Linear polarization variations modulo 5.6 days in HDE 226868

Autor:	L. J. Caroff, I. G. Nolt, J. V. Radostitz, R. G. Southwick, J. C. Kemp, R. J. Rudy
Rok vydání:	1975
Předmět:	Physics Amplitude Space and Planetary Science Linear polarization Binary star Astronomy and Astrophysics Polarimeter Optical polarization Astrophysics Variable star Light curve Orbital period
Zdroj:	The Astrophysical Journal. 199:L27
ISSN:	1538-4357 0004-637X
DOI:	10.1086/181841
Popis:	Results are reported for observations of variations in the linear polarization in HDE 226868 (the optical counterpart of Cyg X-1) made with a photoelastic polarimeter and a U-filter. The UV linear-polarization variations, as folded on the 5.6-day orbital period, are found to have amplitudes of 0.25% and position-angle changes of 2.7 deg. These results are shown to be consistent with the geometry and phasing required by the model of the binary system.
Databáze:	OpenAIRE
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