Optical observations of the X-ray binary V1727 Cygni (=4U 2129+47) during a low state: some unexpected results

Observations are presented of the X-ray binary V1727 Cygni = 4U 2129+47, which usually shows a pronounced X-ray heating light curve on a 5.2 hr period, taken when the object was in an X-ray and optical low state. No photometric modulation or eclipose is detected. It is found that there is no way to...

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Veröffentlicht in:	Astrophys. J.; (United States) 1988-11, Vol.334 (1), p.430-435
Hauptverfasser:	THORSTENSEN, J. R, BROWNSBERGER, K. R, MOOK, D. E, REMILLARD, R. A, CCLINTOCK, J. E, KOO, D. C, CHARLES, P. A
Format:	Artikel
Sprache:	eng
Schlagworte:	640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources Astronomy BINARY STARS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC RAY SOURCES COSMIC X-RAY SOURCES Earth, ocean, space ELECTROMAGNETIC RADIATION Exact sciences and technology HEATING IONIZING RADIATIONS MATHEMATICAL MODELS PHOTOMETRY RADIATIONS STAR MODELS STARS Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system VISIBLE RADIATION X RADIATION X-ray sources x-ray bursts
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Beschreibung
Zusammenfassung:	Observations are presented of the X-ray binary V1727 Cygni = 4U 2129+47, which usually shows a pronounced X-ray heating light curve on a 5.2 hr period, taken when the object was in an X-ray and optical low state. No photometric modulation or eclipose is detected. It is found that there is no way to reconcile these observations with previous models of the system. 26 references.
ISSN:	0004-637X 1538-4357
DOI:	10.1086/166847