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Transient short time periodicities in the optical enission from Cyg X-1

Nature volume 259, pages 27–29 (1976)Cite this article

Abstract

TEMPORAL structure down to the millisecond time scale has been observed in the X-ray emission of Cyg X-1 (ref. 1). This has been interpreted as evidence of instabilities in the accretion disk surrounding a black hole2–4, lasting for approximately the orbital period of the infalling matter. We report here observations of modulated optical emission from this source with a period of ∼ 83 ms. The modulated emission was detected in two sets of obserations as transient events lasting ∼ 10 min. This is the first evdence of strong emission at optical wavelengths from the C-ray source in the Cyg X-1-HDE226868 system.

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Authors and Affiliations

  1. Laboratorio di Astrofisica Spaziale, CNR Frascati, Italy

    G. AURIEMMA, D. CARDINI, E. COSTA, F. GIOVANNELLI, M. ORCIUOLO & M. RANIERI

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  1. G. AURIEMMA
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  2. D. CARDINI
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  3. E. COSTA
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  4. F. GIOVANNELLI
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  5. M. ORCIUOLO
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  6. M. RANIERI
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AURIEMMA, G., CARDINI, D., COSTA, E. et al. Transient short time periodicities in the optical enission from Cyg X-1. Nature 259, 27–29 (1976). https://doi.org/10.1038/259027a0

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  • DOI: https://doi.org/10.1038/259027a0

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