High-speed photometry of V404 Cygni in outburst

Details High-speed photometry of V404 Cygni in outburst High-speed photometry of V404 Cygni in outburst

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..340g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 10, 1991, p. 340-343.

Astronomy and Astrophysics

Astrophysics

11

Accretion Disks, Astronomical Photometry, Dwarf Novae, X Ray Sources, Light Curve, Power Spectra, Stellar Models

Scientific paper

High-speed photometric observations are presented of the optical counterpart of the X-ray transient GS 2023 + 338 (V404 Cygni) obtained during the decline from a major outburst. The low-frequency flickering previously reported in X-rays, optical, and radio waves is confirmed. From four night's coverage in September 1989, no evidence is found in the light curve for a unique coherent period. However, transient broad features are observed in the power spectra at periods in the range of 3-10 minutes. Similar features are commonly seen in the optical light curves of erupting dwarf novae; they may be a characteristic signature of disk accretion onto any type of compact star.

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