High-speed photometry of V404 Cygni in outburst

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170123· OSTI ID:5445940

Gotthelf, E; Patterson, J; Stover, R J ^[1]

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1. Columbia University, New York (USA) California, University, Los Angeles (USA) Lick Observatory, Santa Cruz, CA (USA)

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. 35 refs.

• OSTI ID: 5445940
• Journal Information: Astrophysical Journal; (United States), Vol. 374; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ERUPTIVE VARIABLE STARS
PHOTOMETRY
ACCRETION DISKS
BRIGHTNESS
COSMIC X-RAY SOURCES
RADIOWAVE RADIATION
STAR ACCRETION
STAR MODELS
VISIBLE RADIATION
X RADIATION
COSMIC RAY SOURCES
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MATHEMATICAL MODELS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
STAR EVOLUTION
STARS
VARIABLE STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources