydri

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97..185s&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 1, Apr. 1981, p. 185-191.

Astronomy and Astrophysics

Astrophysics

65

Binary Stars, Dwarf Stars, Line Spectra, Novae, Stellar Spectra, Stellar Spectrophotometry, Variable Stars, Absorption Spectra, Balmer Series, Emission Spectra, H Lines, Helium, Iron, Radial Velocity, Spectrum Analysis, Stellar Mass, Stellar Motions

Scientific paper

One of the principal results of the reported study is the confirmation of the binary period of VW Hyi by a radial orbit. The periodic hump, which can be observed photometrically in quiescence every 107 min actually reflects the orbital motion of the binary system. This fact immediately eliminates the model of Papaloizou and Pringle (1978). For the second dwarf nova, WX Hyi, an orbital period of 0.0748134 d could be derived from the radial velocity curve. H, He I, and Fe II emission lines could be identified in the spectra of both stars. Evident changes in the line strength could be found in the course of a supermaximum (of VW Hyi). The emission lines' well-known trend of disappearing near maximum brightness was confirmed.

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