High Frequency Oscillations in SS Cygni

M J Arévalo ,C Lázaro,J E Solheim

doi:10.1017/s0252921100100089

M J Arévalo , C Lázaro + Show 1 more

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Because of its relative brightness (mv about 11.8 in quiescence and mv about 8.6 in outburst), SS Cygni is the Dwarf Novae most extensively studied since 1896 (Mattei et al., 1985; Bath and van Paradijs, 1983).Concerning its long-term behaviour, SS Cygni has short, long and anomalous out-bursts. Correlations between outburst characteristics and periodicities have been studied by van Paradijs (1983), Campbell (1934), and Sterne and Campbell (1934).SS Cygni, as any cataclysmic variable, also presents rapid variations. Since the discovery of this variability (Warner and Robinson, 1972) many long runs of high-speed photometry have been performed for different Dwarf Novae, both during out-bursts and in quiescence stages. Regarding to SS Cygni we can summarize these variations as:

Highlights

Because of its relative brightness (m about 11.8 in quiescence and m about 8.6 in v v outburst), SS Cygni is the Dwarf Novae most extensively studied since 1896 (Mattei et al, 1985; Bath and van Paradijs, 1983).Concerning its long-term behaviour, SS Cygni has short, long and anomalous outbursts
Quasi periodic oscillations: Periods of 31.5 s have been reported (Robinson and Nather, 1979) at maximum eruption. These decline in time periods of 150 s and the mean amplitudes are 0.003 mag
Bartolini et al (1985) and detected mainly in the red bands R and I, that they take as support to the hypothesis that SS Cygni belongs to the intermediate polars group

Summary

Introduction

Because of its relative brightness (m about 11.8 in quiescence and m about 8.6 in v v outburst), SS Cygni is the Dwarf Novae most extensively studied since 1896 (Mattei et al, 1985; Bath and van Paradijs, 1983).Concerning its long-term behaviour, SS Cygni has short, long and anomalous outbursts. Quasi periodic oscillations: Periods of 31.5 s have been reported (Robinson and Nather, 1979) at maximum eruption. These decline in time periods of 150 s and the mean amplitudes are 0.003 mag. Patterson (1981) found 32 and 36 s QPO's in outbursts.

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