Photometric solutions for U Cephei

Details Photometric solutions for U Cephei Photometric solutions for U Cephei

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..162o&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Feb. 1984, p. 162-166. Research supported by the Un

Astronomy and Astrophysics

Astronomy

9

Eclipsing Binary Stars, Orbital Elements, Stellar Spectrophotometry, Broadband, Infrared Astronomy, Light Curve, Ubv Spectra, Ultraviolet Astronomy

Scientific paper

Observations of U Cephei in recent years have shown that transient photometric disturbances can occur at all orbital phases of this active binary (Olson, 1980). Because of this activity, reliable photometric solutions are difficult to obtain. New solutions are attempted using intermediate-band uvby I observations selected from intervals of minimum disturbance. It is shown that large discrepancies are present in both infrared and ultraviolet solutions. The results are compared with three other modern solutions based on broadband photometry. Yellow, blue, and violet observations give the following mean geometrical elements: r1 = 0.183 + or 0.004, b2 = 0.324 + or - 0.002, and i = 85.8 deg + or 0.3 deg. It is pointed out that infrared and ultraviolet elements differ strongly from these mean elements.

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